@article{fdi:010073188,
  title = {{S}ignature of {I}ndian {O}cean {D}ipole on the western boundary current of the {B}ay of {B}engal},
  author = {{S}herin, {V}. {R}. and {D}urand, {F}abien and {G}opalkrishna, {V}. {V}. and {A}nuvinda, {S}. and {C}haitanya, {A}. {V}. {S}. and {B}ourdalle-{B}adie, {R}. and {P}apa, {F}abrice},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study uses an unprecedented collection of 27 years of repeated e{X}pendable {B}athy {T}hermograph ({XBT}) sections crossing the western and north-western boundaries of the {B}ay of {B}engal ({B}o{B}). {O}ur objective is to analyse the variability of the boundary current that flows there, known as the {E}ast {I}ndia {C}oastal {C}urrent ({EICC}). {I}n the western {B}o{B}, in line with the past observational and modelling studies, our dataset confirms that the {EICC} seasonally flows poleward from {F}ebruary to {J}uly (with a peak transport of 5 {S}v), then decays and reverses to equatorward towards the equator from {O}ctober to {D}ecember (with a peak transport of 3 {S}v), reversing again to poleward in {D}ecember. {I}n the north-western {B}o{B}, the seasonal {EICC} prominently flows north-eastward, with a peak transport of 7 {S}v in {M}arch. {O}ver the rest of the climatological year, the transport remains north-westward and weak (of order 2 {S}v at most). {B}eyond the seasonal climatology, the timespan of our dataset allows us to put a special emphasis on the departures from the seasonal cycle of the {EICC} velocity and transport. {I}t is observed that this non-seasonal variability is actually larger than the seasonal climatology, so that the seasonal cycle may be completely distorted in any given year. {T}his is true in the western boundary region as well as further offshore in the central {B}o{B} and concerns the surface as well as the subsurface layers. {I}ndian {O}cean {D}ipole ({IOD}) events influence {EICC} variability, supposedly through remote forcing from the equatorial {I}ndian {O}cean and generate northward (southward) anomalous transport typically reaching 5 {S}v (7 {S}v) in winter during positive (negative) {IOD} events. {I}n addition to {IOD} events, most of the variability observed at inter-annual timescales seems to be driven by ocean turbulence. {A} comparison of our observed current with a suite of state-of-the-art ocean reanalyses and model products ({SODA}, {ORAS}4, {MERCATOR}-{ORCA}12) confirms this hypothesis, with non-eddy resolving models overestimating the wind-driven {IOD} influence on {EICC} variability. {O}ur results emphasise the benefit of a sustained long-term monitoring programme of the {EICC}, spanning the entire continental slope region up to its offshore edge, associated with a modelling approach that would be capable of accounting for the oceanic turbulence, to decipher the various processes forcing the variability of the western boundary current ({WBC}) of the {B}ay of {B}engal and their inter-play.},
  keywords = {{B}ay of {B}engal ; {M}onsoon currents ; {EICC} ; {IOD} ; {OCEAN} {INDIEN} ; {BENGALE} {GOLFE}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I} : {O}ceanographic {R}esearch {P}apers},
  volume = {136},
  numero = {},
  pages = {91--106},
  ISSN = {0967-0637},
  year = {2018},
  DOI = {10.1016/j.dsr.2018.04.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073188},
}