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Preprint ARTICLE | doi:10.20944/preprints202305.1825.v1

Wave Climate Variability along the Coastlines of Senegal over the Last 4 Decades

Marcellin SEUJIP SAMOU, Xavier BERTIN, Issa SAKHO, Alban LAZAR, Mamadou SADIO, Mouhamadou BACHIR DIOUF

Subject: Environmental And Earth Sciences, Oceanography Keywords: Wave climate; WaveWatch III; Wave Climatology; Wave Trends; Remote climatic modes; in-situ data; Atlantic Ocean; Senegalese coast; Senegal

Online: 26 May 2023 (03:19:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1590.v1

Research on Construction and Application of Ocean Circulation Spatial-Temporal Ontology

Hao Zhang, Anmin Zhang, Liuyang Zhang, Shuai Liu

Subject: Environmental And Earth Sciences, Oceanography Keywords: ontology; spatial-temporal ontology; ocean circulation; semantic analysis; Web Ontology Language (OWL)

Online: 23 May 2023 (07:12:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1423.v1

Capabilities of the ODYSEA Wind and Current Mission to Estimate Wind Work at the Air-Sea Interface

Hector Torres, Alexander Wineteer, Patrice Klein, Tong Lee, Jinbo Wang, Ernesto Rodriguez, Dimitris Menemenlis, Hong Zhang

Subject: Environmental And Earth Sciences, Oceanography Keywords: Wind and current mission concept; Doppler scatterometer; wind work

Online: 19 May 2023 (10:05:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0585.v1

Factors Contributing to the Long-Term Sea Level Trends in the Iberian Peninsula and the Balearic and Canary Islands

Manuel Vargas-Yáñez, Elena Tel, Marta Marcos, Francina Moya, Enrique Ballesteros, Cristina Alonso, M. Carmen García-Martínez

Subject: Environmental And Earth Sciences, Oceanography Keywords: Relative Sea Level; Steric contribution; liner regression; Western Mediterranean; Iberian Peninsula; Canary Islands

Online: 9 May 2023 (07:35:12 CEST)

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We present an attempt to estimate the long-term changes of Relative Sea Level (RSL) and the different factors contributing to such trends on a local and regional scale using a statistical linear model. The time series analysed correspond to 17 tide-gauges grouped in three different areas: the northern and western Atlantic coasts of the Iberian Peninsula, the Canary Islands, and the southern and eastern coasts of the Iberian Peninsula and Balearic Islands. The analysis was performed for two periods: 1948-2019, using tide-gauge data, and 1993-2019, using both tide-gauge and altimetry data for comparison. The trends for the period 1948-2019 ranged between 1.09 0.14 (Canary Islands) and 2.05 0.21 mm/yr, for the northern and western Atlantic Iberian Peninsula. Altimetry data during the period 1993-2019 yielded quite homogeneous results for all the locations and regions, ranging between 2.7 0.4 and 3.0 0.3 mm/yr. On the contrary, the results obtained from tide-gauge data for this recent period showed a large dispersion, very likely due to local effects or even levelling or instrumental errors. Nevertheless, when the results were averaged for each area, the observed trends were comparable to the altimetry results, with values of 2.3 0.8, 2.7 0.5 and 2.8 0.8 mm/yr for the three regions of study. A stepwise forward linear regression has been used to relate the observed RSL variability to the atmospheric forcing and the thermosteric and halosteric components of the sea level. Surprisingly, the thermosteric and halosteric contributions were not significantly correlated to the observed RSL in many cases, and consequently the steric, the total addition of mass, the mass of salt, and the freshwater contributions to the observed sea level trends could not be reliably estimated. This result seems to be the consequence of the scarcity of temperature and salinity data. This hypothesis is confirmed by the exception of L’Estartit tide-gauge. This location is close to a well sampled region. In this case, the atmospheric variables and the thermosteric and halosteric terms explained the 80 % of the observed RSL variance and the contributions of these terms could be estimated. The freshwater contribution for this location was between 1.3 and 1.4 mm/yr, consistent with recent estimations of the contributions of glaciers and Greenland and Antarctica Ice Sheets. These results highlight the importance of monitoring programs and routine sampling for the determination of the different factors contributing to the sea level variability.

Preprint ARTICLE | doi:10.20944/preprints202305.0480.v1

Phytoplankton Dynamics and Biogeochemistry of the Black Sea

Vladimir Silkin, Larisa Pautova, Oleg Podymov, Valery Chasovnikov, Anna Lifanchuk, Aleksey Fedorov, Agnislava Kluchantseva

Subject: Environmental And Earth Sciences, Oceanography Keywords: phytoplankton; Black Sea; biogeochemistry; species composition; diatoms; coccolithophores

Online: 8 May 2023 (08:47:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0135.v2

Wave Buoy Measurements at Short Fetches in the Black Sea Nearshore: Mixed Sea and Energy Fluxes

Aleksandra Rybalko, Stanislav Myslenkov, Sergei Badulin

Subject: Environmental And Earth Sciences, Oceanography Keywords: nearshore; wind-driven waves; swell; mixed (crossing) sea; wave spectra; Kolmogorov-Zakharov spectra

Online: 5 May 2023 (05:01:46 CEST)

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Preprint REVIEW | doi:10.20944/preprints202304.1168.v1

Modes of Operation and Forcing in Oil Spill Modeling: State-of-Art, Deficiencies and Challenges

Panagiota Keramea, Nikolaos Kokkos, George Zodiatis, Georgios Sylaios

Subject: Environmental And Earth Sciences, Oceanography Keywords: oil spill modeling; meteorological and hydrodynamic forcing; wave models; met-ocean data; forecasting; biogeochemical models; oil biodegradation.

Online: 28 April 2023 (10:49:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0523.v1

Spit Morphology at an Inlet in Phu Quoc Island, Vietnam

Dinh Van Duy, Tran Van Ty, Tran Nhat Thanh, Huynh Vuong Thu Minh, Cao Van De, Vu Hoang Thai Duong, Trinh Cong Dan, Nguyen Trung Viet, Hitoshi Tanaka

Subject: Environmental And Earth Sciences, Oceanography Keywords: sand spit; morphological evolution; Sentinel; Phu Quoc; LSTR

Online: 18 April 2023 (11:18:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0135.v1

Wave Buoy Measurements at Short Fetches in the Black Sea Nearshore: Mixed Sea and Energy Fluxes

Aleksandra Rybalko, Stanislav Myslenkov, Sergei Badulin

Subject: Environmental And Earth Sciences, Oceanography Keywords: nearshore; wind-driven waves; swell; mixed (crossing) sea; wave spectra; Kolmogorov-Zakharov spectra

Online: 10 April 2023 (03:27:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202302.0160.v2

Letter Migrations between Words in Reading Aloud Can Result Either from an Impairment in Orthographic Input or in Phono-Logical Output

Liora Toledano, Naama Friedmann

Subject: Environmental And Earth Sciences, Oceanography Keywords: Keywords: Developmental dyslexia; attentional dyslexia; Hebrew; migrations between words; phonological output buffer; orthographic-visual analyzer; reading

Online: 20 March 2023 (04:08:07 CET)

