Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Atmospheric Aerosol Over Western Greece - Six Years of Aerosol Observations at the Navarino Environmental Observatory

Version 1 : Received: 5 February 2021 / Approved: 8 February 2021 / Online: 8 February 2021 (10:56:35 CET)

How to cite: Hansson, H.; Tunved, P.; Krejci, R.; Freud, E.; Kalivitis, N.; Hennig, T.; Maneas, G.; Gerasopoulos, E. The Atmospheric Aerosol Over Western Greece - Six Years of Aerosol Observations at the Navarino Environmental Observatory. Preprints 2021, 2021020185 (doi: 10.20944/preprints202102.0185.v1). Hansson, H.; Tunved, P.; Krejci, R.; Freud, E.; Kalivitis, N.; Hennig, T.; Maneas, G.; Gerasopoulos, E. The Atmospheric Aerosol Over Western Greece - Six Years of Aerosol Observations at the Navarino Environmental Observatory. Preprints 2021, 2021020185 (doi: 10.20944/preprints202102.0185.v1).

Abstract

The Eastern Mediterranean is a highly populated area with air quality problems as well where climate change already is noticed by higher temperatures and changing precipitation pattern. The anthropogenic aerosol affects health and changing concentra-tions and properties of the atmospheric aerosol affect radiation balance and clouds. Continuous long-term observations are essential in assessing the influence of anthro-pogenic aerosols on climate and health. We present 6 years of observations from Navarino Environmental Observatory (NEO), a new station located at the south west tip of Pelo-ponnese, Greece. The two sites at NEO, were evaluated to show the influence of the local meteorology but also to assess the general background aerosol possible. It was found that the background aerosol was originated from aged European aerosols and was strongly influenced by biomass burning, fossil fuel combustion, and industry. When subsiding into the boundary layer, local sources contributed in the air masses moving south. Mesoscale meteorology determined the diurnal variation of aerosol properties such as mass and number by means of typical sea breeze circulation, giving rise to pronounced morning and evening peaks in pollutant levels. While synoptic scale meteorology, mainly large-scale air mass transport and precipitation, strongly influenced the season-ality of the aerosol properties.

Subject Areas

atmosphere; aerosol; background; particle size; long term; Mediterranean

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