Western Pacific hydroclimate linked to global climate variability over the past two millennia
AuthorGriffiths, Michael L.
Kimbrough, Alena K.
Gagan, Michael K.
Drysdale, Russell N.
Cole, Julia E.
Johnson, Kathleen R.
Cook, Benjamin I.
Hellstrom, John C.
Hantoro, Wahyoe S.
AffiliationUniv Arizona, Dept Geosci
Univ Arizona, Dept Atmospher Sci
MetadataShow full item record
PublisherNATURE PUBLISHING GROUP
CitationWestern Pacific hydroclimate linked to global climate variability over the past two millennia 2016, 7:11719 Nature Communications
RightsThis work is licensed under a Creative Commons Attribution 4.0 International License
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractInterdecadal modes of tropical Pacific ocean-atmosphere circulation have a strong influence on global temperature, yet the extent to which these phenomena influence global climate on multicentury timescales is still poorly known. Here we present a 2,000-year, multiproxy reconstruction of western Pacific hydroclimate from two speleothem records for southeastern Indonesia. The composite record shows pronounced shifts in monsoon rainfall that are antiphased with precipitation records for East Asia and the central-eastern equatorial Pacific. These meridional and zonal patterns are best explained by a poleward expansion of the Australasian Intertropical Convergence Zone and weakening of the Pacific Walker circulation (PWC) between similar to 1000 and 1500 CE Conversely, an equatorward contraction of the Intertropical Convergence Zone and strengthened PWC occurred between similar to 1500 and 1900 CE. Our findings, together with climate model simulations, highlight the likelihood that century-scale variations in tropical Pacific climate modes can significantly modulate radiatively forced shifts in global temperature.
VersionFinal published version
SponsorsAustralian Research Council Discovery [DP0663274, DP1095673]; NOAA/UCAR Climate and Global Change Postdoctoral Fellowship; William Paterson University; Lewis and Clark College Mellon Research Initiative Fellowship; US NSF