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Abstract: Letter migrations between words in reading aloud (e.g., reading "cane love" as "lane love" or "lane cove") are known to result from a deficit in the visual-orthographic analysis and characterize attentional dyslexia. In spontaneous speech, individuals with impairment in the phonological output buffer may show migrations of phonemes between words. The purpose of this study was to examine whether migrations between words in reading aloud can also result from a deficit in the phonological output buffer, to explore the characteristics of migrations resulting from orthographic input and from phonological output deficits, and to examine methods to distinguish these two sources. Using tasks of reading aloud of 92-182 word pairs, we identified 18 adults and adolescents with developmental dyslexia who made between-word letter migrations in reading aloud, significantly more than age-matched controls (372 adults and 26 7th-graders). To distinguish between orthographic-input and phonological-output sources for these migrations, we administered a test assessing orthographic-input without spoken-output (written-semantic-decision on 140 migratable word pairs) and a test of repetition of 36 auditorily-presented migratable word pairs, assessing spoken output without orthographic-input (and word span tests). These tests indicated that the migrations of ten of the participants with dyslexia resulted from an orthographic-input deficit, and for the other eight participants, migrations resulted from a phonological-output deficit. We identified several differences between the two types of between-word errors: first, whereas the individuals with attentional dyslexia made omissions of a letter that appeared in the same position in the two words, the phonological output buffer group did not make such omissions. In addition, the groups differed in the origin of migration: orthographic input migrations involve letters that are orthographically adjacent, whereas phonological output migrations involve phonemes that have just been spoken or that are prepared together in the phonological buffer for production. This was manifested in that migrations from the line below and from two lines above occurred only in the orthographic input deficit group, and migrations occurred from a word vertically close to the target in the orthographic input group but from a word that has just been spoken (placed diagonally to the target) in the phonological output group. This study thus indicates that between-word migrations in reading-aloud can result not only from attentional dyslexia, but also from a phonological output buffer deficit, and offers ways to distinguish between the two.

Preprint ARTICLE | doi:10.20944/preprints202303.0287.v1

On Surface Waves Generated By Extra-Tropical Cyclones. Part I: Multi-Satellite Measurements

Vahid Cheshm Siyahi, Vladimir Kudryavtsev, Maria Yurovskaya, Fabrice Collard, Bertrand Chapron

Subject: Environmental And Earth Sciences, Oceanography Keywords: Extreme Waves; Extra-Tropical Cyclones; Altimeter and SWIM-CFOSAT; Ocean Surface Waves Remote Sensing; Atlantic Ocean; Ocean Surface Waves Monitoring and Modeling; Self-Similar Solutions; Fetch and Duration Laws

Online: 15 March 2023 (14:05:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202303.0284.v1

On Surface Waves Generated By Extra-Tropical Cyclones. Part II: Simulations

Vahid Cheshm Siyahi, Vladimir Kudryavtsev, Maria Yurovskaya, Fabrice Collard, Bertrand Chapron

Subject: Environmental And Earth Sciences, Oceanography Keywords: Extreme Waves; Extra-Tropical Cyclones; Altimeter and SWIM-CFOSAT; Ocean Surface Waves Remote Sensing; Atlantic Ocean; Ocean Surface Waves Monitoring and Modeling; Parametric-2D Wave-ray Model; Swell Evolution; Synthetic Aperture Radar

Online: 15 March 2023 (10:51:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0286.v1

High-Resolution Model of Clew Bay – Model Set-up and Validation Results

Hazem Nagy, Ioannis Mamoutos, Glenn Nolan, Robert Wilkes, Tomasz Dabrowski

Subject: Environmental And Earth Sciences, Oceanography Keywords: Clew Bay; ROMS; ADCP; Tide Gauge; Taylor Diagram; SSH

Online: 16 January 2023 (13:06:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0147.v1

China Coastal Front from Himawari-8 AHI SST Data. Part 1: East China Sea

Igor M Belkin, Shang-Shang Lou, Wen-Bin Yin

Subject: Environmental And Earth Sciences, Oceanography Keywords: China Coastal Front; Zhejiang-Fujian Front; Zhe-Min Front; Himawari-8; Advanced Himawari Imager; East China Sea; Taiwan Strait; Sea surface temperature

Online: 9 January 2023 (06:53:06 CET)

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High-resolution (2 km) high-frequency (hourly) SST data from 2015-2020 provided by the Advanced Himawari Imager (AHI) onboard the Japanese Himawari-8 geostationary satellite positioned over 140.7°E were used to study spatial and temporal variability of the China Coastal Front (CCF) in the East China Sea. The hourly SST data were processed with the Belkin and O’Reilly (2009) algorithm to generate long-term mean monthly maps of SST gradient magnitude (GM) and frontal frequency (FM) using a GM threshold of 0.1°C/km. Horizontal structure of SST field in the vicinity of the CCF was investigated from cross-frontal distributions of SST along 8 parallels from 31°N to 24°N. The high resolution (2 km) monthly distributions of SST along these 8 parallels were used to determine inshore and offshore boundaries of the CCF and calculate the CCF strength defined as the total cross-frontal SST step dSST=Offshore SST – Inshore SST. The CCF emerges in November, fully develops in December and peaks in strength in January-February. The front’s fragmentation and shrinking/weakening begins in February and March, respectively. In winter (December-February), the front’s strength dSST exceeds 5°C offshore the Zhejiang-Fujian coast and could be as high as 7.5°C when nearshore waters cool down to 7°C. In winter, the front’s strength decreases downstream from 31°N to 24°N. The CCF changes its physical nature as the seasons progress. In winter, the CCF is a water mass front between cold and fresh water coming from the north and warm and salty water coming from the south. In summer, the CCF becomes a coastal upwelling front maintained largely by southerly winds. In winter, the CCF’s cross-frontal structure in the SST field is ramp-shaped, with SST increasing monotonously in the offshore direction. In summer, the CCF’s cross-frontal structure in the SST field is V-shaped or U-shaped, featuring a minimum SST formed by cold upwelled water at some distance from the shore. Thus, the summer SST structure effectively consists of two fronts, a nearshore and offshore, with a minimum SST in-between. Across the inshore/offshore front, the SST decreases/increases in the offshore direction. The local bathymetry, especially the relatively steep shelf slope between 20-m and 50-m isobath, steers the front, which does not meander in winter offshore the Zhejiang-Fujian coast. As the cold season progresses, the front’s axis gradually shifts into deeper waters, from ~20 m to ~50 m.

Preprint ARTICLE | doi:10.20944/preprints202212.0316.v1

Quality assessment of Sea Surface Salinity from multiple Ocean Reanalysis Products

Haodi Wang, You Ziqi, Hailong Guo, Wen Zhang, Peng Xu, Kaijun Ren

Subject: Environmental And Earth Sciences, Oceanography Keywords: sea surface salinity; ocean reanalysis; moored buoy; in situ measurements; validation

Online: 19 December 2022 (03:45:59 CET)

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Sea surface salinity (SSS) is one of the Essential Climate Variables (ECVs) as defined by the Global Climate Observing System (GCOS). Acquiring high-quality SSS datasets with high spatial-temporal resolution is cruicial for research on the hydrological cycle and earth climate. This study assessed the quality of SSS data provided by four high-resolution ocean reanalysis products, including the Hybrid Coordinate Ocean Model (HYCOM) 1/12° global reanalysis, the The Copernicus Global 1/12° Oceanic and Sea Ice GLORYS12 Reanal-ysis, the Simple Ocean Data Assimilation (SODA) reanalysis, the ECMWF Oceanic Reanalysis System 5 (ORAS5) product and the Estimating the Circulation and Climate of the Ocean Phase II (ECCO2) reanalysis. Regional comparison in the Mediterranean Sea shows that reanalysis largely depicts the accurate spatial SSS structure away from river mouths and coastal areas but slightly underestimates the mean SSS values. Better SSS reanalysis performance is found in the Levantine Sea while larger SSS uncertainties are found in the Adriatic Sea and the Aegean Sea. The global comparison with CMEMS level-4 (L4) SSS show generally con-sistent large-scale structures. The mean ΔSSS between monthly gridded reanalysis data and in situ analyzed data is -0.1 PSU in the open seas between 40°S and 40°N with the mean Root Mean Square Deviation (RMSD) generally smaller than 0.3 PSU and the majority of correlation coefficients higher than 0.5. Comparison with collocated buoy salinity shows that reanalysis products well captures the SSS variations at the locations of tropical moored buoy arrays at weekly scale. Among all the four products, the data quality of HYCOM re-analysis SSS is highest in marginal sea, GLORYS12 has the best performance in the global ocean especially in tropical regions. Comparatively, ECCO2 has the overall worst performance to reproduce SSS states and variations by showing the largest discrepancies with CMEMS L4 SSS.

