FN Archimer Export Format
PT J
TI Strong Indian Ocean sea surface temperature signals associated with the Madden-Julian Oscillation in late 2007 and early 2008
BT 
AF VIALARD, Jerome
   FOLTZ, G. R.
   MCPHADEN, M. J.
   DUVEL, J. P.
   DE BOYER MONTEGUT, Clement
AS 1:1;2:2;3:3;4:4;5:5;
FF 1:;2:;3:;4:;5:;
C1 Univ Paris 06, LOCEAN, IRD, F-75232 Paris 05, France.
   Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98115 USA.
   NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA.
   CNRS, Meteorol Dynam Lab, F-75231 Paris 05, France.
   JAMSTEC, Frontier Res Ctr Global Change, Yokohama, Kanagawa, Japan.
C2 IRD, FRANCE
   UNIV WASHINGTON, USA
   NOAA, USA
   CNRS, FRANCE
   JAMSTEC, JAPAN
IF 2.959
TC 75
TU Centre national de la recherche scientifique
   Institut de recherche pour le développement
   Muséum national d'histoire naturelle
   Université Pierre et Marie Curie
UR https://archimer.ifremer.fr/doc/00185/29636/27988.pdf
LA English
DT Article
CR CIRENE 2007
   VT 75 / CIRENE
BO Le Suroît
   Marion Dufresne
DE ;layer heat balance;paific;perturbations;prediction;fluxes
AB A moored buoy was recently deployed at 8 degrees S, 67 degrees E in the shallow thermocline region of the Indian Ocean known as "Seychelles-Chagos Thermocline Ridge'' (SCTR), where the Madden Julian Oscillation (MJO) is associated with strong sea surface temperature (SST) variability. We use observations from this mooring to describe the oceanic signature of two MJOs between November 2007 and February 2008. The four-month average upper ocean heat balance was largely between heating by atmospheric forcing (2.0 +/- 0.3 degrees C/month) and a significant cooling by subsurface processes (-2.2 +/- 0.8 degrees C/month), consistent with climatological Ekman pumping in the region. The two MJO events resulted in strong intraseasonal SST variations (1.5 to 2 degrees C in similar to 20 days) in the SCTR. At the mooring site, atmospheric fluxes dominated the upper ocean heat balance at the MJO timescale, with the net surface heat flux into the ocean decreasing from an average 105 W m(-2) during suppressed phases to 15 W m(-2) during active phases of the MJO. It is difficult to establish if MJO-induced variations of subsurface processes also contributed to the cooling because of large uncertainty in this term. Lateral advection had no systematic fluctuations on MJO timescales, but cannot be neglected at the mooring site.
PY 2008
PD OCT
SO Geophysical Research Letters
SN 0094-8276
PU Amer Geophysical Union
VL 35
IS LI19608
UT 000260177000005
BP 1
EP 5
DI 10.1029/2008GL035238
ID 29636
ER

EF