Global 1Ma Temperature, Sea Level, and Ice Volume Reconstructions Bintanja, R.; van de Wal, R.S.W.; Oerlemans, J.H. Bintanja, R. van de Wal, R.S.W. Oerlemans, J.H. Air Temperature Reconstruction Sea Level Reconstruction sea level earth science/paleoclimate/paleoclimatic modeling (age,null,null,calendar kiloyear before present,null,paleoclimatic modeling,null,null,N,null) earth science/paleoclimate/paleoclimatic modeling (ice sheet volume,null,null,meter,null,paleoclimatic modeling,null,null,N,Eurasian ice sheet volume in meters of sea level equivalent; anomalized relative to present) earth science/paleoclimate/paleoclimatic modeling (ice sheet volume,null,null,meter,null,paleoclimatic modeling,null,null,N,North American ice sheet volume in meters of sea level equivalent; anomalized relative to present) earth science/paleoclimate/paleoclimatic modeling (delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,Marine oxygen isotope value relative to present) earth science/paleoclimate/paleoclimatic modeling (delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,"Deep-sea temperature contribution to the marine isotope signal, relative to present") earth science/paleoclimate/paleoclimatic modeling (delta 18O,bulk ice,null,per mil,null,paleoclimatic modeling,null,null,N,Mean isotope value of the Eurasian ice sheets) earth science/paleoclimate/paleoclimatic modeling (delta 18O,bulk ice,null,per mil,null,paleoclimatic modeling,null,null,N,Mean isotope value of the North American ice sheets) earth science/paleoclimate/paleoclimatic modeling (sea level,null,null,meter,null,paleoclimatic modeling,anomalized,null,N,anomalized relative to present) earth science/paleoclimate/paleoclimatic modeling (surface air temperature,null,null,degree Celsius,null,paleoclimatic modeling,anomalized,null,N,anomalized relative to present) earth science/paleoclimate/paleoclimatic modeling (delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,"Ice sheet contribution to the marine isotope signal, relative to present") earth science/paleoclimate/reconstructions earth science/paleoclimate/reconstructions earth science/paleoclimate/reconstructions (Global>LATITUDE >LONGITUDE ) Marine records of sediment oxygen isotope compositions show that the Earth's climate has gone through a succession of glacialand interglacial periods during the past million years. But the interpretation of the oxygen isotope records is complicated because both isotope storage in ice sheets and deep-water temperature affect the recorded isotopic composition. Separating these two effects would require long records of either sea level or deep-ocean temperature, which are currently not available. Here we use a coupled model of the Northern Hemisphere ice sheets and ocean temperatures, forced to match an oxygen isotope record for the past million years compiled from 57 globally distributed sediment cores, to quantify both contributions simultaneously. We find that the ice-sheet contribution to the variability in oxygen isotope composition varied from ten per cent in the beginning of glacial periods to sixty per cent at glacial maxima, suggesting that strong ocean cooling preceded slow ice-sheet build-up. The model yields mutually consistent time series of continental mean surface temperatures between 40 and 808 N, ice volume and global sea level. We find that during extreme glacial stages, air temperatures were 17 +/- 1.8C lower than present, with a 120 +/- 10m sea level equivalent of continental ice present. STUDY NOTES: Modelled reconstructions of surface air temperature, ice volume, and sea level derived from marine benthic oxygen isotopes (LR04 stack) for the past one million years. The reconstructed atmospheric surface air temperatures apply to all subarctic to arctic land masses (including continental shelves) north of about ~45N. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bintanja, R. Investigator : van de Wal, R.S.W. Investigator : Oerlemans, J.H. 2011-09-12 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11932 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.xls English https://www.ncdc.noaa.gov/paleo/study/11932 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2005/bintanja2005.xls Bintanja, R., R.S.W. van de Wal, and J. Oerlemans. 2005. Modelled atmospheric temperatures and global sea levels over the past million years. Nature, Vol. 437, pp. 125-128, 1 September 2005. doi:10.1038/nature03975 START YEAR: 1000000 cal yr BP * END YEAR: 0 cal yr BP -180 -90 180 90