Law Dome Ice Core Deglacial Methane and Oxygen Isotope Data Morgan, V.I.; Delmotte, M.; van Ommen, T.D.; Jouzel, J.; Chappellaz, J.A.; Woon, S.; Masson-Delmotte, V.; Raynaud, D. Morgan, V.I. Delmotte, M. van Ommen, T.D. Jouzel, J. Chappellaz, J.A. Woon, S. Masson-Delmotte, V. Raynaud, D. Meridional Overturning Circulation (MOC) earth science/paleoclimate/ice cores (depth at sample start,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth at sample end,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (gas age,null,range lower bound,calendar year before present,null,ice cores,null,null,N,alternate chronology using smallest likely delta age) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk atmosphere,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (methane,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Law Dome>LATITUDE -66.73>LONGITUDE 112.83) The last deglaciation was marked by large, hemispheric, millennial-scale climate variations: the Bølling-Allerød and Younger Dryas periods in the north, and the Antarctic Cold Reversal in the south. A chronology from the high-accumulation Law Dome East Antarctic ice core constrains the relative timing of these two events and provides strong evidence that the cooling at the start of the Antarctic Cold Reversal did not follow the abrupt warming during the northern Bølling transition around 14,500 years ago. This result suggests that southern changes are not a direct response to abrupt changes in North Atlantic thermohaline circulation, as is assumed in the conventional picture of a hemispheric temperature seesaw. STUDY NOTES: Oxygen isotope data of air and ice plus air methane concentration for the last deglacial period, from the Law Dome ice core, Antarctica. These data are also available in the supplementary materials for Morgan et al. Science 297:1862, at: http://www.sciencemag.org/content/suppl/2002/09/12/297.5588.1862.DC1.html These data are also archived by the Australian Antarctic Division's Catalogue of Australian Antarctic and Subantarctic Metatdata (CAASM), at: http://gcmd.nasa.gov/KeywordSearch/Metadata.do?Portal=amd_au&KeywordPath=Parameters%7C%28%5BFreetext%3D%27law+dome%27%5D%29&OrigMetadataNode=AADC&EntryId=air_methane_lawdome&MetadataView=Full&MetadataType=0&lbnode=mdlb3 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Morgan, V.I. Investigator : Delmotte, M. Investigator : van Ommen, T.D. Investigator : Jouzel, J. Investigator : Chappellaz, J.A. Investigator : Woon, S. Investigator : Masson-Delmotte, V. Investigator : Raynaud, D. 2011-04-26 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11129 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.txt English https://www.ncdc.noaa.gov/paleo/study/11129 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2002.txt Morgan, V., M. Delmotte, T. van Ommen, J. Jouzel, J. Chappellaz, S. Woon, V. Masson-Delmotte, and D. Raynaud. 2002. Relative Timing of Deglacial Climate Events in Antarctica and Greenland. Science, Vol. 297, pp.1862-1864. DOI: 10.1126/science.1074257 START YEAR: 19000 cal yr BP * END YEAR: 9000 cal yr BP 112.83 -66.73 112.83 -66.73