FN Archimer Export Format
PT J
TI Intraseasonal variability of mixed layer depth in the tropical Indian Ocean
BT 
AF KEERTHI, M. G.
   LENGAIGNE, M.
   DRUSHKA, K.
   VIALARD, J.
   DE BOYER MONTEGUT, Clement
   POUS, Stephane
   LEVY, M.
   MURALEEDHARAN, P. M.
AS 1:1;2:2,3;3:4;4:2;5:5;6:2,6;7:2;8:1;
FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-SIAM;6:;7:;8:;
C1 CSIR, Natl Inst Oceanog, Panaji 403004, Goa, India.
   Univ Paris 06, Univ Paris 04, LOCEAN, CNRS IRD MNHN,IPSL, Paris, France.
   NIO, Joint Int Lab, Indofrench Cell Water Sci, IISc NIO IITM IRD, Panaji, Goa, India.
   Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA.
   IFREMER, Lab Oceanog Spatiale, Brest, France.
   Univ Cape Town, Dept Oceanog, Cape Town, South Africa.
C2 CSIR, INDIA
   UNIV PARIS 06, FRANCE
   NIO, INDIA
   UNIV WASHINGTON, USA
   IFREMER, FRANCE
   UNIV CAPE TOWN, SOUTH AFRICA
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 4.146
TC 39
UR https://archimer.ifremer.fr/doc/00332/44335/45788.pdf
LA English
DT Article
AB In this paper, we use an observational dataset built from Argo in situ profiles to describe the main large-scale patterns of intraseasonal mixed layer depth (MLD) variations in the Indian Ocean. An eddy permitting (0.25A degrees) regional ocean model that generally agrees well with those observed estimates is then used to investigate the mechanisms that drive MLD intraseasonal variations and to assess their potential impact on the related SST response. During summer, intraseasonal MLD variations in the Bay of Bengal and eastern equatorial Indian Ocean primarily respond to active/break convective phases of the summer monsoon. In the southern Arabian Sea, summer MLD variations are largely driven by seemingly-independent intraseasonal fluctuations of the Findlater jet intensity. During winter, the Madden-Julian Oscillation drives most of the intraseasonal MLD variability in the eastern equatorial Indian Ocean. Large winter MLD signals in northern Arabian Sea can, on the other hand, be related to advection of continental temperature anomalies from the northern end of the basin. In all the aforementioned regions, peak-to-peak MLD variations usually reach 10 m, but can exceed 20 m for the largest events. Buoyancy flux and wind stirring contribute to intraseasonal MLD fluctuations in roughly equal proportions, except for the Northern Arabian Sea in winter, where buoyancy fluxes dominate. A simple slab ocean analysis finally suggests that the impact of these MLD fluctuations on intraseasonal sea surface temperature variability is probably rather weak, because of the compensating effects of thermal capacity and sunlight penetration: a thin mixed-layer is more efficiently warmed at the surface by heat fluxes but loses more solar flux through its lower base.
PY 2016
PD APR
SO Climate Dynamics
SN 0930-7575
PU Springer
VL 46
IS 7-8
UT 000373442900035
BP 2633
EP 2655
DI 10.1007/s00382-015-2721-z
ID 44335
ER

EF