Preprint ARTICLE | doi:10.20944/preprints202212.0226.v1

Parameterization of Eddy Mass Transport in the Arctic Seas based on the Sensitivity Analysis of Large-scale Flows

Gennady Platov, Dina Iakshina, Elena Golubeva

Subject: Environmental And Earth Sciences, Oceanography Keywords: eddy mass transport; subgrid-scale processes; parametrization; Arctic ocean; sensitivity study; clustering

Online: 13 December 2022 (04:19:37 CET)

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Preprint REVIEW | doi:10.20944/preprints202212.0125.v1

Remote Sensing of the Subtropical Front in the Southeast Pacific and the Ecology of Chilean Jack Mackerel Trachurus murphyi

Igor M Belkin, Xin-Tang Shen

Subject: Environmental And Earth Sciences, Oceanography Keywords: Front; Southern Ocean; Subtropical Front; Subtropical Convergence; Subtropical Frontal Zone; Remote sensing; Satellite oceanography; SMOS; Marine ecology; Fisheries; Chilean jack mackerel; Trachurus m

Online: 7 December 2022 (09:56:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0049.v2

Algorithm for Additional Correction of Remote Sensing Reflectance in the Presence of Absorbing Aerosol

Anna Stanislavovna Papkova, Evgeny Borisovich Shybanov

Subject: Environmental And Earth Sciences, Oceanography Keywords: optical characteristics; chlorophyll-a concentration; ocean color; seawater; absorbing aerosol; dust; MODIS Aqua; AERONET; Black Sea

Online: 2 December 2022 (08:52:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0398.v1

Temporal Variability of the Remote Sensing Reflectance and Color Index Trends in the Western Part of The Black Sea

Evgeny Borisovich Shybanov, Anna Stanislavovna Papkova, Darya V. Kalinskaya

Subject: Environmental And Earth Sciences, Oceanography Keywords: water-leaving radiance; remote sensing reflectance; color index; seasonal blooms; AERONET; Black Sea; MODIS Aqua; AOT; VIIRS

Online: 22 November 2022 (02:53:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0049.v1

Algorithm for Additional Correction of Remote Sensing Reflectance in the Presence of Absorbing Aerosol

Evgeny Borisovich Shybanov, Anna Stanislavovna Papkova

Subject: Environmental And Earth Sciences, Oceanography Keywords: optical characteristics; chlorophyll-a concentration; ocean color; seawater; absorbing aerosol; dust; MODIS Aqua; AERONET; Black Sea

Online: 2 November 2022 (07:03:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202209.0221.v1

Prediction of Potential Seagrass Habitat Using Remote Sensing Big Data and Machine Learning

Bohao He, Yanghe Zhao, Siyu Liu, Shahid Ahmad, Wei Mao

Subject: Environmental And Earth Sciences, Oceanography Keywords: seagrass; remote sensing; machine learning; species distribution model (SDM); hybrid model; habitat suitability; niches; meta-heuristic optimization

Online: 15 September 2022 (07:32:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0206.v1

Analysis of Regional Differentiation and Sediment Provenance in the Lu’erhuan River Sea Area of Qinzhou Bay, Guangxi Province

Ping Li, Jun Du, Zhi wei Zhang, Guo qiang Xu

Subject: Environmental And Earth Sciences, Oceanography Keywords: Qinzhou Bay; sediment provenance; human activities; endmember analysis

Online: 14 September 2022 (09:48:06 CEST)

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Globally,coastal regions are vital areas of human activities and, as such, are centres of population growth and urban and economic development. Long-term human development has had a major impact on the ecological environment of coastal zones. Therefore, exploring the distribution and provenance of marine sediment types in coastal areas heavily influenced by human activities can provide scientific evidence and references for the current and future ecological management of these sensitive environments. For this reason, we have conducted an analysis on the sediment grain size, Endmember, organic matter content and geochemical elements in the Lu’erhuan River‒Malan Island‒Sandun Island area in the eastern part of Qinzhou Bay, a region heavily influenced by human activities. Sediment grain size clearly differs throughout the study site and the material provenances and hydrodynamic conditions are also varied, likely due to the local environmental conditions and the significant impact human activities have had on the area. The finest-grained sediment is imported from either inland or coastal areas via rivers and weak tidal currents, the next finest component is input from coastal areas through weak tidal currents, and the moderately coarse component mainly originates from nearby beaches. The two coarsest-grained sediment components are influenced by the combination of human activities, tidal currents and waves and enter the water via erosion. Organic matter provenance resembles that of the sediment components, exhibiting varied characteristics. This is due to the combination of natural and human activities in the bay. The organic matter in the upper reaches of the Lu’erhuan River originates from the river and coastal paddy fields, with obvious terrigenous characteristics; the organic matter in northern Malan Island mainly comes from external sources related to oyster farming; while organic matter in eastern Sandun Island is mainly produced endogenously by marine plankton. Al, Ti, Fe, Mg, K, Ga and other elements indicate that terrestrial sediments are significantly disturbed by human activities. However，Mn reflects the marine distribution of terrestrial sediments from the Lu’erhuan River to Jishuimen. Ca and Sr, indicators of marine sediments, are distributed in the eastern offshore area of Sandun Island, which is connected to the open waters. Due to the influence of human activities, As and Cd are highly enriched in the study area, while Cu is less affected by human activities.

Preprint ARTICLE | doi:10.20944/preprints202209.0038.v1

Coastal Upwelling in the western Bay of Bengal: Role of Local and Remote Windstress

Sthitapragya Ray, Debadatta Swain, M. M. Ali, Mark A. Bourassa

Subject: Environmental And Earth Sciences, Oceanography Keywords: Coastal upwelling; Upwelling index; Scatterometer; Wind stress; Kelvin Wave; Ekman Transport

Online: 2 September 2022 (09:57:06 CEST)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202208.0484.v1

A Simple Procedure to Preprocess and Ingest High-Resolution Ocean Color Data into Google Earth Engine

Elígio de Raús Maúre, Simon Ilyushchenko, Genki Terauchi

Subject: Environmental And Earth Sciences, Oceanography Keywords: remote sensing; ocean color; Google Earth Engine; MODIS/Aqua, SGLI/GCOM-C, swath reprojection, Earth Engine data ingestion

Online: 29 August 2022 (10:09:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0319.v1

Determining Interannual Variability of the Annual Cycle

Meng Zhang, Hans Von Storch

Subject: Environmental And Earth Sciences, Oceanography Keywords: annual cyckle; complex EOFs; statistical analysis; South China Sea

Online: 17 August 2022 (10:11:52 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202207.0450.v1

SynthWakeSAR: A Synthetic SAR Dataset for Deep Learning Classification of Ships at Sea

Igor G. Rizaev, Alin Achim

Subject: Environmental And Earth Sciences, Oceanography Keywords: SAR image; ship wake; deep learning; synthetic dataset

Online: 29 July 2022 (05:51:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0061.v1

Coastal Upwelling in the Bay of Bengal: Role of Local and Remote Windstress

Sthitapragya Ray, Debadatta Swain, M. M. Ali, Mark A. Bourassa

Subject: Environmental And Earth Sciences, Oceanography Keywords: Coastal upwelling; Upwelling index; Scatterometer; Wind stress; Kelvin Wave; Ekman Transport

Online: 5 July 2022 (05:36:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0049.v1

