Evaluation of AMSR-E snow depth product over East Antarctic sea ice using in situ measurements and aerial photography

The Antarctic Remote Ice Sensing Experiment (ARISE) was conducted in the East Antarctic sea ice zone during September–October 2003. A key objective of this program was the acquisition of in situ measurements suitable for evaluating the EOS Aqua Advanced Microwave Scanning Radiometer (AMSR‐E) snow de...

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Bibliographic Details
Published in:	Journal of Geophysical Research - Oceans Vol. 113; no. C5; pp. C05S94 - n/a
Main Authors:	Worby, Anthony P., Markus, Thorsten, Steer, Adam D., Lytle, Victoria I., Massom, Robert A.
Format:	Journal Article
Language:	English
Published:	Washington, DC American Geophysical Union 01-05-2008 Blackwell Publishing Ltd
Subjects:	AMSR-E Antarctic sea ice Antarctica Cryosphere Earth sciences Earth, ocean, space Exact sciences and technology Geographic Location Marine Remote sensing Sea ice Snow Antarctic Ocean polar regions Antarctica AMSR-E Antarctic sea ice experimental studies microwaves satellites algorithms Lagrangian aerial photography Earth Observing System thickness trajectory in situ Drifting float depth roughness snow sea ice programs Rough sea strategy Pixel Radiometer
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Summary:	The Antarctic Remote Ice Sensing Experiment (ARISE) was conducted in the East Antarctic sea ice zone during September–October 2003. A key objective of this program was the acquisition of in situ measurements suitable for evaluating the EOS Aqua Advanced Microwave Scanning Radiometer (AMSR‐E) snow depth product. A strategy is presented for comparing snow thickness measurements over spatial scales ranging from point measurements to satellite pixels. In situ measurements of snow thickness were taken across eight Lagrangian grid cells defined and tracked using an array of drifting buoys. These data are coupled with ice‐type analyses from digital aerial photographs to calculate area‐averaged snow thicknesses that are compared with the AMSR‐E derived snow thickness product. The results show considerable underestimates of the AMSR‐E snow depths for rough sea ice by a factor of 2.3. We investigate the impact of underlying sea ice roughness on snow depth retrievals and conclude that in situ measurements of snow thickness underrepresent snow depth over rough ice, which is then not adequately accounted for in the development of the algorithm coefficients.
Bibliography:	ark:/67375/WNG-QRVS9WB4-K istex:B30C8300EE1BE06BB3D4B60D073923F0B6EFD2F0 ArticleID:2007JC004181 Tab-delimited Table 1.Tab-delimited Table 2. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0148-0227 2169-9275 2156-2202 2169-9291
DOI:	10.1029/2007JC004181