作者: Maribel I. García-Ibáñez , Paula C. Pardo , Lidia I. Carracedo , Herlé Mercier , Pascale Lherminier
DOI: 10.1016/J.POCEAN.2015.03.009
关键词: North Atlantic Deep Water 、 Ridge (meteorology) 、 Subarctic climate 、 Ocean gyre 、 Circumpolar deep water 、 Oceanography 、 Geology 、 Mode water 、 Water mass 、 Labrador Sea Water
摘要: We discuss the distributions and transports of main water masses in North Atlantic Subpolar Gyre (NASPG) for mean period 2002–2010 (OVIDE sections every other year), as well inter-annual variability mass structure from 1997 (4x METEOR sections) to 2010. The NASPG, quantitatively assessed by means an Optimum MultiParameter analysis (with 14 masses), was combined with velocity fields resulting previous studies using inverse models obtain volume transports. also evaluate relative contribution Meridional Overturning Circulation (AMOC) characterizing identifying that contribute AMOC variability. reduction magnitude upper limb between 2000s is associated northward transport Central Waters. This flow partially compensated southward lower AMOC, decrease Polar Intermediate Water Mode (SPMW) Irminger Basin. decompose over Reykjanes Ridge East Basin (9.4 ± 4.7 Sv) into contributions Waters (2.1 1.8 Sv), Labrador Sea (LSW, 2.4 2.0 Subarctic (SAIW, 4.0 0.5 Iceland–Scotland Overflow (ISOW, 0.9 Sv). Once LSW ISOW cross Ridge, favoured strong mixing around it, they leave through deep-to-bottom levels. results give insights transformations within such SAIW formation different varieties SPMW due air–sea interaction.