noaa-ocean-18915 Western Equatorial Pacific Pliocene Mg/Ca and Subsurface Temperature Ford, H.L.; Ravelo, A.C.; Dekens, P.S.; LaRiviere, J.P.; Wara, M.W. Western Equatorial Pacific Pliocene Mg/Ca and Subsurface Temperature 2015-06-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18915 Investigator H.L. Ford Investigator A.C. Ravelo Investigator P.S. Dekens Investigator J.P. LaRiviere Investigator M.W. Wara earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia tumida,null,millimole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,sample info earth science paleoclimate paleoceanography age,null,null,million years ago,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Mohtani et al. 2011 calibration; based on Globorotalia tumida (depth habitat ~50-100m) earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean reconstruction geoscientificInformation 4807253 cal yr BP 24000 cal yr BP Complete .318333 .318333 159.361667 159.361667 -2520 -2520 Ocean Pacific Ocean Western Pacific Ocean ODP 806>LATITUDE .318333>LONGITUDE 159.361667 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 Heather L. Ford, A. Christina Ravelo, Petra S. Dekens, Jonathan P. LaRiviere and Michael W. Wara 2015 Geophysical Research Letters 42 10.1002/2015GL064215 http://onlinelibrary.wiley.com/doi/10.1002/2015GL064215/full

The tropical Pacific thermocline strength, depth, and tilt are critical to tropical mean state and variability. During the early Pliocene (~3.5 to 4.5 Ma), the Eastern Equatorial Pacific (EEP) thermocline was deeper and the cold tongue was warmer than today, which resulted in a mean state with a reduced zonal sea surface temperature gradient or El Padre. However, it is unclear whether the deep thermocline was a local feature of the EEP or a basin-wide condition with global implications. Our measurements of Mg/Ca of Globorotalia tumida in a western equatorial Pacific site indicate Pliocene subsurface temperatures warmer than today; thus, El Padre included a basin-wide thermocline that was relatively warm, deep, and weakly tilted. At ~4 Ma, thermocline steepening was coupled to cooling of the cold tongue. Since ~4 Ma, the basin-wide thermocline cooled/shoaled gradually, with implications for thermocline feedbacks in tropical dynamics and the interpretation of TEX86-derived temperatures. STUDY NOTES: Mg/Ca values from Globorotalia tumida and reconstructed subsurface temperature from Western Pacific Warm Pool ODP Site 806.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ford2015b/ford2015b.txt Data File; ODP806 G. tumida Mg/Ca and Subsurface Temperature USA/NOAA DIF Version 9.8.4 2019-04-29 2019-04-29