Freshwater composition of the waters off southeast Greenland and their link to the Arctic Ocean


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dc.contributor.author Sutherland, David A.
dc.contributor.author Pickart, Robert S.
dc.contributor.author Jones, E. Peter
dc.contributor.author Azetsu-Scott, Kumiko
dc.contributor.author Eert, A. Jane
dc.contributor.author Olafsson, Jon
dc.date.accessioned 2010-07-12T18:12:54Z
dc.date.available 2010-07-12T18:12:54Z
dc.date.issued 2009-05-27
dc.identifier.citation Journal of Geophysical Research 114 (2009): C05020 en_US
dc.identifier.uri http://hdl.handle.net/1912/3735
dc.description Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 114 (2009): C05020, doi:10.1029/2008JC004808. en_US
dc.description.abstract The freshwater composition of waters on the southeast Greenland shelf and slope are described using a set of high-resolution transects occupied in summer 2004, which included hydrographic, velocity, nutrient, and chemical tracer measurements. The nutrient and tracer data are used to quantify the fractions of Pacific Water, sea ice melt, and meteoric water present in the upper layers of the East Greenland Current (EGC) and East Greenland Coastal Current (EGCC). The EGC/EGCC system dominates the circulation of this region and strongly influences the observed distribution of the three freshwater types. Sea ice melt and meteoric water fractions are surface intensified, reflecting their sources, and generally increase southward from Denmark Strait to Cape Farewell, as well as shoreward. Significant fractions of Pacific Water are found in the subsurface layers of the EGCC, supporting the idea that this inner shelf branch is directly linked to the EGC and thus to the Arctic Ocean. A set of historical sections is examined to investigate the variability of Pacific Water content in the EGC and EGCC from 1984 to 2004 in the vicinity of Denmark Strait. The fraction of Pacific Water increased substantially in the late 1990s and subsequently declined to low levels in 2002 and 2004, mirroring the reduction in Pacific Water content reported previously at Fram Strait. This variability is found to correlate significantly with the Arctic Oscillation index, lagged by 9 years, suggesting that the Arctic Ocean circulation patterns bring varying amounts of Pacific Water to the North Atlantic via the EGC/EGCC. en_US
dc.description.sponsorship This work was funded by National Science Foundation grant OCE- 0450658. D. Sutherland also received support from the Woods Hole Oceanographic Institution Academic Programs Office. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2008JC004808
dc.subject Pacific Water en_US
dc.subject East Greenland current en_US
dc.subject Arctic Oscillation en_US
dc.subject Freshwater composition en_US
dc.subject Cape Farewell en_US
dc.subject Denmark Strait en_US
dc.title Freshwater composition of the waters off southeast Greenland and their link to the Arctic Ocean en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2008JC004808

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