Sea surface temperature and salinity reconstruction of sediment core GeoB3129-1 ...

• Main Authors: Weldeab, Syee, Schneider, Ralph R, Kölling, Martin
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2006
• Subjects: Gravity corer Kiel type; JOPSII-6; M34/4; Victor Hensen; Meteor 1986; Center for Marine Environmental Sciences MARUM; Geosciences, University of Bremen GeoB; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.738284; https://doi.pangaea.de/10.1594/PANGAEA.738284

A sediment core from the western tropical Atlantic covering the last 21,000 yr has been analysed for centennial scale reconstruction of sea surface temperature (SST) and ice volume-corrected oxygen isotopic composition of sea water (delta18O(ivc-sw)) using Mg / Ca and delta18O of the shallow dwelling planktonic foraminifer Globigerinoides ruber (white). At a period between 15.5 and 17.5 kyr BP, the Mg / Ca SST and delta18O(ivc-sw), a proxy for sea surface salinity (SSS), reveals a warming of around 2.5 °C along with an increase in salinity. A second period of pronounced warming and SSS increase occurred between 11.6 and 13.5 kyr BP. Within age model uncertainties, both warming intervals were synchronous with air temperature increase over Antarctica and ice retreat in the southern South Atlantic and terminated with abrupt centennial scale SSS decrease and slight SST cooling in conjunction with interglacial reactivation of the meridional overturning circulation (MOC). We suggest that during these warm ... : Supplement to: Weldeab, Syee; Schneider, Ralph R; Kölling, Martin (2006): Deglacial sea surface temperature and salinity increase in the western tropical Atlantic in synchrony with high latitude climate instabilities. Earth and Planetary Science Letters, 241, 699-706 ...