Reconstructing the Three-Dimensional Structure of Loop Current Rings from Satellite Altimetry and in situ Data using the Gravest Empirical Modes Method

Thomas Meunier, Paula Perez Brunius, Amy Bower

Subject: Environmental And Earth Sciences, Oceanography Keywords: three-dimensional eddy reconstruction; Loop Current rings; Gulf of Mexico; Gravest Empirical Modes

Online: 4 July 2022 (10:05:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0048.v1

A Contrast Minimization Approach to Quantify and Remove Sun Glint in Landsat 8 / OLI Imagery

Frank Fell

Subject: Environmental And Earth Sciences, Oceanography Keywords: ocean color; sun glint; atmospheric correction; Landsat 8

Online: 4 July 2022 (09:57:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202206.0288.v1

SailBuoy Ocean Currents:Low Cost Upper Layer Ocean Current Measurements

Nellie Wullenweber, Lars Robert Hole, Peygham Ghaffari, Inger Graves, Harald Tholo, Lionel Camus

Subject: Environmental And Earth Sciences, Oceanography Keywords: SailBuoy; ADCP; Ocean current; Observation

Online: 21 June 2022 (05:33:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202206.0006.v1

Coastal Flooding & Sea-Level Rise: Calculation of Flood Risk Using Tide-Gauge Measurements

Stephen Taylor

Subject: Environmental And Earth Sciences, Oceanography Keywords: Sea Level Rise; coastal flooding; JPM; Gumbel; exceedance; extreme value statistics; flood return period; sea-defences

Online: 1 June 2022 (05:58:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0004.v2

A New Perspective on Four Decades of Changes in Arctic Sea Ice from Satellite Observations

Xuanji Wang, Yinghui Liu, Jeffrey R. Key, Richard Dworak

Subject: Environmental And Earth Sciences, Oceanography Keywords: sea ice; Cryosphere; Arctic Ocean; Arctic sea ice change; Arctic climate change; remote sensing retrieval; satellite remote sensing; APP; APP-x; trend study

Online: 28 March 2022 (04:13:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0004.v1

A New Perspective on Four Decades of Changes in Arctic Sea Ice from Satellite Observations

Xuanji Wang, Yinghui Liu, Jeffrey R. Key, Richard Dworak

Subject: Environmental And Earth Sciences, Oceanography Keywords: sea ice; Cryosphere; Arctic Ocean; Arctic sea ice change; Arctic climate change; remote sensing retrieval; satellite remote sensing; APP; APP-x; trend study

Online: 1 March 2022 (04:32:25 CET)

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Preprint SHORT NOTE | doi:10.20944/preprints202202.0281.v1

Feasibility of an Open-Source Algorithm for Predicting Sea Surface Temperature Based on Three Multi-Resolution Data Sources

Ranulfo Rodríguez-Sobreyra, León Felipe Álvarez-Sánchez, Francisco Flores-De-Santiago

Subject: Environmental And Earth Sciences, Oceanography Keywords: Sub-pixel mapping; Super-resolution mapping; Downscaling; Gulf of California

Online: 22 February 2022 (16:07:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202202.0260.v1

Satellite and in situ Sampling Mismatches: Consequences for the Estimate of Satellite Sea Surface Salinity Uncertainties

Clovis Thouvenin-Masson, Jacqueline Boutin, Jean-luc Vergely, Gilles Reverdin, Adrien C. H. Martin, Sébastien Guimbard, Nicolas Reul, Roberto Sabia, Rafael Catany, Odile Hembise Fanton d'Andon

Subject: Environmental And Earth Sciences, Oceanography Keywords: sea surface salinity; sampling mismatch; sub footprint variability; uncertainty; validation

Online: 22 February 2022 (02:44:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0424.v1

Estimating Dredge-Induced Turbidity using Drone Imagery

Madeline Hayes, Brandon Puckett, Charles Deaton, Justin Ridge

Subject: Environmental And Earth Sciences, Oceanography Keywords: turbidity; water quality; drones; dredging

Online: 27 January 2022 (17:01:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0414.v2

Shallow Water Bathymetry Inversion Using Hybrid Multi-band Composites Resulted from Integration of Drone-based RGB and Multispectral Imagery

Evangelos Alevizos, Athanasios V Argyriou, Dimitris Oikonomou, Dimitrios D Alexakis

Subject: Environmental And Earth Sciences, Oceanography Keywords: drones; UAV; bathymetry; shallow water; multispectral; inversion

Online: 6 January 2022 (12:28:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0003.v2

Impact of Ocean Currents on Wind Stress in the Tropical Indian Ocean

Neethu Chacko, M M Ali

Subject: Environmental And Earth Sciences, Oceanography Keywords: Scatterometer; wind stress; surface currents; Indian Ocean

Online: 31 December 2021 (14:50:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0414.v1

Shallow water bathymetry inversion using hybrid multi-band composites resulted from integration of drone-based RGB and multispectral imagery

Evangelos Alevizos, Athanasios V Argyriou, Dimitris Oikonomou, Dimitrios D Alexakis

Subject: Environmental And Earth Sciences, Oceanography Keywords: drones; UAV; bathymetry; shallow water; multispectral; inversion

Online: 24 December 2021 (23:48:39 CET)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202112.0250.v1

Validation of Recent Altimeter Missions at Non-dedicated Tide Gauge Stations in the Southeastern North Sea

Saskia Esselborn, Tilo Schöne, Julia Illigner, Robert Weiß, Thomas Artz, Xinge Huang

Subject: Environmental And Earth Sciences, Oceanography Keywords: regional sea level; satellite altimetry; tide gauge; validation; mission bias; North Sea; Sentinel-3A; Jason-1; Jason-2; Jason-3; Envisat; Saral

Online: 15 December 2021 (09:25:54 CET)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202111.0349.v1

Monte Carlo Radiative Transfer Simulation to Analyze the Spectral Index for Remote Detection of Oil Dispersed in the Southern Baltic Sea Seawater Column: The Role of Water Surface State

Zbigniew Otremba, Jacek Piskozub

Subject: Environmental And Earth Sciences, Oceanography Keywords: oil-in-water emulsion; seawater; oil pollution detection; radiance reflectance; Monte Carlo simulation, spectral index

Online: 19 November 2021 (12:28:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0003.v1

Impact of Ocean Currents on Wind Stress in the Tropical Indian Ocean

Neethu Chacko, M M Ali

Subject: Environmental And Earth Sciences, Oceanography Keywords: Scatterometer; wind stress; surface currents; Indian Ocean

Online: 1 November 2021 (10:21:14 CET)

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Working Paper ARTICLE

Pre-Computation of Image Features for the Classification of Dynamic Properties in Waves

Ryan Smith, Frederic Dias, Gabriele Facciolo, Brendan Murphy

Subject: Environmental And Earth Sciences, Oceanography Keywords: breaking waves; optical flow; convolutional neural networks; image classification

Online: 11 October 2021 (15:49:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0461.v1

Validating Salinity From SMAP With Saildrones and Research Vessel Data During EUREC4A-OA/ATOMIC

Kashawn Hall, Alton Daley, Shanice Whitehall, Sanola Sandiford, Chelle Leigh Gentemann

Subject: Environmental And Earth Sciences, Oceanography Keywords: Saildrone; Soil Moisture Active Passive (SMAP); Hybrid Coordinate Ocean Model (HYCOM); EUREC4A; ATOMIC; physical oceanography; remote sensing; air-sea interactions

Online: 24 August 2021 (08:43:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0203.v1

The Finite Size Lyapunov Exponent and the Finite Amplitude Growth Rate

Thomas Meunier, J.H. LaCasce

Subject: Environmental And Earth Sciences, Oceanography Keywords: Finite size Lyapunov Exponent; Finite amplitude growth rate; Two-dimensional turbulence; Lagrangian fluid dynamics

