FN Archimer Export Format
PT J
TI Variability of the Heat and Salt Budget in the Subtropical Southeastern Pacific Mixed Layer between 2004 and 2010: Spice Injection Mechanism
BT 
AF KOLODZIEJCZYK, Nicolas
   GAILLARD, Fabienne
AS 1:1;2:1;
FF 1:PDG-ODE-LPO;2:PDG-ODE-LPO;
C1 CNRS Ifremer IRD UBO, IFREMER, Lab Phys Oceans, UMR 6523, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
SI BREST
SE PDG-ODE-LPO
IN WOS Ifremer jusqu'en 2018
IF 2.871
TC 28
UR https://archimer.ifremer.fr/doc/00155/26587/24722.pdf
LA English
DT Article
DE ;Mixed layer;Heat budgets;fluxes;Salinity;In situ oceanic observations;Interannual variability;Seasonal cycle
AB The mixed layer heat and salt budget in the southeastern subtropical Pacific are estimated using 7 years (2004-10) of Argo-profiling float data, surface fluxes, precipitation, surface velocity data, and wind observations and reanalysis. In this region, the mixed layer heat budget is characterized by a strong annual cycle mainly modulated by the shortwave radiation annual cycle. During the austral fall and winter, the shortwave radiation input minimum is overwhelmed by the heat loss mainly because of the latent heat flux. The mixed layer salt budget also presents a strong annual cycle with a minimum of salt content during the late austral winter. In contrast with the heat budget, the salt budget is mainly driven by the unresolved terms computed as the residual of the budget. Among these missing terms, the most likely candidate is the vertical turbulent mixing as a result of convection caused by the heat surface buoyancy loss and the destabilizing vertical gradient of salinity at the base of the mixed layer. This downward flux of salt at the base of the mixed layer could explain the annual spiciness injection and interannual spiciness variability in the permanent thermocline in the southeastern Pacific.
PY 2013
PD SEP
SO Journal Of Physical Oceanography
SN 0022-3670
PU Amer Meteorological Soc
VL 43
IS 9
UT 000323891800003
BP 1880
EP 1898
DI 10.1175/JPO-D-13-04.1
ID 26587
ER

EF