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Cirrus Heterogeneity Effects on Cloud Optical Properties Retrieved with an Optimal Estimation Method from MODIS VIS to TIR Channels.This study presents preliminary results on the effect of cirrus heterogeneities on top-of-atmosphere (TOA) simulated radiances or reflectances for MODIS channels centered at 0.86, 2.21, 8.56, 11.01 and 12.03 micrometers , and on cloud optical properties retrieved with a research-level optimal estimation method (OEM). Synthetic cirrus cloud fields are generated using a 3D cloud generator (3DCLOUD) and radiances/reflectances are simulated using a 3D radiative transfer code (3DMCPOL). We find significant differences between the heterogeneity effects on either visible and near-infrared (VNIR) or thermal infrared (TIR) radiances. However, when both wavelength ranges are combined, heterogeneity effects are dominated by the VNIR horizontal radiative transport effect. As a result, small optical thicknesses are overestimated and large ones are underestimated. Retrieved effective diameter are found to be slightly affected, contrarily to retrievals using TIR channels only.
Document ID
20170004627
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Fauchez, T.
(Universities Space Research Association Columbia, MD, United States)
Platnick, S.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Meyer, K.
(Universities Space Research Association Columbia, MD, United States)
Sourdeval, O.
(Leipzig Univ. Germany)
Cornet, C.
(Lille-1 Univ. Villeneuve-d'Asoq, France)
Zhang, Z.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Szczap, F.
(Universite Blaise Pascal Clermont-Ferrand, France)
Date Acquired
May 18, 2017
Publication Date
April 16, 2016
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN37465
Meeting Information
Meeting: International Radiation Symposium (IRS 2016)
Location: Auckland
Country: New Zealand
Start Date: April 16, 2016
End Date: April 22, 2016
Sponsors: Auckland Univ.
Funding Number(s)
CONTRACT_GRANT: NNH15CO48B
CONTRACT_GRANT: NNG11HP16A
CONTRACT_GRANT: NNX10AT36A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
MODIS
remote sensing
cloud optical thickness
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