Satellite-observed drop of Arctic sea ice growth in winter 2015-2016
|Author(s)||Ricker Robert1, Hendricks Stefan2, Girard-Ardhuin Fanny1, Kaleschke Lars3, Lique Camille1, Tian-Kunze Xiangshan3, Nicolaus Marcel2, Krumpen Thomas2|
|Affiliation(s)||1 : Univ Brest, CNRS, LOPS, IRD,IUEM, Brest, France.
2 : Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, Bremerhaven, Germany.
3 : Univ Hamburg, Hamburg, Germany.
|Source||Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2017-04 , Vol. 44 , N. 7 , P. 3236-3245|
|WOS© Times Cited||37|
|Keyword(s)||Arctic sea ice, sea ice thickness, remote sensing, CryoSat-2, SMOS, sea ice growth|
An anomalous warm winter 2015–2016 lead to the lowest winter ice extent and highlights the sensitivity of the Arctic sea ice. Here we use the 6 year record of an improved sea ice thickness product retrieved from data fusion of CryoSat-2 radar altimetry and Soil Moisture and Ocean Salinity radiometry measurements to examine the impact of recent temperature trend on the Arctic ice mass balance. Between November 2015 and March 2016, we find a consistent drop of cumulative freezing degree days across the Arctic, with a negative peak anomaly of about 1000 degree days in the Barents Sea, coinciding with an Arctic-wide average thinning of 10 cm in March with respect to the 6 year average. In particular, the loss of ice volume is associated with a significant decline of March first-year ice volume by 13%. This reveals that due to the loss of multiyear ice during previous years, the Arctic ice cover becomes more sensitive to climate anomalies.