noaa-ocean-26550 Indo-Pacific Warm Pool 450,000 Year Alkenone Temperature Reconstructions Windler, G.; Tierney, J.E.; DiNezio, P.N.; Gibson, K.A.; Thunell, R.C. Indo-Pacific Warm Pool 450,000 Year Alkenone Temperature Reconstructions 2019-04-22 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26550 Investigator G. Windler Investigator J.E. Tierney Investigator P.N. DiNezio Investigator K.A. Gibson Investigator R.C. Thunell earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation 449740 cal yr BP 920 cal yr BP Complete -6.328 -6.328 103.879 103.879 -1796 -1796 Ocean Indian Ocean MD98-2152>LATITUDE -6.328>LONGITUDE 103.879 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Grace Windler, Jessica E. Tierney, Pedro N. DiNezio, Kelly Gibson, Robert Thunell 2019 Earth and Planetary Science Letters 516 66-76 10.1016/j.epsl.2019.03.038 https://www.sciencedirect.com/science/article/pii/S0012821X19301931

The Indo-Pacific Warm Pool is the largest source of heat and rainfall on Earth, but the mechanisms driving long-term climate variability in this region remain uncertain. Some studies suggest that precessional variations in insolation exert a primary role; alternatively, sea level change may be more important, with exposure of the Sunda and Sahul shelves leading to weakened Walker circulation across the Indian Ocean during glacial periods. The limited number of paleoclimate records from the warm pool that extend beyond the Last Glacial Maximum makes it difficult to test these competing hypotheses. Here, we present a 450,000-year long reconstruction of sea surface temperatures, sub-surface temperatures, and regional vegetation from southern Sumatra. We show that the dominant signal in each record is the 100 ky glacial cycle. We find that both surface and sub-surface temperatures cool during glacial periods, but the sub-surface cools more, reflecting a shoaling of the thermocline. Southern Sumatra and western Java consistently exhibit increased C4 grass coverage and an enhanced dry season during glacial periods. The observed changes in the thermocline and rainfall seasonality are consistent with the shelf exposure mechanism, suggesting that sea level changes exert a prominent role in warm pool climate over glacial-interglacial timescales. STUDY NOTES: Alkenone temperature, biomarker, and carbon isotope data from Indian Ocean core MD98-2152 for the past 450kyr.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/windler2019/windler2019.txt NOAA Template File; MD98-2152 Alkenone Temperature, Biomarker, and d13C Data USA/NOAA DIF Version 9.8.4 2019-04-22 2019-04-22