Online: 9 August 2021 (15:07:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0207.v1

Ali Belmadani, Pierre-Amaël Auger, Katherine Gomez, Nikolai Maximenko, Sophie Cravatte

Subject: Environmental And Earth Sciences, Oceanography Keywords: striations; satellite data; sea surface temperature; sea surface salinity; chlorophyll-a; eastern boundaries; Pacific Ocean

Online: 8 June 2021 (10:31:07 CEST)

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Preprint REVIEW | doi:10.20944/preprints202106.0183.v1

Subtropical Frontal Zone of the Southern Ocean

Igor M Belkin

Subject: Environmental And Earth Sciences, Oceanography Keywords: Front; Subtropical Front; Southern Ocean; Subtropical Frontal Zone; Subtropical Mode Water; Chilean jack mackerel; Trachurus murphyi

Online: 7 June 2021 (13:12:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202104.0146.v1

Spatial-temporal Distribution of Salt Marshes in Intertidal Zone of China during 1985-2019

Guangwei Chen, Zhanjiang Ye, Runjie Jin, Junyu He, Jiaping Wu, Jiali Gu

Subject: Environmental And Earth Sciences, Oceanography Keywords: Salt Marshes, Google Earth Engine, SVM, Distribution, China’s coast

Online: 5 April 2021 (14:28:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0538.v1

Remote Sensing Observations of Dominant Breaking Waves in Intermediate to Deep Water from a Lighthouse During Storm Conditions

Caio Eadi Stringari, Jean-François Filipot, Fabien Leckler, Rui Duarte

Subject: Environmental And Earth Sciences, Oceanography Keywords: wave breaking; remote sensing; intermediate water waves, dominant waves; plunging waves; rogue waves; machine learning.

Online: 22 March 2021 (13:53:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202101.0137.v1

Self- and Inter-Crossover Points of Jasons’ Missions as New Essential Add-on of Satellite Altimetry in the Sub-Arctic Seas and the Southern Ocean

Sergei Badulin, Andrey Kostianoy, Pavel Shabanov, Vitali Sharmar, Vika Grigorieva, Sergey Lebedev

Subject: Environmental And Earth Sciences, Oceanography Keywords: Satellite altimetry, Topex/Poseidon, Jasons missions, self-crossover points, inter-crossover points, Sub-Arctic Seas, Southern Ocean, sea level, wind speed, wave height, virtual buoy

Online: 8 January 2021 (11:08:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202012.0538.v1

LiDAR Observations of Multi-modal Swash Probability Distributions on a Dissipative Beach

Caio Eadi Stringari, Hannah E. Power

Subject: Environmental And Earth Sciences, Oceanography Keywords: LiDAR; swash zone; nearshore waves; probability distributions; sandy beaches

Online: 21 December 2020 (15:58:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202011.0529.v1

A Unifying Perspective on Transfer Function Solutions to the Unsteady Ekman Problem

Jonathan M. Lilly, Shane Elipot

Subject: Environmental And Earth Sciences, Oceanography Keywords: Ekman currents; ocean surface currents; wind stress forcing; transfer function; wind-driven response

Online: 20 November 2020 (09:32:45 CET)

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Preprint REVIEW | doi:10.20944/preprints202010.0394.v1

Towards the Next Generation of Tsunami Impact Simulations

Simone Marras, Kyle Mandli

Subject: Environmental And Earth Sciences, Oceanography Keywords: Tsunami Modeling; Tsunami Simulations; Numerical Methods

Online: 19 October 2020 (15:50:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202010.0078.v1

Oceanic Response Based on the Rectified Data during Three Typhoons in the northern South China Sea

Daoxun Ke, Han Zhang, Youmin Tang, Juncheng Zuo, Dongfeng Xu, Chenghao Yang, Zhixiong Yao, Zheqi Shen, Di Tian

Subject: Environmental And Earth Sciences, Oceanography Keywords: rectification; bias; typhoon; kinetic energy

Online: 5 October 2020 (12:05:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0212.v1

A Simple Band-ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing Over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor

Dat Dinh Ngoc, Hubert Loisel, Vincent Vantrepotte, Huy Chu Xuan, Ngoc Nguyen Minh, Charles Verpoorter, Xavier Meriaux, Hanh Pham Thi Minh, Huong Le Thi, Hai Le Vu Hong, Thao Nguyen Van

Subject: Environmental And Earth Sciences, Oceanography Keywords: VNREDSat-1/NAOMI; Landsat-8/OLI; Suspended particulate matter; algorithm

Online: 9 September 2020 (13:49:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0586.v1

Validation of Sentinel-3 SAR Level-2 and Level-3 Products in the Baltic Sea and Estonian lakes

Aive Liibusk, Tarmo Kall, Sander Rikka, Rivo Uiboupin, Ülo Suursaar, Kuo-Hsin Tseng

Subject: Environmental And Earth Sciences, Oceanography Keywords: Sea level; GNSS; NEMO reanalysis; tide gauges; pressure buoys; geoid model; CMEMS; Copernicus

Online: 26 August 2020 (12:35:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0424.v1

A Fuzzy Inference System for Seagrass Distribution Modeling in the Mediterranean Sea

Dimitra Papaki, Nikolaos Kokkos, Georgios Sylaios

Subject: Environmental And Earth Sciences, Oceanography Keywords: seagrass; fuzzy inference system; modeling; species abundance; Mediterranean Sea

Online: 20 August 2020 (04:39:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0229.v1

Evaluation of the CDOM Absorption Coefficient in the Arctic Seas by Sentinel-3 OLCI Data

Dmitry Glukhovets, Oleg Kopelevich, Anna Yushmanova, Svetlana Vazyulya, Sergey Sheberstov, Polina Karalli, Inna Sahling

Subject: Environmental And Earth Sciences, Oceanography Keywords: OLCI Sentinel-3; Barents; Kara seas; absorption coefficient; uncertainties; field data

Online: 9 August 2020 (22:31:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202006.0186.v1

COVID-19 Impacts on Beaches and Coastal Water Pollution: Management Proposals Post-pandemic

Franklin Ormaza-González, Divar Castro-Rodas

Subject: Environmental And Earth Sciences, Oceanography Keywords: COVID-19; confinement; beaches; pollution; tourism

Online: 14 June 2020 (16:12:35 CEST)

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The COVID-19 pandemic has obliged Governments all around the world to take confinement and social 13 distancing measures. The reduction of leisure and production activities on beaches and ports have 14 disappeared direct and indirect contamination such as plastics, hydrocarbon spill, microbiological loads, 15 noise level, etc. leading to temporary improved environmental conditions, converting the beaches 16 similar to Marine Protected Areas. Some conditions are briefly analyzed through local surveys and in situ 17 observations in the popular beaches and ports of Salinas, Manta and Galápagos. 97-99 % of surveyed 18 people agreed that beaches have notoriously improved during confinement at least from visual 19 observation. On a scale from 1 (worst) to 5 (best), the beaches were rated 2.23 and 2.83 (less than 20 acceptable) before quarantine, and 4.48 and 4.33 after it for Salinas and Manta respectively. The 21 beaches have less garbage in general and plastic, even though there has been an increase in plastic and 22 face mask production around the world. In Salinas, 72%, and 23 % of surveyed people have seen small 23 pelagic fish, whilst in Manta 75%, and 41% of people saw the same, but also 17% of people have seen 24 whales (humpback and shark-whales) and dolphins practically swimming on the beach. Manta rays, 25 turtles, and other types of species were also observed. In Galapagos beaches, turtles have been 26 observed many more times than usual. The main plausible reason is the decrease in noise level. It is 27 recommended to take this unique opportunity, to construct a baseline data and information on physical, 28 chemical, biological, microbiological coastal oceanographic science, and from them to establish a proper 29 Coastal Zone Management based on beach description, water, and beach quality, human dimension, 30 and economic value indexes. This data and information construction should ideally be done before the 31 beaches are open.

