FN Archimer Export Format
PT J
TI Pending recovery in the strength of the meridional overturning circulation at 26° N
BT 
AF Moat, Ben I.
   Smeed, David A.
   Frajka-Williams, Eleanor
   Desbruyères, Damien
   Beaulieu, Claudie
   Johns, William E.
   Rayner, Darren
   Sanchez-Franks, Alejandra
   Baringer, Molly O.
   Volkov, Denis
   Jackson, Laura C.
   Bryden, Harry L.
AS 1:1;2:1;3:1;4:2;5:3;6:4;7:1;8:1;9:5;10:5,6;11:7;12:8;
FF 1:;2:;3:;4:PDG-ODE-LOPS-OH;5:;6:;7:;8:;9:;10:;11:;12:;
C1 National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton, SO14 3ZH, UK
   Ifremer, University of Brest, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, IUEM, Ifremer centre de Bretagne, 29280 Plouzané, France
   Ocean Sciences Department, University of California Santa Cruz, Santa Cruz, CA, USA
   Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, USA
   Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, USA
   Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, USA
   Met Office, Exeter, UK
   School of Ocean and Earth Science, University of Southampton Waterfront Campus, European Way, Southampton, SO14 3ZH, UK
C2 NOC, UK
   IFREMER, FRANCE
   UNIV CALIF SANTA CRUZ, USA
   UNIV MIAMI, USA
   NOAA, USA
   UNIV MIAMI, USA
   MET OFFICE, UK
   UNIV SOUTHAMPTON, UK
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   DOAJ
   copubli-europe
   copubli-int-hors-europe
IF 3.416
TC 58
UR https://archimer.ifremer.fr/doc/00643/75537/76443.pdf
   https://archimer.ifremer.fr/doc/00643/75537/76444.pdf
LA English
DT Article
AB The strength of the Atlantic meridional overturning circulation (AMOC) at 26∘ N has now been continuously measured by the RAPID array over the period April 2004–September 2018. This record provides unique insight into the variability of the large-scale ocean circulation, previously only measured by sporadic snapshots of basin-wide transport from hydrographic sections. The continuous measurements have unveiled striking variability on timescales of days to a decade, driven largely by wind forcing, contrasting with previous expectations about a slowly varying buoyancy-forced large-scale ocean circulation. However, these measurements were primarily observed during a warm state of the Atlantic multidecadal variability (AMV) which has been steadily declining since a peak in 2008–2010. In 2013–2015, a period of strong buoyancy forcing by the atmosphere drove intense water-mass transformation in the subpolar North Atlantic and provides a unique opportunity to investigate the response of the large-scale ocean circulation to buoyancy forcing. Modelling studies suggest that the AMOC in the subtropics responds to such events with an increase in overturning transport, after a lag of 3–9 years. At 45∘ N, observations suggest that the AMOC may already be increasing. Examining 26∘ N, we find that the AMOC is no longer weakening, though the recent transport is not above the long-term mean. Extending the record backwards in time at 26∘ N with ocean reanalysis from GloSea5, the transport fluctuations at 26∘ N are consistent with a 0- to 2-year lag from those at 45∘ N, albeit with lower magnitude. Given the short span of time and anticipated delays in the signal from the subpolar to subtropical gyres, it is not yet possible to determine whether the subtropical AMOC strength is recovering nor how the AMOC at 26∘ N responds to intense buoyancy forcing. 
PY 2020
PD JUN
SO Ocean Science
SN 1812-0784
PU Copernicus GmbH
VL 16
IS 4
UT 000555403000001
BP 863
EP 874
DI 10.5194/os-16-863-2020
ID 75537
ER

EF