Feb 28, 2013

CryoSat-2 estimates of Arctic sea ice thickness and volume

Laxon, Seymour W., Giles, Katharine A., Ridout, Andy L., Wingham, Duncan J., Willatt, Rosemary, Cullen, Robert, Kwok, Ron, Schweiger, Axel, Zhang, Jinlun, Haas, Christian, Hendricks, Stefan, Krishfield, Richard, Kurtz, Nathan et al
Geophysical Research Letters
  • States that satellite records show a decline in ice extent over more than three decades, with a record minimum in September 2012
  • Says that results from the Pan-Arctic Ice-Ocean Modelling and Assimilation system (PIOMAS) suggest that the decline in extent has been accompanied by a decline in volume, but this has not been confirmed by data
  • Uses new data from the European Space Agency CryoSat-2 (CS-2) mission, validated with in situ data, to generate estimates of ice volume for the winters of 2010/11 and 2011/12
  • Compares these data with current estimates from PIOMAS and earlier (2003–8) estimates from the National Aeronautics and Space Administration ICESat mission
  • Finds that between the ICESat and CryoSat-2 periods, the autumn volume declined by 4291 km3 and the winter volume by 1479 km3
  • States that this exceeds the decline in ice volume in the central Arctic from the PIOMAS model of 2644 km3 in the autumn, but is less than the 2091 km3 in winter, between the two time periods