@article{fdi:010074108, title = {{SIDDIES} {C}orridor : a major east-west pathway of long-lived surface and subsurface eddies crossing the subtropical {S}outh {I}ndian {O}cean}, author = {{D}ilmahamod, {A}. {F}. and {A}guiar-{G}onzalez, {B}. and {P}enven, {P}ierrick and {R}eason, {C}. {J}. {C}. and {D}e {R}uijter, {W}. {P}. {M}. and {M}alan, {N}. and {H}ermes, {J}. {C}.}, editor = {}, language = {{ENG}}, abstract = {{S}outh {I}ndian {O}cean eddies ({SIDDIES}), originating from a high evaporation region in the eastern {I}ndian {O}cean, are investigated by tracking individual eddies from satellite data and co-located {A}rgo floats. {A} subsurface-eddy identification method, based on its steric dynamic height anomaly, is devised to assign {A}rgo profiles to surface eddies (surf{SIDDIES}) or subsurface eddies (sub{SIDDIES}). {T}hese westward-propagating, long-lived features (>3 months) prevail over a preferential latitudinal band, forming a permanent structure linking the eastern to the western {I}ndian {O}cean, that we call the '{SIDDIES} {C}orridor'. {K}ey features have been revealed in the mean thermohaline vertical structure of these eddies. {A}nticyclonic {SIDDIES} are characterized by positive subsurface salinity anomalies, with sub{SIDDIES} not exhibiting negative surface anomalies, as opposed to surf{SIDDIES}. {C}yclonic sub{SIDDIES} also occur, but their related salinity anomalies are weaker. {S}ub{SIDDIES} exhibit two cores of different temperature polarities in their surface and subsurface levels. {C}yclonic sub{SIDDIES} have their cores at around 150-200 m depth along the 25.4-25.8 kg m(-3) potential density layer with anticyclonic sub{SIDDIES} having their cores at 250-300 m along the 26-26.4 kg m(-3) density layer. {T}he {SIDDIES} corridor acts as a zonal pathway for both eddy-types to advect water masses and biogeochemical properties across the basin. {T}his study provides a new insight on heat/salt fluxes, showing that 58% (32%) of the total heat eddy-flux is ascribed to cyclonic (anticyclonic) sub{SIDDIES}, respectively, in the eastern {S}outh {I}ndian {O}cean. {A}nticyclonic sub{SIDDIES} have also been found to be the sole high-saline water eddy-conveyor toward the western {I}ndian {O}cean. {K}ey {P}oints}, keywords = {{S}outh {I}ndian {O}cean ; eddy corridor ; surface and subsurface eddies ; long-lived eddies ; eddy demography ; heat ; freshwater fluxes ; {OCEAN} {INDIEN}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans}, volume = {123}, numero = {8}, pages = {5406--5425}, ISSN = {2169-9275}, year = {2018}, DOI = {10.1029/2018jc013828}, URL = {https://www.documentation.ird.fr/hor/fdi:010074108}, }