抄録
Wavelet analysis of DMSP (Defense Meteorological Satellite Program) SSM/I (Special Sensor
Microwave/Imager) 85GHz data from October of 1992 to March of 1993 is used to obtain daily
sea ice drift information for the Arctic region. The derived maps of sea ice drift provide both
improved spatial coverage over the existing array of Arctic Ocean buoys and better temporal
resolution over techniques utilizing satellite data from SAR (Synthetic Aperture Radar). Com
parisons of the derived ice velocities from SSM/I with ice velocities derived from buoys show
good quantitative agreement. Therefore, the ice velocities derived from the wavelet analysis of
SSM/I are suitable for validation of the ice velocities derived from an ice-ocean interaction model
and for data assimilation input to a model. For demonstration purposes, the ice velocities from
SSM/I are compared with the ice velocities derived from a coupled Arctic ice-ocean system with
the comparison revealing the similarities of the general circulation patterns and significant ice
velocity differences between the two. These results indicate where the model results need to be
improved; with the expectation that the data assimilation of the model with ice velocities derived
from SSM/I data would improve the model results. This wavelet analysis procedure is robust and
can make a major contribution to the understanding of ice motion over large areas at relatively
high temporal resolutions and would help to improve our current knowledge of sea ice drift and
related processes through the data assimilation of ice-ocean numerical modeling.
