Arctic Ocean basin liquid freshwater storage trend 1992–2012
Toole, John M.
Krishfield, Richard A.
MetadataShow full item record
Freshwater in the Arctic Ocean plays an important role in the regional ocean circulation, sea ice, and global climate. From salinity observed by a variety of platforms, we are able, for the first time, to estimate a statistically reliable liquid freshwater trend from monthly gridded fields over all upper Arctic Ocean basins. From 1992 to 2012 this trend was 600±300 km3 yr−1. A numerical model agrees very well with the observed freshwater changes. A decrease in salinity made up about two thirds of the freshwater trend and a thickening of the upper layer up to one third. The Arctic Ocean Oscillation index, a measure for the regional wind stress curl, correlated well with our freshwater time series. No clear relation to Arctic Oscillation or Arctic Dipole indices could be found. Following other observational studies, an increased Bering Strait freshwater import to the Arctic Ocean, a decreased Davis Strait export, and enhanced net sea ice melt could have played an important role in the freshwater trend we observed.
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 41 (2014): 961-968, doi:10.1002/2013GL058121.
Showing items related by title, author, creator and subject.
Liquid freshwater transport and Polar Surface Water characteristics in the East Greenland Current during the AO-02 Oden expedition Nilsson, Johan; Bjork, Goran; Rudels, Bert; Winsor, Peter; Torres, Daniel J. (2008-01-09)Dynamical features of the East Greenland Current (EGC) are synthesized from a survey conducted by the Swedish icebreaker Oden during the International Arctic Ocean - 02 expedition (AO-02) in May 2002 with emphasis on the ...
Liquid freshwater transport estimates from the East Greenland Current based on continuous measurements north of Denmark Strait de Steur, Laura; Pickart, Robert S.; Macrander, Andreas; Våge, Kjetil; Harden, Benjamin E.; Jónsson, Steingrímur; Østerhus, Svein; Valdimarsson, Hedinn (John Wiley & Sons, 2017-01-10)Liquid freshwater transports of the shelfbreak East Greenland Current (EGC) and the separated EGC are determined from mooring records from the Kögur section north of Denmark Strait between August 2011 and July 2012. The ...
Freshwater and its role in the Arctic Marine System : sources, disposition, storage, export, and physical and biogeochemical consequences in the Arctic and global oceans Carmack, Edward C.; Yamamoto-Kawai, Michiyo; Haine, Thomas W. N.; Bacon, Sheldon; Bluhm, Bodil; Lique, Camille; Melling, Humfrey; Polyakov, Igor V.; Straneo, Fiamma; Timmermans, Mary-Louise; Williams, William J. (John Wiley & Sons, 2016-03-30)The Arctic Ocean is a fundamental node in the global hydrological cycle and the ocean's thermohaline circulation. We here assess the system's key functions and processes: (1) the delivery of fresh and low-salinity waters ...