Preprint ARTICLE | doi:10.20944/preprints202006.0092.v1

Denoising Sentinel-1 Extra-Wide Mode Cross-Polarization Images over Sea Ice

Yan Sun, Xiaoming Li

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar; cross-polarization; denoise

Online: 7 June 2020 (14:58:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0522.v1

Public Health And Population Perspective Of COVID-19 As A Global Pandemic

Nazneen Akhter, M. Salim Uzzaman, Amr Ravine

Subject: Environmental And Earth Sciences, Oceanography Keywords: COVID-19; Risk Group; Syndrome; Community Quarantine; Population dynamics; Social distancing

Online: 31 May 2020 (21:52:27 CEST)

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COVID-19 appeared as an infectious disease of global health emergency and highest public health concern of 21st century for this world due to its high speed of spread across the globe. The disease started as one single case to a cluster of cases in Wuhan, China (Dec 2019) and within few months with its continuous upsurge of cases spreading globally which has created enormous threat and tension across the global Public health care field. Most significantly to share the fact that, this disease caused high level of Risk Group mortality, high morbidity, health care services burden, panic anxiety, mental trauma and tension, social and economic insecurity, which also collectively surfaced by diverse range of social reaction and political pressure across the world. Also with the appearance of new and unknown pathogenesis of the disease has created the most and significant attention and concern for the scientific community and political leaders as well. The disease also varies significantly with its pattern of virus, sign, symptoms, characteristics including its epidemiological and public health response (like prevention strategy, diagnoses, case management, treatment pattern) across the countries. However, this variance is comparatively less rather even more in commonality while it comes to basic public health prevention interventions like frequent hand washing, wearing face mask, maintaining social/physical distancing (2 - 6 meter in between), individual isolation and community quarantine for suspected exposure and lockdown in community areas where cases are identified. These are basically the most commonly practiced public health interventions to deal with this disease in majority of the epicenters across countries. Also with the progression of the disease with its diverse categorical appearance of sign symptoms which are uniquely portraying this disease is more of a kind of COVID-19 syndrome rather than as COVID-19. Moreover, various factors including socio economic status, health status, population dynamics, health system and infrastructure, health behavioral pattern, nutrition and food habit and also access to information and knowledge made this viral disease one of the historically counted on expensive disease of the modern world to fight for. Specially to mention here, the case fatality rate distinctively vary with the population dynamics and the health system infrastructure and ability factors which have already created clear evidence as explained in this paper how these factors are uniquely distinguished and different from country to country. Apart from the contextual differences, the various kind of ongoing preventive measures (like prevention, diagnosis and treatment) learnt every day from the emerging characteristics and pattern of this viral disease which are most commonly practiced across countries with some kind of variance. According to the Public health prevention practice and interventions, the total world is quite connected and learning from each other’s public health experiences to fight for the virus. However, the whole world community are eagerly waiting to see the result and outcome of the ongoing therapeutics and vaccine trial initiated in several countries, the people of the world are quite optimistic and hopeful that, global scientific community will be able to invent some miraculous and magic solution in upcoming months which ultimately will free the world from this most terrifying COVID-19 pandemic of 21st century

Preprint ARTICLE | doi:10.20944/preprints202005.0336.v1

Extraction of Sea Ice Cover by Sentinel-1 SAR Based on SVM with Unsupervised Generation of Training Data

Xiaoming Li, Yan Sun, Qiang Zhang

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar; sea ice; machine learning

Online: 21 May 2020 (05:59:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0300.v1

Retrieval of Sea Surface Wind Speed from Spaceborne SAR over the Arctic Marginal Ice Zone with a Neural Network

Xiao-ming Li, Tingting Qin, Ke Wu

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar; sea surface wind; neural network

Online: 18 May 2020 (10:50:03 CEST)

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Working Paper DATASET

A Global Sea State Dataset from Spaceborne Synthetic Aperture Radar Wave Mode Data

Xiao-Ming Li, BingQing Huang

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar (SAR); wave mode; ocean waves

Online: 15 May 2020 (18:22:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202002.0216.v2

In-Stream Energy by Tidal and Wind-Driven Currents: An Analysis for the Gulf of California

Vanesa Magar, Victor M. Godínez, Markus S. Gross, Manuel López-Mariscal, Anahí Bermúdez-Romero, Julio Candela, Luis Zamudio

Subject: Environmental And Earth Sciences, Oceanography Keywords: tidal power density; in-stream renewable energy; peak spring tide flow; annual energy production; Gulf of California

Online: 24 February 2020 (03:14:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0319.v1

Improving Altimeter Wind Speed Retrievals Using Ocean Wave Parameters

Haoyu Jiang, Hao Zheng, Lin Mu

Subject: Environmental And Earth Sciences, Oceanography Keywords: altimeter; sea surface wind speed; significant wave height; mean wave period; atmospheric instability

Online: 23 February 2020 (11:09:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0216.v1

In-Stream Energy by Tidal and Wind-Driven Currents: An Analysis for the Gulf of California

Vanesa Magar, Victor M. Godínez, Markus S. Gross, Manuel López-Mariscal, Anahí Bermúdez-Romero, Julio Candela, Luis Zamudio

Subject: Environmental And Earth Sciences, Oceanography Keywords: tidal power density; in-stream renewable energy; peak spring tide flow; annual energy production; Gulf of California

Online: 16 February 2020 (13:21:56 CET)

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Working Paper REVIEW

Dissolved Artificial Radionuclides and Numerical Modelling for Coastal Seas Dispersion Studies: Data, Methods and Applications

Pascal Bailly du Bois, Franck Dumas, Claire Voiseux, Mehdi Morillon, Pierre-Emmanuel Oms, Luc Solier

Subject: Environmental And Earth Sciences, Oceanography Keywords: radionuclide; tracer; data collection; antimony 125 (125Sb), tritium (3H), dispersion; modelling; English Channel; North Sea; Biscay Bay

Online: 24 January 2020 (16:03:50 CET)

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Preprint DATASET | doi:10.20944/preprints202001.0200.v1

A Global Sea State Dataset from Spaceborne Synthetic Aperture Radar Wave Mode Data

Xiao-Ming Li, BingQing Huang

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar (SAR); wave mode; ocean waves

Online: 18 January 2020 (09:45:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202001.0034.v1

Improving Sea Level Anomaly Precision from Satellite Altimetry Using Parameters Correction in the Red Sea

Ahmed Mohammed Taqi, Abdullah Mohammed Al-Subhi, Mohammed Ali AlSaafani

Subject: Environmental And Earth Sciences, Oceanography Keywords: improving sea level anomaly; satellite altimetry; parameters correction; The Red Sea; coastal

Online: 4 January 2020 (11:16:17 CET)

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Working Paper ARTICLE

A Preliminary Study on Dimension-Reduction Algorithm for Variational Methods in Three Dimensions

Xuan Chen

Subject: Environmental And Earth Sciences, Oceanography Keywords: 3DVAR; data assimilation; cost function; Sylvester equation

Online: 5 December 2019 (10:36:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints201910.0227.v1

Lagrangian Drifter to Identify Ocean Eddy Characteristics

Peter C. Chu, Chenwu Fan

Subject: Environmental And Earth Sciences, Oceanography Keywords: lagrangian drifter; rafos floats; empirical model decomposition (emd); deterministic-stochastic emd; intrinsic mode function (imf); eddy radial scale; eddy velocity scale; eddy rossby number; eddy-current kinetic energy ratio

Online: 19 October 2019 (16:41:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201908.0299.v1

