Sea-surface temperature reconstruction for sediment core GeoB1023-5 ...

• Main Authors: Kim, Jung-Hyun, Schneider, Ralph R, Müller, Peter J, Wefer, Gerold
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2002
• Subjects: Gravity corer Kiel type; M6/6; Meteor 1986; Geosciences, University of Bremen GeoB; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.735766; https://doi.pangaea.de/10.1594/PANGAEA.735766

Sediment core GeoB 1023-5 from the eastern South Atlantic was investigated at high temporal resolution for variations of sea-surface temperature (SST) during the past 22 kyr, using the alkenone (UK'37) method. SSTs increased by 3.5°C from about 18°C during the Last Ice Age (21±2 cal kyr BP) to about 21.5°C at 14.5 cal kyr BP. This warming trend associated with the deglaciation phase was followed by a cooling event with lowest SSTs near 20°C, persisting for about 1000 years between 13 and 12 cal kyr BP. The SSTs then continued to increase to about 22.5°C at the Holocene climatic optimum at 7 cal kyr BP, and decreased again during the Late Holocene to a core-top value of 19.8°C that is comparable to modern annual mean SST values. When compared with alkenone SST records from the eastern North Atlantic, our SST record indicates continuous warming throughout the deglaciation phase in the Benguela Current, while its northern counterpart, the Canary Current, experienced prominent cooling during 'Heinrich Event 1' ... : Supplement to: Kim, Jung-Hyun; Schneider, Ralph R; Müller, Peter J; Wefer, Gerold (2002): Interhemispheric comparison of deglacial sea-surface temperature patterns in Atlantic eastern boundary currents. Earth and Planetary Science Letters, 194(3-4), 383-393 ...