FN Archimer Export Format
PT J
TI Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model
BT 
AF Moat, B. I.
   Sinha, B.
   Josey, S. A.
   Robson, J.
   Ortega, P.
   Sévellec, Florian
   Holliday, N. P.
   McCarthy, G. D.
   New, A. L.
   Hirschi, J. J.-M.
AS 1:1;2:1;3:1;4:2;5:3;6:4;7:1;8:5;9:1;10:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton, UK.
   NCAS-Climate, University of Reading, Reading, UK.
   Barcelona Supercomputing Center, Barcelona, Spain.
   Laboratoire d’Océanographie Physique et Spatiale, UMR 6523 CNRS IFREMER. IRD UBO, Plouzané, France.
   Maynooth University, Ireland.
C2 NOC, UK
   UNIV READING, UK
   BCS CNS, SPAIN
   CNRS, FRANCE
   UNIV MAYNOOTH, IRELAND
UM LOPS
IN WOS Cotutelle UMR
   copubli-europe
IF 5.707
TC 15
UR https://archimer.ifremer.fr/doc/00502/61395/65060.pdf
LA English
DT Article
DE ;Atmosphere-ocean interaction;Climate variability;Energy budget;balance;Fluxes;Heat budgets;fluxes;Surface temperature
AB An ocean mixed layer heat budget methodology is used to investigate the physical processes determining subpolar North Atlantic (SPNA) sea surface temperature (SST) and ocean heat content (OHC) variability on decadal-multidecadal timescales using the state-of-the-art climate model HadGEM3-GC2. New elements include development of an equation for evolution of anomalous SST for interannual and longer timescales in a form analogous to that for OHC, parameterization of the diffusive heat flux at the base of the mixed layer and analysis of a composite AMOC event. Contributions to OHC and SST variability from two sources are evaluated i) net ocean-atmosphere heat flux and ii) all other processes, including advection, diffusion and entrainment for SST. Anomalies in OHC tendency propagate anticlockwise around the SPNA on multidecadal timescales with a clear relationship to the phase of the Atlantic meridional overturning circulation (AMOC). AMOC anomalies lead SST tendencies which in turn lead OHC tendencies in both the eastern and western SPNA. OHC and SST variations in the SPNA on decadal timescales are dominated by AMOC variability because it controls variability of advection which is shown to be the dominant term in the OHC budget. Lags between OHC and SST is traced to differences between the advection term for OHC and the advection-entrainment term for SST. The new results have implications for interpretation of variations in Atlantic heat uptake in the CMIP6 climate model assessment. 
PY 2019
PD SEP
SO Journal Of Climate
SN 0894-8755
PU American Meteorological Society
VL 32
IS 18
UT 000482205200002
BP 6137
EP 6161
DI 10.1175/JCLI-D-18-0709.1
ID 61395
ER

EF