Younger Dryas-Holocene temperature and rainfall history of southern Indonesia from δ18O in speleothem calcite and fluid inclusions

被引：63

作者：

Griffiths, Michael L. ^{[1
]}

Drysdale, Russell N. ^{[1
]}

Vonhof, Hubert B. ^{[2
]}

Gagan, Michael K. ^{[3
]}

Zhao, Jian-xin ^{[4
]}

Ayliffe, Linda K. ^{[3
]}

Hantoro, Wahyoe S. ^{[5
]}

Hellstrom, John C. ^{[6
]}

Cartwright, Ian ^{[7
]}

Frisia, Silvia ^{[1
]}

Suwargadi, Bambang W. ^{[5
]}

机构：

[1] Univ Newcastle, Environm & Climate Change Grp, Callaghan, NSW 2308, Australia

[2] Vrije Univ Amsterdam, Fac Earth & Life Sci, NL-1081 HV Amsterdam, Netherlands

[3] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia

[4] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

[5] Indonesian Inst Sci, Res & Dev Ctr Geotechnol, Bandung 40135, Indonesia

[6] Univ Melbourne, Sch Earth Sci, Parkville, Vic 2010, Australia

[7] Monash Univ, Sch Geosci, Clayton, Vic 3800, Australia

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2010年 / 295卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

fluid inclusions; speleothem; Indonesia; monsoon; stable isotopes; Younger Dryas; INTERTROPICAL CONVERGENCE ZONE; HIGH-RESOLUTION; SURFACE-TEMPERATURE; ASIAN MONSOON; WATER; STALAGMITE; ISOTOPE; RECORD; OCEAN;

D O I：

10.1016/j.epsl.2010.03.018

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

070403 [天体物理学]; 070902 [地球化学];

摘要：

We have applied a new technique to analyze the oxygen (delta O-18 and hydrogen (delta D) isotope ratios in speleothem fluid inclusions to reconstruct the temperature and rainfall history of southern Indonesia during the Younger Dryas (YD) event and the Holocene. The 12,640-year speleothem record, anchored by 33 uranium-series dates, shows that fluid-inclusion delta O-18 values vary in phase with speleothem calcite delta O-18 during the Holocene, suggesting that the speleothem calcite delta O-18 primarily reflects variations in the delta O-18 of local rainfall. Significant early to mid-Holocene decreases in both delta O-18 series are interpreted as an intensification of Australian-Indonesian summer monsoon rainfall in response to deglacial eustatic sea-level rise and flooding of the Sunda Shelf. Cave drip-water temperatures reconstructed from coupled measurements of delta O-18 in speleothem calcite and fluid inclusions remained relatively constant through the Holocene. This is consistent with reconstructions of Indo-Pacific sea-surface temperature (SST) based on analysis of Mg/Ca ratios in planktonic foraminifera. However, during the YD event, drip-water (i.e. cave) temperature was similar to 5 degrees C cooler than modern, which is substantially cooler than SSTs inferred from foraminiferal Mg/Ca, but consistent with coral Sr/Ca reconstructions of SST and terrestrial evidence for high-elevation snow-line depressions. Lower fluid-inclusion delta O-18 values during the YD indicate that the cooling was accompanied by increased monsoon rainfall. Taken together, the results suggest that the southerly penetration of the intertropical convergence zone (ITCZ) was largely influenced by the cross-equatorial temperature gradient, rather than local SSTs (and air temperatures). Our results provide new evidence for a rapid cooling of deep tropical air temperatures and repositioning of the ITCZ during the YD event. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：30 / 36

页数：7

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