Arctic sea ice extent and melt onset from NSCAT observations

Details Arctic sea ice extent and melt onset from NSCAT observations Arctic sea ice extent and melt onset from NSCAT observations

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.4369y&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 23, p. 4369-4372

Physics

6

Oceanography: General: Arctic And Antarctic Oceanography, Oceanography: Physical: Ice Mechanics And Air/Sea/Ice Exchange Processes, Oceanography: Physical: Instruments And Techniques

Scientific paper

NSCAT Ku-band microwave observations of the Arctic sea ice cover are described on their potential use for estimating ice extent and timing of spring melt. A simple comparative analysis of the NSCAT Arctic sea ice extent and high-resolution Radarsat imagery suggests that the SSM/I 25% ice concentration contour appears to be a good indicator of the winter Arctic ice edge. For spring melt-onset, a comparative study of NSCAT sea ice observations and NCEP/NCAR surface air temperature indicates that Ku-band backscatter of the snow cover over multiyear ice has a clear and steep change as the surface air temperature rises above freezing. This signature of melt onset should provide useful large-scale estimates of the dates of melt onset with spaceborne scatterometer data. A more extensive validation of the potential of this dataset is suggested.

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