noaa-ocean-17351 Northern Hemisphere Benthic Foraminiferal Trace Metals and Stable Isotopes Data from the late Pliocene and the Holocene to the Last Glacial Maximum Woodard, S.C.; Rosenthal, Y.; Miller, K.G.; Wright, J.D.; Chiu, B.K.; Lawrence, K.T. Northern Hemisphere Benthic Foraminiferal Trace Metals and Stable Isotopes Data from the late Pliocene and the Holocene to the Last Glacial Maximum 2014-10-24 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17351 Investigator S.C. Woodard Investigator Y. Rosenthal Investigator K.G. Miller Investigator J.D. Wright Investigator B.K. Chiu Investigator K.T. Lawrence earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Uvigerina sp.,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography delta 18O,Uvigerina sp.,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography magnesium/calcium,Uvigerina sp.,null,millimole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate paleoceanography aluminum/calcium,Uvigerina sp.,null,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate paleoceanography iron/calcium,Uvigerina sp.,null,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate paleocean trace metals in carbonates earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 33778 cal yr BP 2400 cal yr BP Complete 36.127 43 -32.950122 158.2016 -3427 -3346 Ocean Atlantic Ocean North Atlantic Ocean DSDP 607>LATITUDE 41.000019>LONGITUDE -32.950122 Ocean Atlantic Ocean North Atlantic Ocean CHN82-63>LATITUDE 43>LONGITUDE -31 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Woodard, S.C., Y. Rosenthal, K.G. Miller, J.D. Wright, B.K. Chiu, and K.T. Lawrence 2014 Science 10.1126/science.1255586

Earth’s climate underwent a major transition from the warmth of the late Pliocene, when global surface temperatures were ~2-3°C higher than today, to extensive Northern Hemisphere glaciation (NHG) at ~2.73 Ma. We show that North Pacific deep waters were significantly colder (4oC) and likely fresher than North Atlantic deep water prior to the intensification of NHG. At ~2.73 Ma, the Atlantic-Pacific temperature gradient was reduced to <1°C suggesting the initiation of stronger heat transfer from the North Atlantic to the deep Pacific. We posit that increased glaciation of Antarctica, deduced from the 21±10 m sea-level fall from 3.15-2.75 Ma, and the development of a strong polar halocline, fundamentally altered deep ocean circulation, which enhanced inter-hemispheric heat and salt transport thereby contributing to the NHG. STUDY NOTES: All data was generated using benthic foraminifera Uvigerina sp. Records are not necessarily continuous.

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