FN Archimer Export Format
PT J
TI SIDDIES Corridor: A Major East-West Pathway of Long-Lived Surface and Subsurface Eddies Crossing the Subtropical South Indian Ocean
BT 
AF DILMAHAMOD, Ahmad Fehmi
   AGUIAR-GONZALEZ, B.
   PENVEN, P.
   REASON, C. J. C.
   DE RUIJTER, W. P. M.
   MALAN, N.
   HERMES, J. C.
AS 1:1,2,3;2:4,5;3:2;4:1;5:6;6:1,3;7:1,3;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Cape Town, Dept Oceanog, Cape Town, South Africa.
   Univ Brest, LOPS, IUEM, CNRS,IRD,Ifremer, Brest, France.
   South African Environm Observat Network, Cape Town, South Africa.
   Univ Utrecht, NIOZ Royal Netherlands Inst Sea Res, Dept Ocean Syst Sci, Den Burg, Texel, Netherlands.
   Univ Delaware, Coll Earth Ocean & Environm, Sch Marine Sci & Policy, Newark, DE USA.
   Univ Utrecht, Inst Marine & Atmospher Res, Utrecht, Netherlands.
C2 UNIV CAPE TOWN, SOUTH AFRICA
   UBO, FRANCE
   SAEON, SOUTH AFRICA
   INST SEA RESEARCH (NIOZ), NETHERLANDS
   UNIV DELAWARE, USA
   UNIV UTRECHT, NETHERLANDS
UM LOPS
IF 3.235
TC 33
UR https://archimer.ifremer.fr/doc/00440/55194/56670.pdf
LA English
DT Article
DE ;South Indian Ocean;eddy corridor;surface and subsurface eddies;long-lived eddies;eddy demography;heat;freshwater fluxes
AB South Indian Ocean eddies (SIDDIES), originating from a high evaporation region in the eastern Indian Ocean, are investigated by tracking individual eddies from satellite data and co‐located Argo floats. A subsurface‐eddy identification method, based on its steric dynamic height anomaly, is devised to assign Argo profiles to surface eddies (surfSIDDIES) or subsurface eddies (subSIDDIES). These westward‐propagating, long‐lived features (>3 months) prevail over a preferential latitudinal band, forming a permanent structure linking the eastern to the western Indian Ocean, that we call the 'SIDDIES Corridor'. Key features have been revealed in the mean thermohaline vertical structure of these eddies. Anticyclonic SIDDIES are characterized by positive subsurface salinity anomalies, with subSIDDIES not exhibiting negative surface anomalies, as opposed to surfSIDDIES. Cyclonic subSIDDIES also occur, but their related salinity anomalies are weaker. SubSIDDIES exhibit two cores of different temperature polarities in their surface and subsurface levels. Cyclonic subSIDDIES have their cores at around 150‐200 m depth along the 25.4‐25.8 kg m− 3 potential density layer with anticyclonic subSIDDIES having their cores at 250‐300 m along the 26‐26.4 kg m− 3 density layer. The SIDDIES corridor acts as a zonal pathway for both eddy‐types to advect water masses and biogeochemical properties across the basin. This study provides a new insight on heat/salt fluxes, showing that 58% (32%) of the total heat eddy‐flux is ascribed to cyclonic (anticyclonic) subSIDDIES, respectively, in the eastern South Indian Ocean. Anticyclonic subSIDDIES have also been found to be the sole high‐saline water eddy‐conveyor towards the western Indian Ocean. 
PY 2018
PD AUG
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 123
IS 8
UT 000445188900021
BP 5406
EP 5425
DI 10.1029/2018JC013828
ID 55194
ER

EF