Observation of sea ice properties with the Nimbus-7 SMMRTechniques for treating Nimbus-7 scanning multispectral microwave radiometer (SMMR) data to retrieve information on sea ice parameters are discussed. The SMMR produces information on ice concentration, temperature, multiyear ice fraction, thin ice fraction, difference between thin and thick ice temperatures, and atmospheric opacity. Sea ice emissivities as determined from ground truth and Nimbus-7 SMMR observations are provided, noting the necessity to further characterize the values with a larger data base. It was found that longest wavelengths displayed the largest contrast between open water and sea. Ice emissivity polarization differences are no more than 0.15 at any wavelength, while water polarizations are never less than 0.52. Ice emissivity increases directly with wavelength, and water emissivity increases inversely. Algorithmic representations of SMMR data to retrieve sea ice parameters are described.
Document ID
19830028790
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Cavalieri, D. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gloersen, P. (NASA Goddard Space Flight Center Laboratory for Atmospheric Sciences, Greenbelt, MD, United States)
Campbell, W. J. (U.S. Geological Survey; Puget Sound, University Tacoma, WA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Oceanography
Meeting Information
Meeting: International Geoscience and Remote Sensing Symposium