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Satellite-based Evidence of Wavelength-dependent Aerosol Absorption in Biomass Burning Smoke Inferred from Ozone Monitoring Instrument : Volume 11, Issue 3 (02/03/2011)

By Jethva, H.

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Book Id: WPLBN0003995950
Format Type: PDF Article :
File Size: Pages 29
Reproduction Date: 2015

Title: Satellite-based Evidence of Wavelength-dependent Aerosol Absorption in Biomass Burning Smoke Inferred from Ozone Monitoring Instrument : Volume 11, Issue 3 (02/03/2011)  
Author: Jethva, H.
Volume: Vol. 11, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Torres, O., & Jethva, H. (2011). Satellite-based Evidence of Wavelength-dependent Aerosol Absorption in Biomass Burning Smoke Inferred from Ozone Monitoring Instrument : Volume 11, Issue 3 (02/03/2011). Retrieved from

Description: Department of Atmospheric & Planetary Sciences, Hampton University, Hampton, VA 23668, USA. We provide satellite-based evidence of the spectral dependence of absorption in biomass burning aerosols over South America using near-UV measurements made by Ozone Monitoring Instrument (OMI) during 2005–2007. Currently, OMAERUV aerosol algorithm characterizes carbonaceous aerosol as gray aerosol, meaning no wavelength dependence in aerosol absorption. With this assumption, OMI-derived aerosol optical depth (AOD) is found to be over-estimated significantly compared to that of AERONET at several sites during intense biomass burning events (August–September). The assumption on height of aerosols and other parameters seem to be reasonable and unable to explain large discrepancy in the retrieval. The specific ground-based studies have revealed strong spectral dependence in aerosol absorption in the near-UV region that indicates the presence of organic carbon. A new set of OMI aerosol retrieval with assumed wavelength-dependent aerosol absorption in the near-UV region (Absorption Angstrom Exponent Λ−2.5 to −3.0) provided much improved retrieval of AOD with significantly reduced bias. Also, the new retrieval of single-scattering albedo is in better agreement with those of AERONET within the uncertainties (ΔΩ=±0.03). The new smoke aerosol model was also found to be valid over the biomass burning region of central Africa and northern India. Together with suggesting vast improvement in the retrieval of aerosol properties from OMI, present study demonstrates the near-UV capabilities of OMI in separating aerosols containing organics from pure black carbon through OMI-AERONET integrated measurements.

Satellite-based evidence of wavelength-dependent aerosol absorption in biomass burning smoke inferred from ozone monitoring instrument

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