FN Archimer Export Format
PT J
TI Mesoscale dynamics in the Arabian Sea and a focus on the Great Whirl life cycle: A numerical investigation using ROMS
BT 
AF VIC, Clement
   ROULLET, Guillaume
   CARTON, Xavier
   CAPET, X.
AS 1:1;2:1;3:1;4:2;
FF 1:;2:;3:;4:;
C1 CNRS Ifremer IRD UBO, UMR 6523, Lab Phys Oceans, Brest, France.
   CNRS UPMC IRD MNHN, UMR 7159, IPSL LOCEAN, Paris, France.
C2 UBO, FRANCE
   IPSL, FRANCE
TC 41
UR https://archimer.ifremer.fr/doc/00211/32197/30631.pdf
LA English
DT Article
DE ;Arabian Sea;Indian Ocean;Great Whirl;mesoscale dynamics;ROMS;Rossby waves
AB The Great Whirl (GW) is a persistent anticyclonic mesoscale eddy that is observed seasonally in the Arabian Sea during a period embedding the 3 months of the southwest monsoon (June–July–August) at a quasi-steady location. Its dynamics remain unclear despite it being one of the largest coherent vortices in the world ocean. Realistic regional numerical experiments using ROMS are performed to investigate the life cycle of the GW, which is not well resolved by sparse available in situ measurements in the region. Using a set of sensitivity experiments and an accurate temporal characterization of the eddy properties (including position, radius, depth, and vorticity) we (i) confirm the role of basin-scale downwelling Rossby waves in the GW generation, (ii) clarify the role of the monsoonal strong anticyclonic wind in its maintenance and barotropization, and (iii) suggest a connection between basin-scale Rossby wave dynamics and GW collapse.
PY 2014
PD SEP
SO Journal Of Geophysical Research-oceans
SN 0148-0027
PU Amer Geophysical Union
VL 119
IS 9
UT 000343879200047
BP 6422
EP 6443
DI 10.1002/2014JC009857
ID 32197
ER

EF