noaa-ocean-15108 Kuroshio Extension Plio-Pleistocene Alkenone SST Reconstruction Venti, N.L.; Billups, K.; Herbert, T.D. Kuroshio Extension Plio-Pleistocene Alkenone SST Reconstruction 2013-09-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15108 Investigator N.L. Venti Investigator K. Billups Investigator T.D. Herbert earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,core top depth earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,radiocarbon kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,core recovery percent earth science paleoclimate paleocean reconstruction geoscientificInformation Sea Surface Temperature Reconstruction 3000000 14C yr BP 1760000 14C yr BP 3000000 cal yr BP 1760000 cal yr BP Complete 36.127 36.127 158.2016 158.2016 -3346 -3346 Ocean Pacific Ocean North Pacific Ocean ODP 1208>LATITUDE 36.127>LONGITUDE 158.2016 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 Venti, N.L., K. Billups, and T.D. Herbert 2013 Earth and Planetary Science Letters 384 121-131 10.1016/j.epsl.2013.10.007

Insolation-driven changes in poleward heat transport and changes in greenhouse gas concentrations can explain aspects of the rise of obliquity-paced climate variability during the Pliocene-Pleistocene transition. Based on an alkenone-based sea surface temperature (SST) reconstruction of the Kuroshio Current Extension (KCE), we propose here that emergence of this region as the primary locus of ocean-atmosphere heat transfer in the Pacific Ocean promoted Northern Hemisphere Glaciation (NHG). Our record shows that with intensification of NHG at 2.7 Ma, the KCE cooled 2-4°C during glacial intervals, likely in NH winter/spring. These high-amplitude 41-kyr SST cycles slightly lead d18O variations, ruling out global ice-volume changes as the primary cause. The lead of SST over d18O cycles matches the phasing between these two proxies observed in the tropics, supporting changes in CO2 concentrations as a unifying mechanism of ocean surface temperature change. However, the! amplitude of the KCE SST cycle is twice that of the tropical records, pointing to an additional, regional process. We infer that cooling of the North Pacific sea surface by the East Asian winter monsoon and associated westerlies intensified during glacial intervals. This transfer of heat and moisture from the ocean to the atmosphere potentially furthered glacial formation by accelerating snow fall in North America. Therefore, these results might also support a role for tropical-extratropical heat balance in enhancing glacial growth via the obliquity pacing. STUDY NOTES: These are alkenone-based sea surface temperature estimates from ODP Site 1208, measured via gas chromatography on the total lipid extract. Some 500 sampling intervals were measured at 10 cm resolution (2500 year time step) through the Plio-Pleistocene interval (86-136 mbsf; 1.76-3.00 Ma).

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/venti2013-epsl/venti2013-epsl.txt Formatted Text File; SST Reconstruction USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11