FN Archimer Export Format
PT J
TI Eddy response to Southern Ocean climate modes
BT 
AF MORROW, R.
   WARD, Marshall L.
   HOGG, Andrew McC.
   PASQUET, S.
AS 1:1;2:2;3:2;4:1;
FF 1:;2:;3:;4:;
C1 LEGOS CNRS, F-31401 Toulouse, France.
   Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
C2 LEGOS, FRANCE
   UNIV AUSTRALIAN NATL, AUSTRALIA
IF 3.303
TC 33
UR https://archimer.ifremer.fr/doc/00230/34157/33031.pdf
LA English
DT Article
CR SURVOSTRAL 2000/2001
   SURVOSTRAL 2001/2002
   SURVOSTRAL 2002/2003
   SURVOSTRAL 2003/2004
   SURVOSTRAL 2004/2005
   SURVOSTRAL 2005/2006
   SURVOSTRAL 2006/2007
   SURVOSTRAL 2007/2008
   SURVOSTRAL 2008/2009
   SURVOSTRAL 93
   SURVOSTRAL 94
   SURVOSTRAL 95
   SURVOSTRAL 96
   SURVOSTRAL 97
   SURVOSTRAL 98
   SURVOSTRAL 99
BO L'Astrolabe
AB Interannual variations in Southern Ocean eddy kinetic energy (EKE) are investigated using 16 years of altimetric data. Circumpolar averages show a peak in EKE from 2000 to 2002, 2-3 years after the peak in the Southern Annular Mode (SAM) index. Although the SAM forcing is in phase around the circumpolar band, we find the EKE response varies regionally. The strongest EKE is in the Pacific, with energy peaks occurring progressively later toward the east. We suggest that this is due to the presence of two climate modes: SAM and ENSO. When strong positive SAM events coincide with La Nina periods, as in 1999, anomalous meridional wind forcing is enhanced in the South Pacific Ocean, contributing to the observed increase in EKE 2-3 years later. When positive SAM events coincide with El Nino periods, as in 1993, the climate modes are in opposition in the South Pacific, leading to a weak EKE response during the mid-1990s. Numerical modeling supports these observations. By applying different combinations of SAM and ENSO, we can reproduce both the elevated Pacific EKE response to SAM as well as an additional amplification/suppression of EKE during La Nina/El Nino. In general, we find that the EKE response depends on the interplay between wind forcing, topography, and mean flow and produces a strongly heterogeneous distribution in the Southern Ocean.
PY 2010
PD OCT
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 115
IS C10030
UT 000283091400001
BP 1
EP 12
DI 10.1029/2009JC005894
ID 34157
ER

EF