2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool


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dc.contributor.author Oppo, Delia W.
dc.contributor.author Rosenthal, Yair
dc.contributor.author Linsley, Braddock K.
dc.date.accessioned 2010-03-03T19:49:27Z
dc.date.available 2010-03-03T19:49:27Z
dc.date.issued 2009-06-15
dc.identifier.uri http://hdl.handle.net/1912/3188
dc.description Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in Nature 460 (2009): 1113-1116, doi:10.1038/nature08233. en_US
dc.description.abstract Northern Hemisphere surface temperature reconstructions suggest that the late twentieth century was warmer than any other time during the past 500 years and possibly any time during the past 1,300 years. These temperature reconstructions are based largely on terrestrial records from extra-tropical or highelevation sites; however, global average surface temperature changes closely follow those of the global tropics, which are 75% ocean. In particular, the tropical Indo- Pacific warm pool (IPWP) represents a major heat reservoir that both influences global atmospheric circulation and responds to remote northern latitude forcings. Here we present a decadally resolved continuous sea surface temperature (SST) reconstruction from the IPWP that spans the past two millennia and overlaps the instrumental record, enabling both a direct comparison of proxy data to the instrumental record and an evaluation of past changes in the context of twentieth century trends. Our record from the Makassar Strait, Indonesia, exhibits trends that are similar to a recent Northern Hemisphere temperature reconstruction. Reconstructed SST was, however, within error of modern values during the Medieval Warm Period from about AD 1000 to AD 1250, towards the end of the Medieval Warm Period. SSTs during the Little Ice Age (approximately ad 1550–1850) were variable, and 0.5 to 1°C colder than modern values during the coldest intervals. A companion reconstruction of δ18O of sea water—a sea surface salinity and hydrology indicator— indicates a tight coupling with the East Asian monsoon system and remote control of IPWP hydrology on centennial–millennial timescales, rather than a dominant influence from local SST variation. en_US
dc.description.sponsorship This work was financially supported by the US NSF and the Ocean Climate Change Institute of WHOI. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1038/nature08233
dc.title 2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool en_US
dc.type Preprint en_US

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