FN Archimer Export Format
PT J
TI The influence of merger and convection on an anticyclonic eddy trapped in a bowl
BT 
AF DE MAREZ, Charly
   LE CORRE, Mathieu
   GULA, Jonathan
AS 1:1;2:1,3;3:1,2;
FF 1:;2:;3:;
C1 Univ Brest, IUEM, Lab Oceanog Phys & Spatiale LOPS, Rue Dumont Urville, F-29280 Plouzane, France.
   Inst Univ France IUF, Paris, France.
   Univ Toulouse, UPS, CNES, CNRS,IRD,LEGOS, Toulouse, France.
C2 UBO, FRANCE
   INST UNIV FRANCE, FRANCE
   UNIV TOULOUSE, FRANCE
UM LOPS
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 3.293
TC 6
UR https://archimer.ifremer.fr/doc/00729/84080/91042.pdf
LA English
DT Article
DE ;Mesoscale;Vortex;Merger;Convection
AB We investigate the impact of several parameters on the lifecycle of an anticyclonic eddy lying in a topographic depression (a bowl), similar to the Lofoten Vortex and the Rockall Trough eddy cases. We observe that the vortex merger with submesoscale coherent vortices generated at depth allows the eddy to grow in size, and intensify at depth. Wintertime convection is also shown to directly intensify the eddy by deepening isopycnals. Also, convection indirectly affects the shape of the eddy. It enhances the number of merger (1) at the surface, with small vortices generated in the convectively-deepened surface mixed-layer, and (2) at depth, because the vertical distance between the main eddy's core and small companion vortices is reduced, thus increasing the merging efficiency. These processes altogether contribute to the maintaining of the eddy. On the other hand, the bottom drag is the main process contributing to the decay of the eddy. Our study thus shows that the sustaining for several years of such eddies trapped in a bowl is mainly due to the balance between merger and bottom drag. 
PY 2021
PD NOV
SO Ocean Modelling
SN 1463-5003
PU Elsevier Sci Ltd
VL 167
UT 000700214100005
DI 10.1016/j.ocemod.2021.101874
ID 84080
ER

EF