FN Archimer Export Format
PT J
TI Interannual Variability of the Mixed Layer Winter Convection and Spice Injection in the Eastern Subtropical North Atlantic
BT 
AF KOLODZIEJCZYK, Nicolas
   REVERDIN, Gilles
   LAZAR, Alban
AS 1:1;2:1;3:1;
FF 1:;2:;3:;
C1 Univ Paris 06, Sorbonne Univ, LOCEAN Lab, CNRS,IRD,MNHN, F-75005 Paris, France.
C2 UNIV PARIS 06, FRANCE
IF 3.026
TC 18
UR https://archimer.ifremer.fr/doc/00624/73566/73010.pdf
LA English
DT Article
CR PIRATA
   STRASSE
BO Thalassa
AB The Argo dataset is used to study the winter upper-ocean conditions in the northeastern subtropical (NEA) Atlantic during 2006-12. During late winter 2010, the mixed layer depth is abnormally shallow and a negative anomaly of density-compensated salinity, the so-called spiciness, is generated in the permanent pycnocline. This is primarily explained by unusual weak air-sea buoyancy flux during the late winter 2010, in contrast with the five other studied winters. Particularly deep mixed layers and strong spiciness anomalies are observed during late winter 2012. The 2010 winter conditions appear to be related to historically low North Atlantic Oscillation (NAO) and high tropical North Atlantic index (TNA). Interannual variability of the eastern subtropical mixed layer is further investigated using a simple 1D bulk model of mean temperature and salinity linear profiles, based on turbulent kinetic energy conservation in the upper-ocean layer, and forced only with seasonal air-sea buoyancy forcing corresponding to fall-winter 2006-12. It suggests that year-to-year variability of the winter convective mixing driven by atmospheric buoyancy flux is able to generate interannual variability of both late winter mixed layer depth and spiciness in a strongly compensated layer at the base of the mixed layer and in the permanent pycnocline. 
PY 2015
PD FEB
SO Journal Of Physical Oceanography
SN 0022-3670
PU Amer Meteorological Soc
VL 45
IS 2
UT 000349546200012
BP 504
EP 525
DI 10.1175/JPO-D-14-0042.1
ID 73566
ER

EF