FN Archimer Export Format
PT J
TI Tropical Atlantic Mixed Layer Buoyancy Seasonality: Atmospheric and Oceanic Physical Processes Contributions
BT 
AF Camara, Ibrahima
   Mignot, Juliette
   Kolodziejczyk, Nicolas
   Losada, Teresa
   Lazar, Alban
AS 1:1;2:2;3:3;4:4;5:2;
FF 1:;2:;3:;4:;5:;
C1 Laboratoire de Physique de l’Atmosphère et de l’Océan (LPAO), ESP/UCAD/, Dakar 5085, Senegal
   LOCEAN Laboratory, Sorbonne Universités (CNRS/IRD/MNHN), 75005 Paris, France
   UBO, CNRS, IRD, Ifremer, Laboratoire d’Océanographie Physique et Spatiale, 29280 Plouzané, France
   Departamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28012 Madrid, Spain
C2 ECOLE SUP POLYTECH, SENEGAL
   UNIV SORBONNE, FRANCE
   UBO, FRANCE
   UNIV COMPLUTENSE MADRID, SPAIN
UM LOPS
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 1.048
TC 0
UR https://archimer.ifremer.fr/doc/00634/74636/74530.pdf
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   IMAGES V LEG 5
BO Marion Dufresne
DE ;physical processes;salt and heat budget;density;compensation
AB This study investigates the physical processes controlling the mixed layer buoyancy using a regional configuration of an ocean general circulation model. Processes are quantified by using a linearized equation of state, a mixed-layer heat, and a salt budget. Model results correctly reproduce the observed seasonal near-surface density tendencies. The results indicate that the heat flux is located poleward of 10° of latitude, which is at least three times greater than the freshwater flux that mainly controls mixed layer buoyancy. During boreal spring-summer of each hemisphere, the freshwater flux partly compensates the heat flux in terms of buoyancy loss while, during the fall-winter, they act together. Under the seasonal march of the Inter-tropical Convergence Zone and in coastal areas affected by the river, the contribution of ocean processes on the upper density becomes important. Along the north Brazilian coast and the Gulf of Guinea, horizontal and vertical processes involving salinity are the main contributors to an upper water change with a contribution of at least twice as much the temperature. At the equator and along the Senegal-Mauritanian coast, vertical processes are the major oceanic contributors. This is mainly due to the vertical gradient of temperature at the mixed layer base in the equator while the salinity one dominates along the Senegal-Mauritania coast 
PY 2020
PD JUL
SO Atmosphere
SN 2073-4433
PU MDPI AG
VL 11
IS 6
UT 000551129000001
DI 10.3390/atmos11060649
ID 74636
ER

EF