Hydrodynamic and Hydrographic Modeling of Istanbul Strait

Mehmet Melih Koşucu, Mehmet Cüneyd Demirel, V.S. Ozgur Kirca, Mehmet Özger

Subject: Environmental And Earth Sciences, Oceanography Keywords: Istanbul Strait; stratified flow; gravity driven flow; numerical modelling

Online: 28 August 2019 (15:23:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201908.0272.v1

Benthic Habitat Morphodynamics- Using Remote Sensing to Quantify Storm-Induced Changes in Nearshore Bathymetry and Surface Sediment Texture at Assateague National Seashore

Arthur Trembanis, Alimjan Abla, Ken Haulsee, Carter DuVal

Subject: Environmental And Earth Sciences, Oceanography Keywords: side-scan sonar; swath bathymetry; habitat monitoring; hurricane Sandy; hurricane Joaquin; climate change; shoreline detection; remote sensing

Online: 26 August 2019 (15:47:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201907.0266.v1

The DeepWater Horizon Oil Slick: High Resolution Model Simulations of River Front Effects, Initialized and Verified by Satellite Observations

Lars Robert Hole, Knut-Frode Dagestad, Johannes Röhrs, Cecilie Wettre, Vassiliki H. Kourafalou, Yannis Androulidakis, Heesook Kang, Matthieu Le Hénaff, Oscar Garcia-Pineda

Subject: Environmental And Earth Sciences, Oceanography Keywords: HYCOM; OpenDrift; OpenOil; oil spill; modelling; simulations; satellite; observations; river fronts; DeepWater Horizon

Online: 24 July 2019 (08:34:51 CEST)

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The effect of river fronts on oil slick transport has been demonstrated using high resolution forcing models and a fully fledged oil drift model, OpenOil. The model system is used to simulate the 2010 DeepWater Horizon oil spill. Metocean forcing data are taken from the GoM-HYCOM 1/50° ocean model with realistic river input and ECMWF global forecast products of wind and wave parameters with 1/8° resolution. The simulations are initialized from satellite observations of the surface oil patch. OpenOil includes most of the relevant processes, such as emulsification, evaporation, wave entrainment, stranding and droplet formation. The model takes account of the actual oil type and properties, using the ADIOS oil weathering database of NOAA. The effect of using a newly developed parameterization for oil droplet size distribution is studied and compared to a traditional algorithm. Although the algorithms provide different distributions for a single wave breaking event, it is found that the net difference after long simulations is negligible, indicating that the outcome is robust regarding the choice of parameterization. That indicates that the wave entrainment, vertical mixing and re-surfacing mechanisms that are part of OpenOil are more important for determining the final droplet size spectrum than the spectrum prescribed for individual wave breaking events. In both cases, the size of the droplets controls how much oil is present at the surface and hence are subject to wind and Stokes drift. The effect of removing river outflow in the ocean model is investigated in order to showcase effects of river induced fronts on oil spreading. A consistent effect on the amount and location of stranded oil is found, and considerable impact of river induced fronts is seen on the location of the surface oil patch. During a case with large river outflow (May 20-27, 2010), the total amount of stranded oil is reduced by about 50% in the simulation with no river input. The results compares well with satellite observations of the surface oil patch.

Working Paper ARTICLE

Lessons Learned from the NOAA CoastWatch Ocean Satellite Course Developed for Integrating Oceanographic Satellite Data into Operational Use

Cara Wilson, Dale Robinson

Subject: Environmental And Earth Sciences, Oceanography Keywords: Remote Sensing, Satellites, NOAA, CoastWatch, Oceanography, Training, Education, Operational Oceanography, ERDDAP, Value Added Provider

Online: 1 July 2019 (11:28:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201906.0167.v1

A Meso-Scale Approach to Estimating Vertical Mixing Induced by Wind–Waves

Vladislav Polnikov

Subject: Environmental And Earth Sciences, Oceanography Keywords: air-sea interface; wind–waves; turbulent currents; Reynolds stress; vertical mixing; eddy viscosity

Online: 18 June 2019 (05:44:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0309.v1

Using Saildrones to Validate Satellite-Derived Sea Surface Salinity and Sea Surface Temperature along the California/Baja Coast

Jorge Vazquez-Cuervo, Jose Gomez-Valdes, Marouan Bouali, Luis Miranda, Tom Van der Stocken, Wenquing Tang, Chelle Gentemann

Subject: Environmental And Earth Sciences, Oceanography Keywords: MODIS; oceanography; remote sensing; Saildrone; sea surface salinity; sea surface temperature; SMAP; validation

Online: 27 May 2019 (10:19:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0260.v1

Pixel Tracking for Micro-Motion Estimation of Maritime Targets by COSMO-SkyMed Synthetic Aperture Radar Data - An Operative Assessment

Filippo Biondi

Subject: Environmental And Earth Sciences, Oceanography Keywords: Synthetic aperture radar (SAR); along-track interferometry (ATI); sub-pixel offset tracking (sPOT); COSMO-SkyMed (CSK); staring spotlight (ST); micro-motion (m-m); vibrations; frequency modes

Online: 21 May 2019 (11:33:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0276.v1

The Interannual Changes in the Secondary Production and Mortality Rate of Main Copepod Species in the Gulf of Gdańsk (The Southern Baltic Sea)

Lidia Dzierzbicka-Głowacka, Maja Musialik-Koszarowska, Marcin Kalarus, Anna Lemieszek, Paula Prątnicka, Maciej Janecki, Maria Iwona Żmijewska

Subject: Environmental And Earth Sciences, Oceanography Keywords: copepoda; secondary production; mortality rates; Baltic sea; gulf of Gdańsk

Online: 25 April 2019 (08:05:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201903.0283.v1

A Data-Driven Approach to Classifying Wave Breaking in Infrared Imagery

Daniel Buscombe, Roxanne Carini

Subject: Environmental And Earth Sciences, Oceanography Keywords: wave breaking; remote sensing; surf zone; machine learning

Online: 29 March 2019 (12:16:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints201902.0185.v1

Retrieval of Sea Surface Wind Speeds from Gaofen-3 Full Polarimetric Data

Tianyu Zhang, Xiao-Ming Li, Qian Feng, Yongzheng Ren, Yingni Shi

Subject: Environmental And Earth Sciences, Oceanography Keywords: C-band SAR; sea surface wind speed retrieval; full polarimetry

Online: 20 February 2019 (09:07:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints201812.0291.v1

Determining the AMSR-E SST Footprint from Co-located MODIS SSTs

Brahim Boussidi, Peter Cornillon, Gavino Puggioni, Chelle Gentemann

Subject: Environmental And Earth Sciences, Oceanography Keywords: footprint, constrained Least square, Bootstrap, SST, AMSR-E, MODIS

Online: 24 December 2018 (15:40:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0042.v1

Assessing Diurnal Variability of Biogeochemical Processes Using the Geostationary Ocean Color Imager (GOCI)

Javier Concha, Antonio Mannino, Bryan Franz, Wonkook Kim

Subject: Environmental And Earth Sciences, Oceanography Keywords: geostationary ocean color imager (GOCI); ocean color; diurnal dynamics; diurnal variability; uncertainties

Online: 2 November 2018 (09:50:37 CET)

