FN Archimer Export Format
PT J
TI Buoyancy forcing and the subpolar Atlantic meridional overturning circulation
BT 
AF Buckley, Martha W.
   Lozier, M. Susan
   Desbruyères, Damien
   Evans, Dafydd Gwyn
AS 1:1;2:2;3:3;4:4;
FF 1:;2:;3:PDG-ODE-LOPS-OH;4:;
C1 Department of Atmospheric, Oceanic and Earth Sciences,George Mason University, Fairfax, VA 22030, USA
   School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30318, USA
   Laboratoire d’Océanographie Physique et Spatiale (LOPS),Univ Brest, CNRS, Ifremer, IRD, IUEM, F29280 Plouzané, France
   National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK
C2 UNIV GEORGE MASON, USA
   INST TECH GEORGIA, USA
   IFREMER, FRANCE
   NOC, UK
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   copubli-europe
   copubli-int-hors-europe
IF 5
TC 2
UR https://archimer.ifremer.fr/doc/00858/96985/105673.pdf
   https://archimer.ifremer.fr/doc/00858/96985/105674.pdf
LA English
DT Article
DE ;Atlantic meridional overturning circulation;buoyancy forcing;water mass transformation
AB The North Atlantic meridional overturning circulation and its variability are examined in terms of the overturning in density space and diapycnal water mass transformation. The magnitude of the mean overturning is similar to the surface water mass transformation, but the density and properties of these waters are modified by diapycnal mixing. Surface waters are progressively densified while circulating cyclonically around the subpolar gyre, with the densest waters and deepest convection occurring in the Labrador Sea and Nordic Seas. The eddy-driven interaction between the convective interior and boundary currents is a key to the export of dense waters from marginal seas. Due to the multitude of pathways of dense waters within the subpolar gyre, as well as mixing with older waters, waters exiting the subpolar gyre have a wide range of ages, with a mean age on the order of a decade. As a result, interannual changes in water mass transformation are mostly balanced locally and do not result in changes in export to the subtropics. Only persistent changes in water mass transformation result in changes in export to the subtropics. The dilution of signals from upstream water mass transformation suggests that variability in export of dense waters to the subtropics may be controlled by other processes, including interaction of dense waters with the energetic upper ocean. This article is part of a discussion meeting issue ‘Atlantic overturning: new observations and challenges’. 
PY 2023
PD DEC
SO Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences
SN 1364-503X
PU The Royal Society
VL 381
IS 2262
UT 001100640400011
DI 10.1098/rsta.2022.0181
ID 96985
ER

EF