The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements
Atmospheric particulates are a significant forcing agent for the radiative energy budget of the Earth–atmosphere system. The particulates' interaction with radiation, which defines their climate effect, is strongly dependent on their optical properties. In the present work, we study one of the...
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ftdoajarticles:oai:doaj.org/article:afb331802f02431cb28dac6adc7dfbd5 2023-05-15T13:06:48+02:00 The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements M. B. Korras-Carraca N. Hatzianastassiou C. Matsoukas A. Gkikas C. D. Papadimas 2015-11-01T00:00:00Z https://doi.org/10.5194/acp-15-13113-2015 https://doaj.org/article/afb331802f02431cb28dac6adc7dfbd5 EN eng Copernicus Publications http://www.atmos-chem-phys.net/15/13113/2015/acp-15-13113-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-13113-2015 https://doaj.org/article/afb331802f02431cb28dac6adc7dfbd5 Atmospheric Chemistry and Physics, Vol 15, Iss 22, Pp 13113-13132 (2015) Physics QC1-999 Chemistry QD1-999 article 2015 ftdoajarticles https://doi.org/10.5194/acp-15-13113-2015 2022-12-30T22:34:01Z Atmospheric particulates are a significant forcing agent for the radiative energy budget of the Earth–atmosphere system. The particulates' interaction with radiation, which defines their climate effect, is strongly dependent on their optical properties. In the present work, we study one of the most important optical properties of aerosols, the asymmetry parameter ( g aer ), over sea surfaces of the region comprising North Africa, the Arabian Peninsula, Europe, and the Mediterranean Basin. These areas are of great interest, because of the variety of aerosol types they host, both anthropogenic and natural. Using satellite data from the collection 051 of MODIS (Moderate Resolution Imaging Spectroradiometer, Terra and Aqua), we investigate the spatiotemporal characteristics of the asymmetry parameter. We generally find significant spatial variability, with larger values over regions dominated by larger size particles, e.g., outside the Atlantic coasts of northwestern Africa, where desert-dust outflow takes place. The g aer values tend to decrease with increasing wavelength, especially over areas dominated by small particulates. The intra-annual variability is found to be small in desert-dust areas, with maximum values during summer, while in all other areas larger values are reported during the cold season and smaller during the warm. Significant intra-annual and inter-annual variability is observed around the Black Sea. However, the inter-annual trends of g aer are found to be generally small. Although satellite data have the advantage of broad geographical coverage, they have to be validated against reliable surface measurements. Therefore, we compare satellite-measured values with g aer values measured at 69 stations of the global surface AERONET (Aerosol Robotic Network), located within our region of interest. This way, we provide some insight on the quality and reliability of MODIS data. We report generally better agreement at the wavelength of 860 nm (correlation coefficient R up to 0.47), while at all ... Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Atmospheric Chemistry and Physics 15 22 13113 13132 |
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Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 M. B. Korras-Carraca N. Hatzianastassiou C. Matsoukas A. Gkikas C. D. Papadimas The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Atmospheric particulates are a significant forcing agent for the radiative energy budget of the Earth–atmosphere system. The particulates' interaction with radiation, which defines their climate effect, is strongly dependent on their optical properties. In the present work, we study one of the most important optical properties of aerosols, the asymmetry parameter ( g aer ), over sea surfaces of the region comprising North Africa, the Arabian Peninsula, Europe, and the Mediterranean Basin. These areas are of great interest, because of the variety of aerosol types they host, both anthropogenic and natural. Using satellite data from the collection 051 of MODIS (Moderate Resolution Imaging Spectroradiometer, Terra and Aqua), we investigate the spatiotemporal characteristics of the asymmetry parameter. We generally find significant spatial variability, with larger values over regions dominated by larger size particles, e.g., outside the Atlantic coasts of northwestern Africa, where desert-dust outflow takes place. The g aer values tend to decrease with increasing wavelength, especially over areas dominated by small particulates. The intra-annual variability is found to be small in desert-dust areas, with maximum values during summer, while in all other areas larger values are reported during the cold season and smaller during the warm. Significant intra-annual and inter-annual variability is observed around the Black Sea. However, the inter-annual trends of g aer are found to be generally small. Although satellite data have the advantage of broad geographical coverage, they have to be validated against reliable surface measurements. Therefore, we compare satellite-measured values with g aer values measured at 69 stations of the global surface AERONET (Aerosol Robotic Network), located within our region of interest. This way, we provide some insight on the quality and reliability of MODIS data. We report generally better agreement at the wavelength of 860 nm (correlation coefficient R up to 0.47), while at all ... |
format |
Article in Journal/Newspaper |
author |
M. B. Korras-Carraca N. Hatzianastassiou C. Matsoukas A. Gkikas C. D. Papadimas |
author_facet |
M. B. Korras-Carraca N. Hatzianastassiou C. Matsoukas A. Gkikas C. D. Papadimas |
author_sort |
M. B. Korras-Carraca |
title |
The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
title_short |
The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
title_full |
The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
title_fullStr |
The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
title_full_unstemmed |
The regime of aerosol asymmetry parameter over Europe, the Mediterranean and the Middle East based on MODIS satellite data: evaluation against surface AERONET measurements |
title_sort |
regime of aerosol asymmetry parameter over europe, the mediterranean and the middle east based on modis satellite data: evaluation against surface aeronet measurements |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/acp-15-13113-2015 https://doaj.org/article/afb331802f02431cb28dac6adc7dfbd5 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Atmospheric Chemistry and Physics, Vol 15, Iss 22, Pp 13113-13132 (2015) |
op_relation |
http://www.atmos-chem-phys.net/15/13113/2015/acp-15-13113-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-13113-2015 https://doaj.org/article/afb331802f02431cb28dac6adc7dfbd5 |
op_doi |
https://doi.org/10.5194/acp-15-13113-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
22 |
container_start_page |
13113 |
op_container_end_page |
13132 |
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1766021259950292992 |