Recent changes in the Greenland-Scotland overflow-derived water transport inferred from hydrographic observations in the southern Irminger Sea

Type Publication
Date 2009-07
Language English
Copyright 2009. American Geophysical Union. All Rights Reserved
Author(s) Sarafanov Artem1, Falina Anastasia1, Mercier HerleORCID2, Lherminier PascaleORCID2, Sokov Alexey1
Affiliation(s) 1 : PP Shirshov Oceanol Inst, Moscow 117997, Russia.
2 : CNRS, UBO, IRD,Lab Phys Oceans, IFREMER,UMR 6523, F-29280 Plouzane, France.
Source Geophysical Research Letters ( GRL ) (0094-8276) (American Geophysical Union), 2009-07 , Vol. 36 , N. L13606 , P. 1-6
DOI 10.1029/2009GL038385
WOS© Times Cited 18
Abstract Recent decadal changes (1955-2007) in the baroclinic transport (TBC) of the Deep Western Boundary Current (DWBC) carrying the Greenland-Scotland overflow-derived waters along the East Greenland slope are quantified from a set of hydrographic sections in vicinity of Cape Farewell. The updated historical record of TBC shows clear decadal variability (+/- 2-2.5 Sv) with the transport minima in the 1950s and mid-1990s, maximum in the early 1980s and moderate-to-high transport in the 2000s. Since the mid-1990s, the DWBC TBC has increased by similar to 2 Sv (significant at the 99.9% level), which constitute similar to 20% of the mean absolute transport (9.0 Sv) as obtained from three cruises in 2002-2006. The DWBC TBC anomalies negatively correlate (R = -0.80) with thickness anomalies of the Labrador Sea Water (LSW) at its origin implying a close association, albeit not necessarily causative, between the DWBC transport east of Greenland and the LSW production.
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Sarafanov Artem, Falina Anastasia, Mercier Herle, Lherminier Pascale, Sokov Alexey (2009). Recent changes in the Greenland-Scotland overflow-derived water transport inferred from hydrographic observations in the southern Irminger Sea. Geophysical Research Letters ( GRL ), 36(L13606), 1-6. Publisher's official version : http://doi.org/10.1029/2009GL038385 , Open Access version : http://archimer.ifremer.fr/doc/00000/6633/