Surface freshening in the Arctic Ocean's Eurasian Basin: An apparent consequence of recent change in the wind‐driven circulation

摘要: [1] Data collected by an autonomous ice-based observatory that drifted into the Eurasian Basin between April and November 2010 indicate upper ocean was appreciably fresher than in 2007 2008. Sea ice snowmelt over course of drift amounted to input less 0.5 m liquid freshwater (comparable freshening melting estimated for those previous years), while observed change upper-ocean salinity melt period implies a gain about 0.7 m. Results wind-driven model corroborate observations suggest unusually fresh surface waters parts may have been due spreading anomalously water previously residing Beaufort Gyre. This flux is likely associated with 2009 shift large-scale atmospheric circulation significant reduction strength anticyclonic Gyre Transpolar Drift Stream.