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Title:
Cooling of the South China Sea by the Toba Eruption and correlation with other climate proxies ˜71,000 years ago
Authors:
Huang, Chi-Yue; Zhao, Meixun; Wang, Chia-Chun; Wei, Ganjian
Affiliation:
AA(Department of Earth Sciences, National Chengkung University, Tainan, Taiwan), AB(Department of Earth Sciences, Dartmouth College, Hanover, NH03755, USA), AC(Department of Geology, National Taiwan University, Taipei, Taiwan), AD(Institute of Guangzhou Geochemistry, Academia Sinica, Guangzhou, China)
Publication:
Geophysical Research Letters, Volume 28, Issue 20, p. 3915-3918 (GeoRL Homepage)
Publication Date:
00/2001
Origin:
AGU
AGU Keywords:
Meteorology and Atmospheric Dynamics: Paleoclimatology, Oceanography: General: Ocean prediction, Volcanology: Ash deposits
Abstract Copyright:
(c) 2001: American Geophysical Union
DOI:
10.1029/2000GL006113
Bibliographic Code:
2001GeoRL..28.3915H

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°C 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 δ18O 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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