Delcroix Thierry, Radenac Marie-Hélène, Cravatte Sophie, Alory G., Gourdeau L., Léger F., Singh A., Varillon David. (2014). Sea surface temperature and salinity seasonal changes in the western Solomon and Bismarck Seas. Journal of Geophysical Research : Oceans, 119 (4), p. 2642-2657. ISSN 2169-9275.
Titre du document
Sea surface temperature and salinity seasonal changes in the western Solomon and Bismarck Seas
Année de publication
Delcroix Thierry, Radenac Marie-Hélène, Cravatte Sophie, Alory G., Gourdeau L., Léger F., Singh A., Varillon David
Journal of Geophysical Research : Oceans, 2014,
119 (4), p. 2642-2657 ISSN 2169-9275
We analyze mean and seasonal change of Sea Surface Temperature (SST) and Salinity (SSS) in the Solomon and Bismarck Seas, using 1977-2009 in situ data collected from Voluntary Observing Ships. Covariability of these two variables with surface wind, altimeter-derived and model-derived horizontal currents, precipitation, and Sepik River discharge are examined. SST and SSS show large annual oscillations in the Solomon Sea, with the coldest and saltiest waters occurring in July/August mainly due to horizontal advection. In contrast, they show large semiannual oscillations in the Bismarck Sea. There, the coldest and saltiest waters happen in January/February, when the northwest monsoon winds drive coastal upwelling, and in July/August, when the New Guinea Coastal Current advects cold and high-salinity waters from the Solomon Sea through Vitiaz Strait. The low SSS values observed in April/May, stuck between the January/February and July/August SSS maxima, are further enhanced by the Sepik River discharge annual maximum. A high-resolution model strengthens the conclusions we derive from observations. The impacts of ENSO on SST and SSS are also discussed with, for instance, saltier-than-average and fresher-than-average waters during the 2002-2003 El Nino and 2007-2008 La Nina, respectively.
Plan de classement
Climatologie / Météorologie [032CLIMET]
INTERACTION OCEAN ATMOSPHERE ; TEMPERATURE DE SURFACE ; SALINITE ; COURANT GEOSTROPHIQUE ; ADVECTION MARINE ; UPWELLING ; EL NINO ; PRECIPITATION ; VENT ; ESTUAIRE ; VARIATION MENSUELLE ; VARIATION SAISONNIERE ; VARIATION ANNUELLE
PACIFIQUE ; SALOMON ; BISMARCK ; PAPOUASIE NOUVELLE GUINEE
Fonds IRD [F B010062177]