The influence of Indian Ocean atmospheric circulation on Warm Pool hydroclimate during the Holocene epoch
Citable URI
https://hdl.handle.net/1912/5587As published
https://doi.org/10.1029/2012JD018060DOI
10.1029/2012JD018060Keyword
Holocene climate; Indian monsoon; Indo-Pacific warm pool; Leaf waxes; Stable isotopes; Walker circulationAbstract
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
Description
Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 117 (2012): D19108, doi:10.1029/2012JD018060.
Collections
Suggested Citation
Journal of Geophysical Research 117 (2012): D19108Related items
Showing items related by title, author, creator and subject.
-
Indian monsoon variations during three contrasting climatic periods : the Holocene, Heinrich Stadial 2 and the last interglacial-glacial transition
(2015-06)In contrast to the East Asian and African monsoons the Indian monsoon is still poorly documented throughout the last climatic cycle (last 135,000 years). Pollen analysis from two marine sediment cores (NGHP-01-16A and ... -
Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
(Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-06)The Indian monsoon affects the livelihood of over one billion people. Despite the importance of climate to society, knowledge of long-term monsoon variability is limited. This thesis provides Holocene records of monsoon ... -
Using the Helmholtz decomposition to define the Indian Ocean meridional overturning streamfunction
(American Meteorological Society, 2020-03-02)The zonally integrated flow in a basin can be separated into the divergent/nondivergent parts, and a uniquely defined meridional overturning circulation (MOC) can be calculated. For a basin with significant volume exchange ...
