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Interglacial Hydroclimate in the Tropical West Pacific Through the Late Pleistocene

Meckler, A. N. and Clarkson, M. O. and Cobb, K. M. and Sodemann, H. and Adkins, J. F. (2012) Interglacial Hydroclimate in the Tropical West Pacific Through the Late Pleistocene. Science, 336 (6086). pp. 1301-1304. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20120622-151730519

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Abstract

Records of atmospheric carbon dioxide concentration (Pco_2) and Antarctic temperature have revealed an intriguing change in the magnitude of interglacial warmth and Pco_2 at around 430,000 years ago (430 ka), but the global climate repercussions of this change remain elusive. Here, we present a stalagmite-based reconstruction of tropical West Pacific hydroclimate from 570 to 210 ka. The results suggest similar regional precipitation amounts across the four interglacials contained in the record, implying that tropical hydroclimate was insensitive to interglacial differences in Pco_2 and high-latitude temperature. In contrast, during glacial terminations, drying in the tropical West Pacific accompanied cooling events in northern high latitudes. Therefore, the tropical convective heat engine can either stabilize or amplify global climate change, depending on the nature of the climate forcing.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.1218340 DOIUNSPECIFIED
http://www.sciencemag.org/content/336/6086/1301PublisherUNSPECIFIED
Additional Information:© 2012 American Association for the Advancement of Science. 22 December 2011; accepted 19 April 2012; Published online 3 May 2012. We thank B. Clark, S. Lejau, and J. Malang of Mulu National Park, as well as J. Partin for assistance in the field. A. Tuen (Universiti Malaysia Sarawak) greatly facilitated fieldwork in Sarawak. N. Sharma and K. Stewart are acknowledged for assistance with stable isotope measurements. D. Lund, A. Subhas, and D. Fernandez are thanked for assistance and advice with U-Th dating. J. Eiler provided access to his facilities at the California Institute of Technology. Support for this work was provided by the Swiss National Science Foundation (SNF) and the German Research Foundation (DFG) through postdoctoral fellowships to A.N.M.; by the US NSF through grants ATM-0318445 and ATM-0903099 to J.F.A, as well as ATM-0645291 to K.M.C.; and by an Edinburgh University Principal’s Career Development Ph.D. Scholarship to M.O.C.
Funders:
Funding AgencyGrant Number
Swiss National Science Foundation (SNF)UNSPECIFIED
German Research Foundation (DFG) UNSPECIFIED
NSFATM-0318445
NSFATM-0903099
NSFATM-0645291
Edinburgh University Principal’s Career Development Ph.D. ScholarshipUNSPECIFIED
Issue or Number:6086
Record Number:CaltechAUTHORS:20120622-151730519
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120622-151730519
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32048
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:22 Jun 2012 22:48
Last Modified:03 Oct 2019 03:57

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