Cooling of the South China Sea by the Toba eruption and correlation with other climate proxies similar to 71,000 years ago

Type Article
Date 2001-10
Language English
Author(s) Huang Cy1, Zhao M2, Wang Cc3, Wei Gj4
Affiliation(s) 1 : Natl Cheng Kung Univ, Dept Earth Sci, Tainan, Taiwan.
2 : Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA.
3 : Natl Taiwan Univ, Dept Geol, Taipei, Taiwan.
4 : Acad Sinica, Inst Guangzhou Geochem, Guangzhou 510640, Peoples R China.
Source Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2001-10 , Vol. 28 , N. 20 , P. 3915-3918
DOI 10.1029/2000GL006113
WOS© Times Cited 33
Keyword(s) Paleoclimatology, Ocean prediction, Volcanoclastic deposits
Abstract The Toba tephra layer has been identified in core MD972151 in the southern South China Sea (SCS), northeast of the Indonesia Toba caldera. This affords us an opportunity to directly determine a 1 degreesC cooling for ca.l kyr on the SCS following the Toba eruption (71 Ka) during the marine isotope stage 5a-4 transition, using century-scale sea surface temperature records. This cooling event in the SCS is well correlated with several coeval proxies such as increased East Asia winter monsoon intensity, increased ice-rafted detritus in the North Pacific Ocean sediments, and decreased delta O-18 in Greenland ice core. Such correlation suggests a climate change where cold climate signals originated in the Northern Hemisphere ice sheets, transferred southward by the winter monsoon, and cooled the SCS.
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