@article{fdi:010049602,
  title = {{O}bserved intra-seasonal to interannual variability of the upper ocean thermal structure in the southeastern {A}rabian {S}ea during 2002-2008},
  author = {{G}opalakrishna, {V}.{V}. and {D}urand, {F}abien and {N}isha, {K}. and {L}engaigne, {M}athieu and {B}oyer, {T}. {P}. and {C}osta, {J}. and {R}ao, {R}. {R}. and {R}avichandran, {M}. and {A}mrithash, {S}. and {J}ohn, {L}. and {G}irish, {K}. and {R}avichandran, {C}. and {S}uneel, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he southeastern {A}rabian {S}ea ({SEAS}), located in the {I}ndian {O}cean warm pool, is a key-region of the regional climate system. {I}t is suspected to play an important role in the dynamics of the {A}sian summer monsoon system. {T}he present study reports the salient features derived from a newly harvested observational dataset consisting of repeated fortnightly {XBT} transects in the {SEAS} over the period 2002-2008. {T}he fortnightly resolution of such a multi-year record duration is unprecedented in this part of the world ocean and provides a unique opportunity to examine the observed variability of the near-surface thermal structure over a wide spectrum, from intra-seasonal to interannual timescales. {W}e find that most of the variability is trapped in the thermocline, taking the form of upwelling and downwelling motions of the thermal stratification. {T}he seasonal variations are consistent with past studies and confirm the role of the monsoonal wind forcing through linear baroclinic waves (coastally-trapped {K}elvin and planetary {R}ossby waves). {S}ub-seasonal variability takes the form of anomalous events lasting a few weeks to a few months and occurs at two preferred timescales: in the 30-110 day band, within the frequency domain of the {M}adden-{J}ulian oscillation and in the 120-180 day band. {W}hile this sub-seasonal variability appears fairly barotropic in the offshore region, the sign of the anomaly in the upper thermocline is opposite to that in its lower part on many occasions along the coast. {O}ur dataset also reveals relatively large interannual temperature variations of about 1 degrees {C} from 50 to 200 m depth that reflect a considerable year-to-year variability of the magnitude of both upwelling and downwelling events. {T}his study clearly demonstrates the necessity for sustained long-term temperature measurements in the {SEAS}.},
  keywords = {{XBT} data ; {A}rabian {S}ea ; {L}akshadweep {S}ea ; {I}nterannual variability ; {I}ntra-seasonal variability ; {WICC}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I} - {O}ceanographic {R}esearch {P}apers},
  volume = {57},
  numero = {6},
  pages = {739--754},
  ISSN = {0967-0637},
  year = {2010},
  DOI = {10.1016/j.dsr.2010.03.010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049602},
}