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Spatial Variability of Barrow-Area Shore-Fast Sea Ice and Its Relationships to Passive Microwave EmissivityAircraft-acquired passive microwave data, laser radar height observations, RADARSAT synthetic aperture radar imagery, and in situ measurements obtained during the AMSR-Ice03 experiment are used to investigate relationships between microwave emission and ice characteristics over several space scales. The data fusion allows delineation of the shore-fast ice and pack ice in the Barrow area, AK, into several ice classes. Results show good agreement between observed and Polarimetric Scanning Radiometer (PSR)-derived snow depths over relatively smooth ice, with larger differences over ridged and rubbled ice. The PSR results are consistent with the effects on snow depth of the spatial distribution and nature of ice roughness, ridging, and other factors such as ice age. Apparent relationships exist between ice roughness and the degree of depolarization of emission at 10,19, and 37 GHz. This depolarization .would yield overestimates of total ice concentration using polarization-based algorithms, with indications of this seen when the NT-2 algorithm is applied to the PSR data. Other characteristics of the microwave data, such as effects of grounding of sea ice and large contrast between sea ice and adjacent land, are also apparent in the PSR data. Overall, the results further demonstrate the importance of macroscale ice roughness conditions such as ridging and rubbling on snow depth and microwave emissivity.
Document ID
20070021400
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Maslanik, J. A.
(Colorado Univ. Boulder, CO, United States)
Rivas, M. Belmonte
(Colorado Univ. Boulder, CO, United States)
Holmgren, J.
(Army Cold Regions Research and Engineering Lab. Fairbanks, AK, United States)
Gasiewski, A. J.
(Colorado Univ. Boulder, CO, United States)
Heinrichs, J. F.
(Fort Hayes State Univ. Fort Hays, KS, United States)
Stroeve, J. C.
(Colorado Univ. Boulder, CO, United States)
Klein, M.
(National Oceanic and Atmospheric Administration Boulder, CO, United States)
Markus, T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Perovich, D. K.
(Army Cold Regions Research and Engineering Lab. Hanover, NH, United States)
Sonntag, J. G.
(NASA Wallops Flight Center Wallops Island, VA, United States)
Tape, K.
(Alaska Univ. Fairbanks, AK, United States)
Date Acquired
August 23, 2013
Publication Date
November 1, 2006
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: 44
Issue: 11
ISSN: 0196-2892
Subject Category
Geosciences (General)
Funding Number(s)
CONTRACT_GRANT: NNG04GH68G
Distribution Limits
Public
Copyright
Other

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