Arctic sea ice conditions in spring 2009-2013 prior to melt

作者：Richter Menge Jacqueline A^*; Farrell Sinead L

来源：Geophysical Research Letters, 2013, 40(22): 5888-5893.

DOI：10.1002/2013GL058011

• sea ice thickness
• Arctic
• observations

Measurements from NASA IceBridge airborne surveys in March/April 2009-2013 over the western Arctic Ocean are presented in the context of previous observations to assess changes in the characteristics of the sea ice cover during the last decade, taking into account spatial and temporal limitations in the available data. Following a precipitous drop in the amount and thickness of multiyear (MY) ice in 2007-2008, the characteristics of the ice cover have remained largely consistent through March 2013. The central Arctic continues to be dominated by MY ice with mean and modal thicknesses of 3.2m and 2.4m, respectively. The southern Beaufort and Chukchi Sea region is a complex mixture of similar to 75% first-year ice and 25% MY ice. IceBridge observations indicate that the mean thickness in the Beaufort and Chukchi Seas may have decreased from similar to 2.5m to as low as 1.6m over the 5 year period.

• 出版日期2013-11-28