Trends in aerosol optical properties over Eastern Europe based on MODIS-Aqua
| Autor: | Haowen Yan, Mikalai Filonchyk, Volha Hurynovich |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Pollution
Angstrom exponent 010504 meteorology & atmospheric sciences media_common.quotation_subject Mean value lcsh:QE1-996.5 Eastern Europe 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Aerosol optical depth Aerosol AERONET lcsh:Geology MODIS Regional studies General Earth and Planetary Sciences Environmental science Moderate-resolution imaging spectroradiometer Aerosol-type classification Air quality index 0105 earth and related environmental sciences media_common |
| Zdroj: | Geoscience Frontiers, Vol 11, Iss 6, Pp 2169-2181 (2020) |
| ISSN: | 1674-9871 |
| Popis: | This study provides characteristics of aerosol columnar properties, measured over ten countries in Eastern Europe from 2002 to 2019. Aerosol optical depth (AOD) and Angstrom exponent (AE) were obtained with the Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6.1 merged Dark Target and Deep Blue aerosol product. The product is validated using ground-based Aerosol Robotic Network (AERONET) situated at Minsk, Belsk, Moldova and Kyiv. The results showed that 76.15% of retrieved AOD data are within the expected error. It was established that 64.2% of AOD points are between 0 and 0.2 and 79.3% of all AE points are over 1. Mean AOD values in the region vary from 0.130 ± 0.04 (Moldova) to 0.193 ± 0.03 (Czech Republic) with mean value in the region 0.162 ± 0.05. Seasonal mean AOD (AE) values were at the maximum during the summer from 0.231 ± 0.05 (1.482 ± 0.09 in winter) to minimum 0.087 ± 0.04 during the winter (1.363 ± 0.17 in summer). Gradual AOD reduction is observed in all countries with annual trend from −0.0050 (Belarus) to −0.0029 (Russia). Finally, the relationship between AOD and AE was studied to classify various aerosol types and showed seasonal non-uniformity of their contribution depending on variation in sources. The entire region is under significant impact of various aerosol types, including clean continental (СС), mixed (MX) and anthropogenic/burning (AB) aerosols types that are at 59.77%, 24.72%, and 12.97% respectively. These results form an important basis for further regional studies of air quality and distribution of sources of pollution. |
| Databáze: | OpenAIRE |
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