noaa-ocean-25611 Eastern Equatorial Pacific d18O and d13C Data from the Last Glacial Maximum Ford, H.L.; McChesney, C.L.; Hertzberg, J.E.; McManus, J.F. Eastern Equatorial Pacific d18O and d13C Data from the Last Glacial Maximum 2018-11-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25611 Investigator H.L. Ford Investigator C.L. McChesney Investigator J.E. Hertzberg Investigator J.F. McManus earth science paleoclimate paleoceanography delta 13C,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,site name earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,reference for sample earth science paleoclimate paleoceanography delta 18O,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina dutertrei,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,planktic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,LGM-Holocene subsurface d18O values earth science paleoclimate paleoceanography delta 18O,planktic foraminifer,null,per mil PDB,null,paleoceanography,differenced,null,N,LGM-Holocene subsurface-surface d18O gradient earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,Time years of sample earth science paleoclimate paleoceanography sample identification,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography longitude,null,null,degree east,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia menardii,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography collection water depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Pulleniatina obliquiloculata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Pulleniatina obliquiloculata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,planktic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,LGM-Holocene surface d18O values earth science paleoclimate paleoceanography delta 13C,Neogloboquadrina dutertrei,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia menardii,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography latitude,null,null,degree north,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation Last Glacial Maximum 24734 cal yr BP 0 cal yr BP Complete -5.517 8.2055 -110.5197 -81.583 Ocean Pacific Ocean Eastern Pacific Ocean ODP 849, 07MC-08JC, 09MC-17JC>LATITUDE >LONGITUDE Ocean Pacific Ocean Eastern Pacific Ocean Eastern Equatorial Pacific Synthesis Set>LATITUDE >LONGITUDE 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Ford, H.L., C.L. McChesney, J.E. Hertzberg, and J.F. McManus 2018 Geophysical Research Letters 45 10.1029/2018GL079710

The mean state and variability of the tropical Pacific is influenced by the depth of the thermocline. During the Last Glacial Maximum (~21,000 years ago), the zonal sea surface temperature gradient across the equatorial Pacific was reduced and productivity was generally lower than modern. To understand the thermocline depth's role in determining the Last Glacial Maximum tropical mean state, we reconstruct the upper ocean d18O profile from multiple species of planktic foraminifera. We synthesize existing records of surface and subsurface dwelling foraminifera to reconstruct the vertical d18O gradient throughout the eastern equatorial Pacific. We find the thermocline was deeper during the Last Glacial Maximum than the Holocene throughout the eastern equatorial Pacific region. The thermocline depth's role in the dynamic forcing of the cold tongue contributed to the reduced zonal SST gradient across the equatorial Pacific, decreased productivity, and presumably impacted El Niño-Southern Oscillation variability relative to the Holocene.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ford2018/ford2018-849-08jc-17jc.txt NOAA Template File; ODP 849, Cocos Ridge, Carnegie Ridge d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ford2018/ford2018-synthesis.txt NOAA Template File; Eastern Equatorial Pacific Synthesis of d18O Data USA/NOAA DIF Version 9.8.4 2019-04-29 2019-04-29