The authors thank Richard Moritz, Drew Rothrock, David W. Thompson, Alan Thorndike, Jinlun Zhang, and countless others for the long discussions and guidance they provided on this project. This research is funded by the United States Interagency Buoy Program (USIABP) through the U.S. Navy–NOAA National Ice Center, ONR Contract N00014-96-C-0185, and by the NASA EOS program Polar Exchange at the Sea Surface, Grant NAGW-2407.
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