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The Last Interglacial Ocean

Abstract

The final effort of the CLIMAP project was a study of the last interglaciation, a time of minimum ice volume some 122,000 yr ago coincident with the Substage 5e oxygen isotopic minimum. Based on detailed oxygen isotope analyses and biotic census counts in 52 cores across the world ocean, last interglacial sea-surface temperatures (SST) were compared with those today. There are small SST departures in the mid-latitude North Atlantic (warmer) and the Gulf of Mexico (cooler). The eastern boundary currents of the South Atlantic and Pacific oceans are marked by large SST anomalies in individual cores, but their interpretations are precluded by no-analog problems and by discordancies among estimates from different biotic groups. In general, the last interglacial ocean was not significantly different from the modern ocean. The relative sequencing of ice decay versus oceanic warming on the Stage 6/5 oxygen isotopic transition and of ice growth versus oceanic cooling on the Stage 5e/5d transition was also studied. In most of the Southern Hemisphere, the oceanic response marked by the biotic census counts preceded (led) the global ice-volume response marked by the oxygen-isotope signal by several thousand years. The reverse pattern is evident in the North Atlantic Ocean and the Gulf of Mexico, where the oceanic response lagged that of global ice volume by several thousand years. As a result, the very warm temperatures associated with the last interglaciation were regionally diachronous by several thousand years. These regional lead-lag relationships agree with those observed on other transitions and in long-term phase relationships; they cannot be explained simply as artifacts of bioturbational translations of the original signals.

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A.W.H. , J.E.Damuth , L.Lott , R.Free (1976). Late Quaternary climatic record in western equatorial Atlantic sediment R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 165200

W.S.Broecker (1981). Glacial to interglacial changes in ocean and atmosphere chemistry A.Berger , Climatic Variations and Variability: Facts and Theories Reidel Dordrecht/Boston 111121

J.L.Fastook (1984). West Antarctica, the sea-level controlled marine instability: Past and future J.Hansen , T.Takahashi , Climate Sensitivity: Sensitivity to Solar Irradiance and CO2 . Maurice Ewing Symposium Series. Vol. 4, American Geophysical Union Washington, D.C

J.V.Gardner , J.D.Hays (1976). Responses of sea-surface temperature and circulation to global climatic change during the past 200,000 years in the eastern equatorial Atlantic Ocean R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 221246

T.B.Kellogg (1976). Late Quaternary climatic changes: Evidence from deep-sea cores of Norwegian and Greenland seas R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 77110

N.G.Kipp (1976). New transfer function for estimating past sea-surface conditions from sea bed distribution of planktonic foraminiferal assemblages in the North Atlantic R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 342

A.McIntyre , N.G.Kipp , A.W.H. , T.Crowley , T.B.Kellogg , J.V.Gardner , W.Prell , W.F.Ruddiman (1976). Glacial North Atlantic 18,000 years ago: A CLIMAP reconstruction R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 4376

T.C.Moore , N.G.Pisias , G.R.Heath (1977). Climatic changes and lags in Pacific carbonate preservation, SST and global ice volume N.R.Andersen , A.Malahoff , The Fate of Fossil Fuel CO2 in the Oceans Plenum New York 145165

T.-H.Peng , W.S.Broecker , G.Kipphut , N.J.Shackleton (1977). Benthic mixing in deep-sea cores as determined by 14C dating and its implications regarding climate stratigraphy and the fate of fossil fuel CO2 N.R.Anderson , A.Malahoff , The Fate of Fossil Fuel CO2 in the Oceans Plenum New York 355373

W.L.Prell , J.D.Hays (1976). Pleistocene faunal and temperature patterns, Colombia Basin R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 201220

W.F.Ruddiman , A.McIntyre (1976). Northeast Atlantic paleoclimatic changes over the past 600,000 years R.M.Cline , J.D.Hays , Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America, Memoir 145. 111146

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Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
  • URL: /core/journals/quaternary-research
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