@inproceedings{fdi:010063386,
  title = {{O}utline of climate and oceanographic conditions in the {I}ndian {O}cean : an update to {A}ugust 2014},
  author = {{M}arsac, {F}rancis},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n this paper, we provide an update on the trends of climate and oceanographic conditions in the {I}ndian {O}cean, at both basin and regional scales. {T}he {ENSO} cycle has been largely fluctuating between {ENSO}-neutral and {N}iña conditions during the past 4 year and is considered being in a neutral state in 2014. {F}orecast coupled models give a 58% chance that an {E}l {N}ino will develop by the end of 2014, but there is consensus that, if it does so, it will be a weak event. {T}he sea surface temperature ({SST}) of the whole {I}ndian {O}cean has increased by +0.68°{C} from the 1950s to the 2000s (50 years) and this warming is still ongoing. {I}nvestigating the patterns of inter-annual variability between the {E}ast and {W}est regions of the {I}ndian {O}cean, we found a good coherence for {SST} whereas the sea surface chlorophyll ({SSC}) had more contrasted patterns. {T}he magnitude of {SSC} anomalies is also greater in the {W}est compared to the {E}ast. {R}egional analyses for 5 sub-areas of the {I}ndian {O}cean were performed. {T}he {S}omali basin and the {M}ozambique {C}hannel are the most productive of the 5 sub-areas studied. {I}n the {S}omali basin, the {SST} pattern is not related to the {ENSO} cycle, and {SST} and {SSC} are well correlated through an inverse relationship. {N}egative {SST} anomalies and high {SSC} content were observed in 2013. {T}his area is under the influence of the {S}omalian coastal upwelling. {I}n the {M}ozambique {C}hannel, {SST} was back to the 1980-2005 average in 2012-2013 and warm anomalies appeared in 2014. {T}he {SSC} has been depleted during several years since 2008 and the depletion intensified in 2014. {T}he {W}est equatorial area ({WEQ}) and the {M}aldives ({MAL}) exhibit similar trends. {SST} was back to normal in 2013-2014, and the depth of the thermocline ({Z}20) has been around the 1980-2005 average since 2012 (in the {WEQ}) and 2013 (in {MAL}). {I}n those sub-areas, {SSC} has been depleted since the 2007 {E}l {N}iño and remained in a depleted mode since then. {T}he {E}ast tropical area is the least productive area. {T}he {SST} has varied greatly with some relation to the {ENSO} and {D}ipole cycle. {SSC} has been low since 2007 and was still in a depleted state in 2014. {T}he only dramatic enhancement in {SSC} occurred in 2011 in relation with a {L}a {N}iña event.},
  keywords = {{INTERACTION} {OCEAN} {ATMOSPHERE} ; {CLIMAT} ; {TEMPERATURE} {DE} {SURFACE} ; {ANOMALIE} {DE} {TEMPERATURE} ; {THERMOCLINE} ; {UPWELLING} ; {EL} {NINO} ; {VARIATION} {PLURIANNUELLE} ; {LA} {NINA} ; {OCEAN} {INDIEN}},
  numero = {{IOTC}-2014-{WPTT}16-24},
  pages = {15},
  booktitle = {16{\`e}me groupe de travail sur les thons tropicaux},
  year = {2014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063386},
}