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During the last decade, considerable progress has been made in the application of passive microwave remote sensing to the study of sea ice. With the December 1972 launch of the Nimbus 5 electrically scanning microwave radiometer (ESMR‐5), complete coverage of the polar regions provided the synoptic observations needed for undertaking a detailed study of global sea ice variability for the first time. The ESMR‐5 data have been used successfully to document sea ice changes in both hemispheres and to associate these changes with atmospheric and oceanic influences Zwally et al., 1983; Parkinson et al., 1985.
Swift et al. (Tue,) studied this question.
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