Version 1
: Received: 9 January 2024 / Approved: 9 January 2024 / Online: 9 January 2024 (15:17:54 CET)
How to cite:
Bonfim, O.T.; Ferreira, V.; Maroneze, R.; Valdes, R.H.; Mortarini, L. Characterizing the 2019-2021 Drought in Southern and Southeastern Brazil Using S-TRACK Method. Preprints2024, 2024010746. https://doi.org/10.20944/preprints202401.0746.v1
Bonfim, O.T.; Ferreira, V.; Maroneze, R.; Valdes, R.H.; Mortarini, L. Characterizing the 2019-2021 Drought in Southern and Southeastern Brazil Using S-TRACK Method. Preprints 2024, 2024010746. https://doi.org/10.20944/preprints202401.0746.v1
Bonfim, O.T.; Ferreira, V.; Maroneze, R.; Valdes, R.H.; Mortarini, L. Characterizing the 2019-2021 Drought in Southern and Southeastern Brazil Using S-TRACK Method. Preprints2024, 2024010746. https://doi.org/10.20944/preprints202401.0746.v1
APA Style
Bonfim, O.T., Ferreira, V., Maroneze, R., Valdes, R.H., & Mortarini, L. (2024). Characterizing the 2019-2021 Drought in Southern and Southeastern Brazil Using S-TRACK Method. Preprints. https://doi.org/10.20944/preprints202401.0746.v1
Chicago/Turabian Style
Bonfim, O.T., Roilan Hernández Valdes and Luca Mortarini. 2024 "Characterizing the 2019-2021 Drought in Southern and Southeastern Brazil Using S-TRACK Method" Preprints. https://doi.org/10.20944/preprints202401.0746.v1
Abstract
The period from 2019 to 2021 witnessed an enduring and severe drought that impacted southeast South America. Initially characterized as a meteorological drought, its influence later extended across the entire hydrological cycle. This paper explores the application of the S-TRACK method to monitor and characterize the 2019/21 drought in Southern Brazil (SB) and Southeast Brazil (SEB). Monthly precipitation data from reanalyses and satellites, alongside the Standardized Precipitation Index (SPI) for drought quantification, are utilized. Precipitation datasets, validated against rain gauge records, highlight ERA-5 and CHIRPS as having the highest correlation in both SB and SEB, with PERSIANN exhibiting a moderate correlation. The utilization of the S-TRACK method for spatial drought tracking revealed the temporal dynamics of the drought events, with three significant episodes occurring in 2020/2021. Initially, the onset of the drought was observed in the SB region, characterized by intensities ranging from moderate to extreme. Subsequently, the drought extended northward, reaching its maximum intensity at lower latitudes within the SEB region before either dissipating or experiencing a reduction in both its spatial extent and intensity. The prolonged presence of drought-affected areas in the same region over an extended period contributed significantly to the exacerbation of drought severity, particularly during the March to May trimester.
Keywords
Precipitation Deficit; Drought indexes; Spatial tracks; South America.
Subject
Environmental and Earth Sciences, Atmospheric Science and Meteorology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
