FN Archimer Export Format
PT J
TI On the dynamics of an idealised bottom density current overflowing in a semi-enclosed basin: mesoscale and submesoscale eddies generation
BT 
AF MORVAN, Mathieu
   Carton, Xavier
   L'Hégaret, Pierre
   de Marez, Charly
   Corréard, Stéphanie
   Louazel, Stephanie
AS 1:1;2:1;3:1;4:1;5:2;6:3;
FF 1:;2:;3:;4:;5:;6:;
C1 LOPS, Univ. Brest-CNRS-IFREMER-IRD, IUEM, Plouzané, France
   SHOM/DOPS/STM/DTO, Toulouse Cedex 5, France
   SHOM/DOPS/STM/DTO, Brest Cedex 2, France
C2 UBO, FRANCE
   SHOM, FRANCE
   SHOM, FRANCE
UM LOPS
IN WOS Cotutelle UMR
   copubli-france
IF 1.451
TC 6
UR https://archimer.ifremer.fr/doc/00627/73918/93515.pdf
LA English
DT Article
DE ;Bottom density current;Red Sea outflow;submesoscale eddies;current instability;mesoscale eddies
AB The Red Sea Water enters the Gulf of Aden through the Strait of Bab El Mandeb as a density current. The Red Sea Water subsequently spreads into the Gulf of Aden under the influence of surface mesoscale eddies, which dominate the surface flow, of topographic features such as rift and capes, and of the monsoon regimes. The dynamics of a bottom density current overflowing in a semi-enclosed basin, as the Red Sea Water outflows in the Gulf of Aden, is investigated by performing idealised numerical simulations, at submesoscale resolution, in which we progressively add topographic and dynamical elements. The rift and cape play an important role, respectively, on the vertical and the horizontal mixing as well as baroclinic and barotropic instabilities undergone by the bottom density current. Mesoscale and submesoscale eddies are generated depending on the model configuration. In the presence of surface mesoscale eddies, the bottom density current water is mainly advected at their periphery. In winter, both mesoscale and submesoscale eddies are generated, while in summer only submesoscale eddies are present. Finally, to put our results based on idealised numerical simulations and Lagrangian experiments in perspective, we analyse the trajectories of three Argo floats, deployed in the Rift of Tadjurah. Clues of submesoscale eddies generation at capes are observed which is in agreement with our idealised numerical simulations. 
PY 2020
PD SEP
SO Geophysical And Astrophysical Fluid Dynamics
SN 0309-1929
PU Informa UK Limited
VL 114
IS 4-5
UT 000558381300001
BP 607
EP 630
DI 10.1080/03091929.2020.1747058
ID 73918
ER

EF