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. Woodard, S.C. Rosenthal, Y. Miller, K.G. Wright, J.D. Chiu, B.K. Lawrence, K.T. 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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (DSDP 607>LATITUDE 41.000019>LONGITUDE -32.950122) (CHN82-63>LATITUDE 43>LONGITUDE -31) (ODP 1208>LATITUDE 36.127>LONGITUDE 158.2016) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Woodard, S.C. Investigator : Rosenthal, Y. Investigator : Miller, K.G. Investigator : Wright, J.D. Investigator : Chiu, B.K. Investigator : Lawrence, K.T. 2014-10-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17351 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-hol-lgm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-chn82-63.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-si.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-tm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-hol-lgm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-chn82-63.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-si.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-tm.txt English https://www.ncdc.noaa.gov/paleo/study/17351 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-hol-lgm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-chn82-63.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-si.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/woodard2014/woodard2014-1208-tm.txt Woodard, S.C., Y. Rosenthal, K.G. Miller, J.D. Wright, B.K. Chiu, and K.T. Lawrence2014Antarctic Role in Northern Hemisphere GlaciationScience10.1126/science.1255586 START YEAR: 33778 cal yr BP * END YEAR: 2400 cal yr BP -32.950122 36.127 158.2016 43