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

• Published in: Geophysical Research Letters
• Main Authors: Sarafanov, Artem, Falina, Anastasia, Mercier, Herlé, Lherminier, Pascale, Sokov, Alexey
• Other Authors: P.P. Shirshov Institute of Oceanology (SIO), Russian Academy of Sciences Moscow (RAS), Laboratoire de physique des océans (LPO), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2009
• Subjects: [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography; Greenland; Irminger Sea; Cape Farewell; East Greenland; Labrador Sea
• Online Access: https://hal.science/hal-00406698; https://hal.science/hal-00406698/document; https://hal.science/hal-00406698/file/Geophysical%20Research%20Letters%20-%202009%20-%20Sarafanov%20-%20Recent%20changes%20in%20the%20Greenland%20Scotland%20overflow%25u2010derived%20water%20transport.pdf; https://doi.org/10.1029/2009GL038385

International audience 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 ∼2 Sv (significant at the 99.9% level), which constitute ∼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.