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Varied Response of Western Pacific Hydrology to Climate Forcings over the Last Glacial Period

Carolin, Stacy A. and Cobb, Kim M. and Adkins, Jess F. and Clark, Brian and Conroy, Jessica L. and Lejau, Syria and Malang, Jenny and Tuen, Andrew A. (2013) Varied Response of Western Pacific Hydrology to Climate Forcings over the Last Glacial Period. Science, 340 (6140). pp. 1564-1566. ISSN 0036-8075.

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Atmospheric deep convection in the west Pacific plays a key role in the global heat and moisture budgets, yet its response to orbital and abrupt climate change events is poorly resolved. Here, we present four absolutely dated, overlapping stalagmite oxygen isotopic records from northern Borneo that span most of the last glacial cycle. The records suggest that northern Borneo’s hydroclimate shifted in phase with precessional forcing but was only weakly affected by glacial-interglacial changes in global climate boundary conditions. Regional convection likely decreased during Heinrich events, but other Northern Hemisphere abrupt climate change events are notably absent. The new records suggest that the deep tropical Pacific hydroclimate variability may have played an important role in shaping the global response to the largest abrupt climate change events.

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Adkins, Jess F.0000-0002-3174-5190
Additional Information:© 2013 American Association for the Advancement of Science. Received 7 December 2012; accepted 21 May 2013 Published online 6 June 2013. We thank N. Meckler, J. Partin, and S. Clark (Gunung Mulu National Park) for field assistance; J. Partin for assistance in sample analysis; G. Paris, M. Raven, S. Hines, and A. Subhas for assistance in U-Th dating; and J. Lynch-Stieglitz for providing comments on early versions of the manuscript. S.A.C, K.M.C., and J.F.A. were involved in the writing and design of this study; A.A.T. and B.C. facilitated the fieldwork for this study; S.A.C, K.M.C., S.L., and J.M. collected samples; and S.A.C. analyzed the samples. The research was funded by NSF PECASE Award no. 0645291 to K.M.C., NSF AGS award no. 0903099 to J.F.A., and a NSF Graduate Research Fellowship to S.A.C. Permits for this work were granted by the Malaysian Economic Planning Unit, the Sarawak State Planning Unit, and the Sarawak Forestry Department. All data reported in this paper are archived at the National Climatic Data Center ( paleo/speleothem/pacific/borneo2013.txt).
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NSF Graduate Research FellowshipUNSPECIFIED
Issue or Number:6140
Record Number:CaltechAUTHORS:20130806-094742879
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39775
Deposited By: Tony Diaz
Deposited On:06 Aug 2013 20:06
Last Modified:24 Feb 2020 10:30

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