FN Archimer Export Format
PT J
TI Direct temporal cascade of temperature variance in eddy-permitting simulations of multidecadal variability
BT 
AF HOCHET, Antoine
   HUCK, Thierry
   ARZEL, Olivier
   SEVELLEC, Florian
   COLIN DE VERDIERE, Alain
   MAZLOFF, Matthew
   CORNUELLE, Bruce
AS 1:1;2:3;3:1;4:3;5:1;6:2;7:2;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Brest, CNRS, Ifremer, IRD, Laboratoire d’Oc´eanographie Physique et Spatiale (LOPS, UMR 6523), IUEM, Brest, France
   Scripps institution of Oceanography, La Jolla, California, USA.
   Univ Brest, CNRS, Ifremer, IRD, Laboratoire d’Oc´eanographie Physique et Spatiale (LOPS, UMR 6523), IUEM, Brest, France
C2 UBO, FRANCE
   UNIV CALIF SAN DIEGO, USA
   CNRS, FRANCE
UM LOPS
IN WOS Cotutelle UMR
   copubli-int-hors-europe
IF 5.148
TC 8
UR https://archimer.ifremer.fr/doc/00635/74701/74640.pdf
LA English
DT Article
AB The North Atlantic is characterized by basin-scale multidecadal fluctuations of the sea surface temperature with periods ranging from 20 to 70 years. One candidate for such a variability is a large-scale baroclinic instability of the temperature gradients across the Atlantic associated with the North Atlantic Current. Because of the long time scales involved, most of the studies devoted to this problem are based on low resolution numerical models leaving aside the effect of explicit meso-scale eddies. How high-frequency motions associated with the meso-scale eddy field affect the basin-scale low-frequency variabiliy is the central question of this study. This issue is addressed using an idealized configuration of an Ocean General Circulation Model at eddy-permitting resolution (20 km). A new diagnostic allowing the calculation of nonlinear fluxes of temperature variance in frequency space is presented. Using this diagnostic, we show that the primary effect of meso-scale eddies is to damp low frequency temperature variance and to transfer it to high frequencies. 
PY 2020
PD NOV
SO Journal Of Climate
SN 0894-8755
PU American Meteorological Society
VL 33
IS 21
UT 000589811900020
BP 9409
EP 9425
DI 10.1175/JCLI-D-19-0921.1
ID 74701
ER

EF