noaa-ocean-2643 Equatorial Pacific ODP 806 mid-Pleistocene Uk37 Data and SST Reconstruction McClymont, E.L.; Rosell-Melé, A. Equatorial Pacific ODP 806 mid-Pleistocene Uk37 Data and SST Reconstruction 2005-07-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/2643 Investigator E.L. McClymont Investigator A. Rosell-Melé earth science paleoclimate paleoceanography age,null,null,radiocarbon year 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 alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean reconstruction earth science paleoclimate paleocean age control geoscientificInformation Sea Surface Temperature Reconstruction 1502895 14C yr BP 500000 14C yr BP 1502895 cal yr BP 500000 cal yr BP Complete .18 .32 -110.52 159.35 -3839 -2520 Ocean Pacific Ocean North Pacific Ocean ODP 806B>LATITUDE .32>LONGITUDE 159.35 Ocean Pacific Ocean North Pacific Ocean 2006-014>LATITUDE .18>LONGITUDE -110.52 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 McClymont, E.L. and A. Rosell-Melé. 2005. Links between the onset of modern Walker circulation and the mid-Pleistocene climate transition. Geology, 33( 5), 389-392.

Sea-surface temperatures (SSTs) reconstructed from Ocean Drilling Program Sites 806 and 849 in the western and eastern equatorial Pacific provide a history of the strength of the Walker circulation between 1.5 and 0.5 Ma. A progressive cooling in the eastern equatorial Pacific is paralleled by intensification of the equatorial zonal SST gradient that began 1.17 Ma, prior to the expansion of global ice volume associated with the mid-Pleistocene climate transition. The SSTs in the eastern equatorial Pacific and the zonal gradient reached modern values by 0.9 Ma. We propose that this onset and intensification of the modern Walker circulation reduced heat flux, but increased moisture transport to high latitudes, leading to the development of more extensive ice sheets and the shift toward the 100 ka world.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp849cd-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcclymont2005 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp806b2-tab.txt USA/NOAA DIF Version 9.8.4 2019-04-29 2019-04-29