FN Archimer Export Format
PT J
TI Simulated seasonal and interannual variability of the mixed layer heat budget in the northern Indian Ocean
BT 
AF DE BOYER MONTEGUT, Clement
   VIALARD, Jerome
   SHENOI, S. S. C.
   SHANKAR, D.
   DURAND, Fabien
   ETHE, Christian
   MADEC, Gurvan
AS 1:1;2:1;3:2;4:2;5:3;6:1;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Inst Pierre Simon Laplace, Lab Oceanog & Climat Experimentat & Approches Num, Paris, France.
   Natl Inst Oceanog, Phys Oceanog Div, Panaji, Goa, India.
   Inst Rech Dev, Lab Etud Geophys & Oceanog Spatiales, Toulouse, France.
C2 IPSL, FRANCE
   NATL INST OCEANOG GOA, INDIA
   IRD, FRANCE
IF 3.55
TC 77
UR https://archimer.ifremer.fr/doc/00185/29639/27985.pdf
LA English
DT Article
CR CIRENE 2007
   VT 102 / CIRENE
   VT 75 / CIRENE
BO Le Suroît
   Marion Dufresne
DE ;sea surface temperature;general circulation model;southeastern arabian sea;thermal structure;summer monsoon;solar radiation;pacific ocean;barrier layer;bengal;bay
AB A global ocean general circulation model (OGCM) is used to investigate the mixed layer heat budget of the northern Indian Ocean (NIO). The model is validated against observations and shows fairly good agreement with mixed layer depth data in the NIO. The NIO has been separated into three subbasins: the western Arabian Sea (AS), the eastern AS, and the Bay of Bengal (BoB). This study reveals strong differences between the western and eastern AS heat budget, while the latter basin has similarities with the BoB. Interesting new results on seasonal time scales are shown. The penetration of solar heat flux needs to be taken into account for two reasons. First, an average of 28 W m(-2) is lost beneath the mixed layer over the year. Second, the penetration of solar heat flux tends to reduce the effect of solar heat flux on the SST seasonal cycle in the AS because the seasons of strongest flux are also seasons with a thin mixed layer. This enhances the control of SST seasonal variability by latent heat flux. The impact of salinity on SST variability is demonstrated. Salinity stratification plays a clear role in maintaining a high winter SST in the BoB and eastern AS while not in the western AS. The presence of freshwater near the surface allows heat storage below the surface layer that can later be recovered by entrainment warming during winter cooling (with a winter contribution of + 2.1 degrees C over left right C in the BoB). On an interannual time scale, the eastern AS and BoB are strongly controlled by the winds through the latent heat flux anomalies. In the western AS, vertical processes, as well as horizontal advection, contribute significantly to SST interannual variability, and the wind is not the only factor controlling the heat flux forcing.
PY 2007
PD JUN
SO Journal Of Climate
SN 0894-8755
PU Amer Meteorological Soc
VL 20
IS 13
UT 000247648900021
BP 3249
EP 3268
DI 10.1175/JCLI4148.1
ID 29639
ER

EF