FN Archimer Export Format
PT J
TI A four-dimensional analysis of the thermal structure in the Gulf of Lion
BT 
AF GAILLARD, Fabienne
   DESAUBIES, Yves
   SEND, Uwe
   SCHOTT, Fritz
AS 1:1;2:1;3:2;4:2;
FF 1:;2:;3:;4:;
C1 IFREMER, LAB PHYS OCEANS, BP 70, F-29280 PLOUZANE, FRANCE.
   INST MEERESKUNDE, D-24105 KIEL, GERMANY.
C2 IFREMER, FRANCE
   UNIV KIEL, GERMANY
IN WOS Ifremer jusqu'en 2018
IF 2.68
TC 14
UR https://archimer.ifremer.fr/doc/00336/44704/44916.pdf
LA English
DT Article
CR EXPERIENCE THETIS 1-TOMOGRAPHIE
   MEDOC 1969
   MEDOC 1969
   MEDOC 1970
   MEDOC 1972
   MEDOC 72-JC
   MEDOC 73
   MEDOC 74
   MEDOC 75
   MEDOC 75 BORHA II
BO Unknown
   Borha
   Jean Charcot
   Le Noroit
   Borha II
AB The Theoretical and Experimental Tomography in the Sea Experiment (THETIS 1) took place in the Gulf of Lion to observe the evolution of the temperature field and the process of deep convection during the 1991-1992 winter. The temperature measurements consist, of moored sensors, conductivity-temperature-depth and expendable bathythermograph surveys, ana acoustic tomography. Because of this diverse data set and since the field evolves rather fast, the analysis uses a unified framework, based on estimation theory and implementing a Kalman filter. The resolution and the errors associated with the model are systematically estimated. Temperature is a good tracer of water masses. The time-evolving three-dimensional view of the field resulting from the analysis shows the details of the three classical convection phases: preconditioning, vigourous convection, and relaxation. In all phases, there is strong spatial nonuniformity, with mesoscale activity, short timescales, and sporadic evidence of advective events (surface capping, intrusions of Levantine Intermediate Water (LIW)). Deep convection, reaching 1500 m, was observed in late February; by late April the field had not yet returned to its initial conditions (strong deficit of LIW). Comparison with available atmospheric flux data shows that advection acts to delay the occurence of convection and confirms the essential role of buoyancy fluxes. For this winter, the deep. mixing results in an injection of anomalously warm water (Delta T similar or equal to 0.03 degrees) to a depth of 1500 m, compatible with the deep warming previously reported.
PY 1997
PD JUL
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 102
IS C6
UT A1997XF42200012
BP 12515
EP 12537
DI 10.1029/96JC03821
ID 44704
ER

EF