We thank Ian Allison, leader of the Glaciology Section of the Australian Antarctic Division, for sponsoring this project and for his support as voyage leader in 2000. We thank Martin Betts, the voyage leader in both 1988 and 1996, and the crews of Icebird, Aurora Australis, and Polar Bird, for arranging logistics and assisting our project. SGW, REB, and TCG acknowledge the hospitality of the Cooperative Research Centre for Antarctic and Southern Ocean Studies during preparation for fieldwork at the University of Tasmania. Kelvin Michael, Collin Roesler, and Melanie Fitzpatrick assisted with the fieldwork, and many sea ice observers have contributed to the data contained within the ASPeCt data archive. We benefited from discussions with Collin Roesler and Thorsten Markus. The research was supported by the Australian Antarctic Division and by Grants OPP-95-27245 and OPP-98-15156 from the U.S. National Science Foundation.
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