FN Archimer Export Format
PT J
TI Processes of interannual mixed layer temperature variability in the thermocline ridge of the Indian Ocean
BT 
AF PRAVEEN KUMAR, B.
   VIALARD, J.
   LENGAIGNE, M.
   MURTY, V. S. N.
   FOLTZ, G. R.
   MCPHADEN, M. J.
   POUS, S.
   DE BOYER MONTEGUT, Clement
AS 1:1;2:2;3:2;4:3;5:4;6:5;7:2,6;8:7;
FF 1:;2:;3:;4:;5:;6:;7:;8:PDG-ODE-LOS;
C1 Govt India, Minist Earth Sci, Indian Natl Ctr Ocean Informat Serv, Hyderabad, Andhra Pradesh, India.
   UPMC, Lab Oceanog Experimentat & Approches Numer, CNRS, IRD,MNHN, Paris, France.
   CSIR Natl Inst Oceanog, Reg Ctr, Vishakhapatnam, India.
   NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA.
   NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA.
   Univ Cape Town, Dept Oceanog, IRD, LMI ICEMASA, ZA-7925 Cape Town, South Africa.
   IFREMER, Ctr Brest, Lab Oceanog Spatiale, F-29280 Plouzane, France.
C2 GOVT INDIA, INDIA
   UNIV PARIS 06, FRANCE
   CSIR (INDIA), INDIA
   NOAA, USA
   NOAA, USA
   UNIV CAPE TOWN, SOUTH AFRICA
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 4.673
TC 12
UR https://archimer.ifremer.fr/doc/00185/29642/28051.pdf
LA English
DT Article
CR CIRENE 2007
BO Le Suroît
DE ;Thermocline ridge of the Indian Ocean;Surface temperature interannual variability;ENSO;IOD
AB Sea-surface temperature interannual anomalies (SSTAs) in the thermocline ridge of the southwestern tropical Indian Ocean (TRIO) have several well-documented climate impacts. In this paper, we explore the physical processes responsible for SSTA evolution in the TRIO region using a combination of observational estimates and model-derived surface layer heat budget analyses. Vertical oceanic processes contribute most to SSTA variance from December to June, while lateral advection dominates from July to November. Atmospheric fluxes generally damp SSTA generation in the TRIO region. As a result of the phase opposition between the seasonal cycle of vertical processes and lateral advection, there is no obvious peak in SSTA amplitude in boreal winter, as previously noted for heat content anomalies. Positive Indian Ocean Dipole (IOD) events and the remote influence of El Niño induce comparable warming over the TRIO region, though IOD signals peak earlier (November–December) than those associated with El Niño (around March–May). Mechanisms controlling the SSTA growth in the TRIO region induced by these two climate modes differ strongly. While SSTA growth for the IOD mostly results from southward advection of warmer water, increased surface shortwave flux dominates the El Niño SSTA growth. In both cases, vertical oceanic processes do not contribute strongly to the initial SSTA growth, but rather maintain the SSTA by opposing the effect of atmospheric negative feedbacks during the decaying phase.
PY 2014
PD NOV
SO Climate Dynamics
SN 0930-7575
PU Springer
VL 43
IS 9-10
UT 000344480100004
BP 2377
EP 2397
DI 10.1007/s00382-014-2059-y
ID 29642
ER

EF