Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations
Retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) on-board the Aqua satellite, 12 years (2003–2014) of aerosol and cloud properties were used to statistically quantify aerosol–cloud interaction (ACI) over the Baltic Sea region, including the relatively clean Fennoscandia and t...
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ftdoajarticles:oai:doaj.org/article:a136c97a1b7f43f394e54c9ce9685e21 2023-05-15T16:11:47+02:00 Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations G. Saponaro P. Kolmonen L. Sogacheva E. Rodriguez T. Virtanen G. de Leeuw 2017-02-01T00:00:00Z https://doi.org/10.5194/acp-17-3133-2017 https://doaj.org/article/a136c97a1b7f43f394e54c9ce9685e21 EN eng Copernicus Publications http://www.atmos-chem-phys.net/17/3133/2017/acp-17-3133-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3133-2017 https://doaj.org/article/a136c97a1b7f43f394e54c9ce9685e21 Atmospheric Chemistry and Physics, Vol 17, Iss 4, Pp 3133-3143 (2017) Physics QC1-999 Chemistry QD1-999 article 2017 ftdoajarticles https://doi.org/10.5194/acp-17-3133-2017 2022-12-31T15:55:38Z Retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) on-board the Aqua satellite, 12 years (2003–2014) of aerosol and cloud properties were used to statistically quantify aerosol–cloud interaction (ACI) over the Baltic Sea region, including the relatively clean Fennoscandia and the more polluted central–eastern Europe. These areas allowed us to study the effects of different aerosol types and concentrations on macro- and microphysical properties of clouds: cloud effective radius (CER), cloud fraction (CF), cloud optical thickness (COT), cloud liquid water path (LWP) and cloud-top height (CTH). Aerosol properties used are aerosol optical depth (AOD), Ångström exponent (AE) and aerosol index (AI). The study was limited to low-level water clouds in the summer. The vertical distributions of the relationships between cloud properties and aerosols show an effect of aerosols on low-level water clouds. CF, COT, LWP and CTH tend to increase with aerosol loading, indicating changes in the cloud structure, while the effective radius of cloud droplets decreases. The ACI is larger at relatively low cloud-top levels, between 900 and 700 hPa. Most of the studied cloud variables were unaffected by the lower-tropospheric stability (LTS), except for the cloud fraction. The spatial distribution of aerosol and cloud parameters and ACI, here defined as the change in CER as a function of aerosol concentration for a fixed LWP, shows positive and statistically significant ACI over the Baltic Sea and Fennoscandia, with the former having the largest values. Small negative ACI values are observed in central–eastern Europe, suggesting that large aerosol concentrations saturate the ACI. Article in Journal/Newspaper Fennoscandia Directory of Open Access Journals: DOAJ Articles Atmospheric Chemistry and Physics 17 4 3133 3143 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 G. Saponaro P. Kolmonen L. Sogacheva E. Rodriguez T. Virtanen G. de Leeuw Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) on-board the Aqua satellite, 12 years (2003–2014) of aerosol and cloud properties were used to statistically quantify aerosol–cloud interaction (ACI) over the Baltic Sea region, including the relatively clean Fennoscandia and the more polluted central–eastern Europe. These areas allowed us to study the effects of different aerosol types and concentrations on macro- and microphysical properties of clouds: cloud effective radius (CER), cloud fraction (CF), cloud optical thickness (COT), cloud liquid water path (LWP) and cloud-top height (CTH). Aerosol properties used are aerosol optical depth (AOD), Ångström exponent (AE) and aerosol index (AI). The study was limited to low-level water clouds in the summer. The vertical distributions of the relationships between cloud properties and aerosols show an effect of aerosols on low-level water clouds. CF, COT, LWP and CTH tend to increase with aerosol loading, indicating changes in the cloud structure, while the effective radius of cloud droplets decreases. The ACI is larger at relatively low cloud-top levels, between 900 and 700 hPa. Most of the studied cloud variables were unaffected by the lower-tropospheric stability (LTS), except for the cloud fraction. The spatial distribution of aerosol and cloud parameters and ACI, here defined as the change in CER as a function of aerosol concentration for a fixed LWP, shows positive and statistically significant ACI over the Baltic Sea and Fennoscandia, with the former having the largest values. Small negative ACI values are observed in central–eastern Europe, suggesting that large aerosol concentrations saturate the ACI. |
format |
Article in Journal/Newspaper |
author |
G. Saponaro P. Kolmonen L. Sogacheva E. Rodriguez T. Virtanen G. de Leeuw |
author_facet |
G. Saponaro P. Kolmonen L. Sogacheva E. Rodriguez T. Virtanen G. de Leeuw |
author_sort |
G. Saponaro |
title |
Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
title_short |
Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
title_full |
Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
title_fullStr |
Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
title_full_unstemmed |
Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
title_sort |
estimates of the aerosol indirect effect over the baltic sea region derived from 12 years of modis observations |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-3133-2017 https://doaj.org/article/a136c97a1b7f43f394e54c9ce9685e21 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Atmospheric Chemistry and Physics, Vol 17, Iss 4, Pp 3133-3143 (2017) |
op_relation |
http://www.atmos-chem-phys.net/17/3133/2017/acp-17-3133-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3133-2017 https://doaj.org/article/a136c97a1b7f43f394e54c9ce9685e21 |
op_doi |
https://doi.org/10.5194/acp-17-3133-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
4 |
container_start_page |
3133 |
op_container_end_page |
3143 |
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1765996979548061696 |