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Short-term (hours) biological and biogeochemical processes cannot be fully captured by the current suite of polar-orbiting satellite ocean color sensors, as their temporal resolution is limited to potentially one clear image per day. Geostationary sensors, such as the Geostationary Ocean Color Imager (GOCI) from the Republic of Korea, allow the study of these short-term processes because their geostationary orbits permit the collection of multiple images throughout each day. To assess the capability to detect changes in water properties caused by these processes, however, requires an understaning of the uncertainties introduced by the instrument and/or geophysical retrieval algorithms. This work presents a study of the variability during the day over a water region of low-productivity with the assumption that only small changes in the water properties occur during the day over the area of study. The complete GOCI mission data were processed using the SeaDAS/l2gen package. Filtering criteria were applied to assure the quality of the data. Relative differences with respect to the midday value were calculated for each hourly observation of the day. Also, the influence of the solar zenith angle in the retrieval of remote sensing reflectances and derived products was analyzed. We determined that the uncertainties in water-leaving “remote-sensing” reflectance ($R_\text{rs}$) for the 412, 443, 490, 555, 660 and 680 nm bands on GOCI are 8.05$\times10^{-4}$, 5.49$\times10^{-4}$, 4.48$\times10^{-4}$, 2.51$\times10^{-4}$, 8.83$\times10^{-5}$, and 1.36$\times10^{-4}$ sr$^{-1}$, respectively, and 1.09$\times10^{-2}$ mg m$^{-3}$ for the chlorophyll-a concentration (Chl-{\it a}), 2.09$\times10^{-3}$ m$^{-1}$ for the absorption coefficient of chromophoric dissolved organic matter at 412 nm ($a_{\text{g}}(412)$), and 3.7 mg m$^{-3}$ for particulate organic carbon (POC). We consider these to be the floor values for detectable changes in the water properties due to biological, physical or chemical processes.

Preprint ARTICLE | doi:10.20944/preprints201810.0715.v1

Benthic Foraminifera as Indicators of River Discharge in the Western South Atlantic Continental Shelf Margin

Patricia P.B. Eichler, André Rodrigues

Subject: Environmental And Earth Sciences, Oceanography Keywords: Western South Atlantic continental margin; benthic Foraminifera; fresh water; nutrients; eutrophication; anoxic

Online: 30 October 2018 (08:51:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints201810.0003.v2

Lateral Circulation in a Partially Stratified Tidal Inlet

Linlin Cui, Haosheng Huang, Chunyan Li, Dubravko Justic

Subject: Environmental And Earth Sciences, Oceanography Keywords: Estuarine Modeling; Lateral Circulation; Tidal Currents; Momentum Balance

Online: 30 October 2018 (08:49:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints201810.0106.v1

On the Optimal Design of Doppler Scatterometers

Ernesto Rodriguez

Subject: Environmental And Earth Sciences, Oceanography Keywords: surface currents; ocean vector winds; scatterometry; Doppler

Online: 5 October 2018 (15:58:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0003.v1

Lateral Circulation in a Partially Stratified Tidal Inlet

Linlin Cui, Haosheng Huang, Chunyan Li, Dubravko Justic

Subject: Environmental And Earth Sciences, Oceanography Keywords: Estuarine Modeling; Lateral Circulation; Tidal Currents; Momentum Balance

Online: 1 October 2018 (10:43:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0246.v3

A Hybrid Lagrangian-Eulerian Particle Model for Ecosystem Simulation

Pengfei Xue, David J. Schwab, Xing Zhou, Chenfu Huang, Ryan Kibler, Xinyu Ye

Subject: Environmental And Earth Sciences, Oceanography Keywords: property-carrying particle model; coupled models; ecosystem simulation; biophysical modeling; Sandusky bay; great lakes

Online: 17 September 2018 (11:23:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0137.v1

Advantages and Limitations to the Use of Optical Measurements to Study Sediment Dynamics

Emmanuel Boss, Christopher Sherwood, Paul Hill, Tim Milligan

Subject: Environmental And Earth Sciences, Oceanography Keywords: particle dynamics; optical properties; Sediment;

Online: 7 September 2018 (13:14:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0504.v1

Multi-Spectral Ship Detection using Optical, Hyperspectral, and Microwave SAR Remote Sensing for Sustainability of the Coastal Region

Kyung-Ae Park, Jae-Jin Park, Jae-Cheol Jang, Ji-Hyun Lee, Sangwoo Oh, Moon-Jin Lee

Subject: Environmental And Earth Sciences, Oceanography Keywords: ship detection; hyperspectral; SAR; optical remote sensing; sustainability; coastal region

Online: 29 August 2018 (14:32:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0246.v2

A Hybrid Lagrangian-Eulerian Particle Model for Ecosystem Simulation

Pengfei Xue, David J. Schwab, Xing Zhou, Chenfu Huang, Ryan Kibler, Xinyu Ye

Subject: Environmental And Earth Sciences, Oceanography Keywords: property-carrying particle model; ecosystem simulation; biophysical modeling; sandusky bay; great lakes

Online: 17 August 2018 (03:37:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0276.v1

Impact of Major Typhoons on Sea Surface Environment in the Northwestern Pacific Derived from Satellite Remote Sensing

Dan Song, Linghui Guo, Zhigang Duan, Lulu Xiang

Subject: Environmental And Earth Sciences, Oceanography Keywords: typhoon; sea surface temperature; sea surface height anomaly; sea surface cooling; warm eddy; cold eddy

Online: 15 August 2018 (15:41:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0246.v1

A Hybrid Lagrangian-Eulerian Particle Model for Ecosystem Simulation

Pengfei Xue, David J. Schwab, Xing Zhou, Chenfu Huang, Ryan Kibler, Xinyu Ye

Subject: Environmental And Earth Sciences, Oceanography Keywords: particle model; hydrodynamic model; ecosystem modeling

Online: 14 August 2018 (06:00:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201807.0181.v1

SMAP and CalCOFI Observe Freshening During the 2014-2016 Northeast Pacific Warm Anomaly

Jorge Vazquez, Jose Gomez-Valdes

Subject: Environmental And Earth Sciences, Oceanography Keywords: Salinity; Coastal; Upwelling; Validation

Online: 10 July 2018 (13:41:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201806.0486.v1

Spatial Environmental Assessment Tool (SEAT): A Modeling Tool to Evaluate Potential Environmental Risks Associated with Wave Energy Converter Deployments

Craig Jones, Grace Chang, Kaustubha Raghukumar, Samuel McWilliams, Ann Dallman, Jesse Roberts

Subject: Environmental And Earth Sciences, Oceanography Keywords: marine renewable energy; ocean energy; wave energy; environmental effects; wave modeling; wave propagation; numerical modeling; sediment dynamics; risk assessment

Online: 29 June 2018 (13:09:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201806.0242.v1

Exposing the Fundamental Role of Spectral Scattering in the PFT Signal

Lisl Robertson Lain, Stewart Bernard

Subject: Environmental And Earth Sciences, Oceanography Keywords: phytoplankton; PFT; ocean colour; satellite radiometry; radiative transfer; optical modelling

Online: 14 June 2018 (16:36:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201806.0030.v1

Estimating the Speed of Icegoing Ships by Integrating SAR Imagery and Ship Data From Automatic Identification System

Markku Simila, Mikko Lensu

Subject: Environmental And Earth Sciences, Oceanography Keywords: synthetic aperture radar; automatic identification system; ice thickness; regression

Online: 4 June 2018 (10:28:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0134.v1

Simulation of the Arctic – North Atlantic Ocean Circulation with a Two-Equation k-omega Turbulence Parameterization

Sergey Moshonkin, Vladimir Zalesny, Anatoly Gusev

Subject: Environmental And Earth Sciences, Oceanography Keywords: ocean circulation; numerical modelling; turbulence parameterization

Online: 9 May 2018 (04:30:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0007.v1

Climate Change Impacts Assessment in Coastal Lagoons Using Available Modelling Tools

Bruno Primo, Fernanda Achete, Sarith Mahanama, Marcus Thatcher, Mark Hemer, Sutat Weesakui, Trang Duong

Subject: Environmental And Earth Sciences, Oceanography Keywords: water quality; hydrodynamics; flushing time; residence time; downscaling; stratification

Online: 1 May 2018 (11:22:55 CEST)

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Environmental and Earth Sciences