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    The influence of Indian Ocean atmospheric circulation on Warm Pool hydroclimate during the Holocene epoch

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    2012JD018060.pdf (906.7Kb)
    Date
    2012-10-04
    Author
    Tierney, Jessica E.  Concept link
    Oppo, Delia W.  Concept link
    LeGrande, Allegra N.  Concept link
    Huang, Yongsong  Concept link
    Rosenthal, Yair  Concept link
    Linsley, Braddock K.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5587
    As published
    https://doi.org/10.1029/2012JD018060
    DOI
    10.1029/2012JD018060
    Keyword
     Holocene climate; Indian monsoon; Indo-Pacific warm pool; Leaf waxes; Stable isotopes; Walker circulation 
    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
    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.
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    • Geology and Geophysics (G&G)
    Suggested Citation
    Journal of Geophysical Research 117 (2012): D19108
     

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