Interannual variability in the tropical western Indian Ocean

Manyilizu, M; Reason, C; Dufois, F; Penven, P

dc.creator	Manyilizu, M
dc.creator	Reason, C
dc.creator	Dufois, F
dc.creator	Penven, P
dc.date	2021-05-20T08:34:13Z
dc.date	2021-05-20T08:34:13Z
dc.date	2014
dc.date.accessioned	2022-10-20T13:09:28Z
dc.date.available	2022-10-20T13:09:28Z
dc.identifier	Manyilizu, M., Dufois, F., Penven, P., & Reason, C., (2014). Interannual variability of sea surface temperature and circulation in the tropical western Indian Ocean, African Journal of Marine Science, 36:2, 233-252, DOI: 10.2989/1814232X.2014.928651
dc.identifier	1814-232X
dc.identifier	DOI: http://dx.doi.org/10.2989/1814232X.2014.928651
dc.identifier	http://hdl.handle.net/20.500.12661/3160
dc.identifier.uri	http://hdl.handle.net/20.500.12661/3160
dc.description	Abstract. Full text article available at http://dx.doi.org/10.2989/1814232X.2014.928651
dc.description	A regional ocean model was used to study interannual variations in the Tanzanian shelf region and offshore in the tropical western Indian Ocean for the period 1980–2007. The model was forced with surface winds and heat fluxes from the National Centers for Environmental Prediction (NCEP) reanalysis, and its initial and lateral boundary conditions were derived from the Simple Ocean Data Assimilation (SODA). The weakest interannual sea surface temperature (SST) variations occurred in the coastal waters off Tanzania, where there was a strong correlation with waters to the north of Madagascar. The coastal waters were dominated by variability at a period of about 5 y. The strongest interannual SST variations occurred offshore, being dominated by two periods, one at about 2.7 y and the other at about 5 y. The variability of the region seemed to be linked to El Niño–Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) events that induced changes in the thermocline and surface heat fluxes in the region. Local surface heat flux exchanges driven by the anomalous shortwave radiation dominated the interannual SST variability in the Tanzanian shelf region, with some contribution by the advection of heat anomalies from the North-East Madagascar Current. Farther offshore, the interannual variability of the SST was dominated by the thermocline variations induced by local Ekman pumping from local wind stress curl and by remote forcing from large-scale climate modes.
dc.language	en
dc.publisher	Taylor and Francis Ltd
dc.subject	Offshore
dc.subject	Tanzanian shelf
dc.subject	Interannual variations
dc.subject	Tropical western Indian ocean
dc.subject	Simple ocean data assimilation
dc.subject	El Niño–southern oscillation
dc.subject	ENSO
dc.title	Interannual variability in the tropical western Indian Ocean
dc.type	Article