Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds
The presence of absorbing aerosol layers above clouds is unambiguously detected by the TOMS/OMI UV Aerosol Index (AI) that uses satellite observations at two near-UV channels. A sensitivity study using radiative transfer calculations shows that the AI signal of resulting from the presence of aerosol...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20110013260 2023-05-15T18:21:02+02:00 Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds Jethva, Hiren Torres, Omar Bhartia, P. K. Unclassified, Unlimited, Publicly available April 2011 application/pdf http://hdl.handle.net/2060/20110013260 unknown Document ID: 20110013260 http://hdl.handle.net/2060/20110013260 Copyright, Distribution as joint owner in the copyright CASI Meteorology and Climatology GSFC.ABS.4421.2011 European Geosciences Union; 1-9 Apr. 2011; Vienna; Austria 2011 ftnasantrs 2019-07-21T01:02:13Z The presence of absorbing aerosol layers above clouds is unambiguously detected by the TOMS/OMI UV Aerosol Index (AI) that uses satellite observations at two near-UV channels. A sensitivity study using radiative transfer calculations shows that the AI signal of resulting from the presence of aerosols above clouds is mainly driven by the aerosol absorption optical depth and the optical depth of the underlying cloud. Based on these results, an inversion algorithm has been developed to retrieve the aerosol optical depth (AOD) of aerosol layers above clouds. In this presentation we will discuss the sensitivity analysis, describe the retrieval approach, and present results of applications of the retrieval method to OMI observations over the South Atlantic Ocean. Preliminary error analyses, to be discussed, indicate that the AOD can be underestimated (up to -30%) or overestimated (up to 60%) depending on algorithmic assumptions. Other/Unknown Material South Atlantic Ocean 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 |
language |
unknown |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Jethva, Hiren Torres, Omar Bhartia, P. K. Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
topic_facet |
Meteorology and Climatology |
description |
The presence of absorbing aerosol layers above clouds is unambiguously detected by the TOMS/OMI UV Aerosol Index (AI) that uses satellite observations at two near-UV channels. A sensitivity study using radiative transfer calculations shows that the AI signal of resulting from the presence of aerosols above clouds is mainly driven by the aerosol absorption optical depth and the optical depth of the underlying cloud. Based on these results, an inversion algorithm has been developed to retrieve the aerosol optical depth (AOD) of aerosol layers above clouds. In this presentation we will discuss the sensitivity analysis, describe the retrieval approach, and present results of applications of the retrieval method to OMI observations over the South Atlantic Ocean. Preliminary error analyses, to be discussed, indicate that the AOD can be underestimated (up to -30%) or overestimated (up to 60%) depending on algorithmic assumptions. |
format |
Other/Unknown Material |
author |
Jethva, Hiren Torres, Omar Bhartia, P. K. |
author_facet |
Jethva, Hiren Torres, Omar Bhartia, P. K. |
author_sort |
Jethva, Hiren |
title |
Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
title_short |
Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
title_full |
Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
title_fullStr |
Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
title_full_unstemmed |
Using OMI Observations to Measure Aerosol Absorption of Biomass Burning Aerosols Above Clouds |
title_sort |
using omi observations to measure aerosol absorption of biomass burning aerosols above clouds |
publishDate |
2011 |
url |
http://hdl.handle.net/2060/20110013260 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
CASI |
op_relation |
Document ID: 20110013260 http://hdl.handle.net/2060/20110013260 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766200059997716480 |