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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ftunivhelsihelda:oai:helda.helsinki.fi:10138/179104 2024-01-07T09:43:09+01:00 Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations Saponaro, Giulia Kolmonen, Pekka Sogacheva, Larisa Rodriguez, Edith Virtanen, Timo De Leeuw, Gerrit Department of Physics 2017-04-10T07:12:02Z 11 application/pdf http://hdl.handle.net/10138/179104 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/acp-17-3133-2017 This research was funded by the Maj and Tor Nessling Foundation (grant no. 201600287). The authors also acknowledge the Academy of Finland Centre of Excellence (grant no. 272041). Saponaro , G , Kolmonen , P , Sogacheva , L , Rodriguez , E , Virtanen , T & De Leeuw , G 2017 , ' Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations ' , Atmospheric Chemistry and Physics , vol. 17 , no. 4 , pp. 3133-3143 . https://doi.org/10.5194/acp-17-3133-2017 , https://doi.org/10.5194/acp-17-3133-2017 ORCID: /0000-0002-8752-9104/work/61110830 85014143520 02a87273-c85c-4963-8581-7e90abf065f3 http://hdl.handle.net/10138/179104 000395147600008 cc_by openAccess info:eu-repo/semantics/openAccess SATELLITE DATA CONVECTIVE CLOUDS PRODUCTS LAND REFLECTANCE PARAMETERS RETRIEVAL SITE 114 Physical sciences Article publishedVersion 2017 ftunivhelsihelda 2023-12-14T00:06:37Z 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), Angstrom 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. Peer reviewed Article in Journal/Newspaper Fennoscandia HELDA – University of Helsinki Open Repository Atmospheric Chemistry and Physics 17 4 3133 3143 |
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Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
SATELLITE DATA CONVECTIVE CLOUDS PRODUCTS LAND REFLECTANCE PARAMETERS RETRIEVAL SITE 114 Physical sciences |
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SATELLITE DATA CONVECTIVE CLOUDS PRODUCTS LAND REFLECTANCE PARAMETERS RETRIEVAL SITE 114 Physical sciences Saponaro, Giulia Kolmonen, Pekka Sogacheva, Larisa Rodriguez, Edith Virtanen, Timo De Leeuw, Gerrit Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations |
topic_facet |
SATELLITE DATA CONVECTIVE CLOUDS PRODUCTS LAND REFLECTANCE PARAMETERS RETRIEVAL SITE 114 Physical sciences |
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), Angstrom 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. Peer reviewed |
author2 |
Department of Physics |
format |
Article in Journal/Newspaper |
author |
Saponaro, Giulia Kolmonen, Pekka Sogacheva, Larisa Rodriguez, Edith Virtanen, Timo De Leeuw, Gerrit |
author_facet |
Saponaro, Giulia Kolmonen, Pekka Sogacheva, Larisa Rodriguez, Edith Virtanen, Timo De Leeuw, Gerrit |
author_sort |
Saponaro, Giulia |
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 GESELLSCHAFT MBH |
publishDate |
2017 |
url |
http://hdl.handle.net/10138/179104 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
10.5194/acp-17-3133-2017 This research was funded by the Maj and Tor Nessling Foundation (grant no. 201600287). The authors also acknowledge the Academy of Finland Centre of Excellence (grant no. 272041). Saponaro , G , Kolmonen , P , Sogacheva , L , Rodriguez , E , Virtanen , T & De Leeuw , G 2017 , ' Estimates of the aerosol indirect effect over the Baltic Sea region derived from 12 years of MODIS observations ' , Atmospheric Chemistry and Physics , vol. 17 , no. 4 , pp. 3133-3143 . https://doi.org/10.5194/acp-17-3133-2017 , https://doi.org/10.5194/acp-17-3133-2017 ORCID: /0000-0002-8752-9104/work/61110830 85014143520 02a87273-c85c-4963-8581-7e90abf065f3 http://hdl.handle.net/10138/179104 000395147600008 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
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Atmospheric Chemistry and Physics |
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17 |
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4 |
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3133 |
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3143 |
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1787424403685900288 |