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Satellite Data Sets in the Polar RegionsWe have generated about two decades of consistently derived geophysical parameters in the polar regions. The key parameters are sea ice concentration, surface temperature, albedo, and cloud cover statistics. Sea ice concentrations were derived from the Scanning Multichannel Microwave Radiometer (SMMR) data and the Special Scanning Cl Microwave Imager (SSM/I) data from several platforms using the enhanced Bootstrap Algorithm for the period 1978 through 1999. The new algorithm reduces the errors associated with spatial and temporal variations in the emissivity and surface temperatures of sea ice. Also, bad data at ocean/land interfaces are identified and deleted in an unsupervised manner. Surface ice temperature, albedo and cloud cover statistics are derived simultaneously from the Advanced Very High Resolution Radiometer (AVHRR) data from 1981 through 1999 and mapped at a higher resolution but the same format as the ice concentration data. The technique makes use these co-registered ice concentration maps to enable cloud masking to be done separately for open ocean, sea ice and land areas. The effect of inversion is minimized by taking into consideration the expected changes in the effect of inversion with altitude, especially in the Antarctic. A technique for ice type regional classification has also been developed using multichannel cluster analysis and a neural network. This provide a means to identify large areas of thin ice, first year ice, and older ice types. The data sets have been shown to be coherent with each other and provide a powerful tool for in depth studies of the currently changing Arctic and Antarctic environment.
Document ID
20010028804
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Comiso, Josefino C.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Busalacchi, Antonio J.
Date Acquired
August 20, 2013
Publication Date
January 1, 2000
Subject Category
Communications And Radar
Meeting Information
Meeting: OPP/WCRP/ACSYS Workshop
Location: Geneva
Country: Switzerland
Start Date: October 4, 2000
End Date: October 8, 2000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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