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

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

Title:
Regional climate control of glaciers in New Zealand and Europe during the pre-industrial Holocene
Author(s):
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.
Date:
Type:
Articles
Department:
Lamont-Doherty Earth Observatory
Volume:
5
Permanent URL:
Book/Journal Title:
Nature Geoscience
Abstract:
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.
Subject(s):
Climate change
Environmental science
Publisher DOI:
http://dx.doi.org/10.1038/ngeo1548
Item views:
131
Metadata:
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