Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product
Characterizing the way satellite-based aerosol statistics change near clouds is important for better understanding both aerosol-cloud interactions and aerosol direct radiative forcing. This study focuses on the question of whether the observed near-cloud increases in aerosol optical thickness and pa...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20150007970 2023-05-15T17:41:29+02:00 Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product Varnai, Tamas Marshak, Alexander Unclassified, Unlimited, Publicly available April 27, 2015 application/pdf http://hdl.handle.net/2060/20150007970 unknown Document ID: 20150007970 http://hdl.handle.net/2060/20150007970 Copyright, Public use permitted CASI Earth Resources and Remote Sensing GSFC-E-DAA-TN20831 Remote Sensing (e-ISSN 2072-4292); 7; 5; 5283-5299 2015 ftnasantrs 2019-07-21T08:05:28Z Characterizing the way satellite-based aerosol statistics change near clouds is important for better understanding both aerosol-cloud interactions and aerosol direct radiative forcing. This study focuses on the question of whether the observed near-cloud increases in aerosol optical thickness and particle size may be explained by a combination of two factors: (i) Near-cloud data coming from areas with higher cloud fractions than far-from-cloud data and (ii) Cloud fraction being correlated with aerosol optical thickness and particle size. This question is addressed through a statistical analysis of aerosol parameters included in the MODIS (MODerate resolution Imaging Spectroradiometer) ocean color product. Results from ten Septembers (2002-2011) over part of the northeast Atlantic Ocean confirm that the combination of these two factors working together explains a significant but not dominant part (in our case, 15%-30%) of mean optical thickness changes near clouds. Overall, the findings show that cloud fraction plays a large role in shaping the way aerosol statistics change with distance to clouds. This implies that both cloud fraction and distance to clouds are important to consider when aerosol-cloud interactions or aerosol direct radiative effects are examined in satellite or modeling studies. Other/Unknown Material Northeast Atlantic NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Varnai, Tamas Marshak, Alexander Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
topic_facet |
Earth Resources and Remote Sensing |
description |
Characterizing the way satellite-based aerosol statistics change near clouds is important for better understanding both aerosol-cloud interactions and aerosol direct radiative forcing. This study focuses on the question of whether the observed near-cloud increases in aerosol optical thickness and particle size may be explained by a combination of two factors: (i) Near-cloud data coming from areas with higher cloud fractions than far-from-cloud data and (ii) Cloud fraction being correlated with aerosol optical thickness and particle size. This question is addressed through a statistical analysis of aerosol parameters included in the MODIS (MODerate resolution Imaging Spectroradiometer) ocean color product. Results from ten Septembers (2002-2011) over part of the northeast Atlantic Ocean confirm that the combination of these two factors working together explains a significant but not dominant part (in our case, 15%-30%) of mean optical thickness changes near clouds. Overall, the findings show that cloud fraction plays a large role in shaping the way aerosol statistics change with distance to clouds. This implies that both cloud fraction and distance to clouds are important to consider when aerosol-cloud interactions or aerosol direct radiative effects are examined in satellite or modeling studies. |
format |
Other/Unknown Material |
author |
Varnai, Tamas Marshak, Alexander |
author_facet |
Varnai, Tamas Marshak, Alexander |
author_sort |
Varnai, Tamas |
title |
Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
title_short |
Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
title_full |
Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
title_fullStr |
Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
title_full_unstemmed |
Effect of Cloud Fraction on Near-Cloud Aerosol Behavior in the MODIS Atmospheric Correction Ocean Color Product |
title_sort |
effect of cloud fraction on near-cloud aerosol behavior in the modis atmospheric correction ocean color product |
publishDate |
2015 |
url |
http://hdl.handle.net/2060/20150007970 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
CASI |
op_relation |
Document ID: 20150007970 http://hdl.handle.net/2060/20150007970 |
op_rights |
Copyright, Public use permitted |
_version_ |
1766143079872462848 |