Accession Number:

ADA257132

Title:

Investigation of Antarctic Sea Ice Concentration by Means of Selected Algorithms

Descriptive Note:

Final rept. 1991-1992

Corporate Author:

NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s):

Report Date:

1992-05-08

Pagination or Media Count:

102.0

Abstract:

Changes in areal extent and concentration of sea ice around Antarctica may serve as sensitive indicators of global warming. A comparison study was conducted between the outputs of the three main algorithms currently in use NASA Team, Comisco, and NORSEX and a sea-ice model Fine Resolution Antarctic Model. Data from the DMSP Special Sensor MicrowaveImager SSMI were used as input algorithms for the time frame July, 1987 to June, 1990. Large disparities are apparent when comparing the NASA algorithm with the Comisco and NORSEX algorithms. Very large differences, some higher than 30 per cent, exist in the marginal ice zones, along the coast, and in the Weddell and Ross Seas Heat fluxes through recurring polynyas were calculated to quantify further differences in the algorithms however, no conclusive patterns were apparent. No significant change in the extent or area of the ice pack occurred from July, 1987 through June, 1990. Antarctic Ocean, Antarctic regions, Global warming, Sea ice-Antarctic regions.

Subject Categories:

  • Snow, Ice and Permafrost
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE