Academic Commons


Regional climate control of glaciers in New Zealand and Europe during the pre-industrial Holocene

Putnam, Aaron Ervin; Schaefer, Joerg M.; Denton, George H.; Barrell, David J. A.; Finkel, Robert; Schwartz, Roseanne G.; Andersen, Bjørn G.; Chinn, Trevor J. H.; Doughty, Alice M.

Existing paleoclimate data suggest a complex evolution of hydroclimate within the Indo-Pacific Warm Pool (IPWP) during the Holocene epoch. Here we introduce a new leaf wax isotope record from Sulawesi, Indonesia and compare proxy water isotope data with ocean-atmosphere general circulation model (OAGCM) simulations to identify mechanisms influencing Holocene IPWP hydroclimate. Modeling simulations suggest that orbital forcing causes heterogenous changes in precipitation across the IPWP on a seasonal basis that may account for the differences in time-evolution of the proxy data at respective sites. Both the proxies and simulations suggest that precipitation variability during the September–November (SON) season is important for hydroclimate in Borneo. The preëminence of the SON season suggests that a seasonally lagged relationship between the Indian monsoon and Indian Ocean Walker circulation influences IPWP hydroclimatic variability during the Holocene.


  • thumnail for Putnam_2012Nature_Geoscience.pdf Putnam_2012Nature_Geoscience.pdf application/x-pdf 3.62 MB Download File

More Information

Published In
Nature Geoscience
Publisher DOI
627 - 630
Academic Units
Lamont-Doherty Earth Observatory
Academic Commons provides global access to research and scholarship produced at Columbia University, Barnard College, Teachers College, Union Theological Seminary and Jewish Theological Seminary. Academic Commons is managed by the Columbia University Libraries.