{"NOAAStudyId":"24530","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2018-11-28","dataPublisher":"NOAA","dataType":"ICE CORES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-icecore-24530.xml","doi":null,"earliestYearBP":67750,"earliestYearCE":-65800,"entryId":"noaa-icecore-24530","funding":[],"investigators":"Buizert, C.; Sigl, M.; Severi, M.; Markle, B.R.; Wettstein, J.J.; McConnell, J.R.; Pedro, J.B.; Sodemann, H.; Goto-Azuma, K.; Kawamura, K.; Fujita, S.; Motoyama, H.; Hirabayashi, M.; Uemura, R.; Stenni, B.; Parrenin, F.; He, F.; Fudge, T.J.; Steig, E.J.","mostRecentYearBP":6024,"mostRecentYearCE":-4074,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/24530","originalSource":null,"publication":[{"abstract":"The mid-latitude westerly winds of the Southern Hemisphere play a central role in the global climate system via Southern Ocean upwelling, carbon exchange with the deep ocean, Agulhas leakage (transport of Indian Ocean waters into the Atlantic) and possibly Antarctic ice-sheet stability. Meridional shifts of the Southern Hemisphere westerly winds have been hypothesized to occur in parallel with the well-documented shifts of the intertropical convergence zone in response to Dansgaard-Oeschger (DO) events- abrupt North Atlantic climate change events of the last ice age. Shifting moisture pathways to West Antarctica are consistent with this view but may represent a Pacific teleconnection pattern forced from the tropics. The full response of the Southern Hemisphere atmospheric circulation to the DO cycle and its impact on Antarctic temperature remain unclear. Here we use five ice cores synchronized via volcanic markers to show that the Antarctic temperature response to the DO cycle can be understood as the superposition of two modes: a spatially homogeneous oceanic 'bipolar seesaw' mode that lags behind Northern Hemisphere climate by about 200 years, and a spatially heterogeneous atmospheric mode that is synchronous with abrupt events in the Northern Hemisphere. Temperature anomalies of the atmospheric mode are similar to those associated with present-day Southern Annular Mode variability, rather than the Pacific-South American pattern. Moreover, deuterium-excess records suggest a zonally coherent migration of the Southern Hemisphere westerly winds over all ocean basins in phase with Northern Hemisphere climate. Our work provides a simple conceptual framework for understanding circum-Antarctic temperature variations forced by abrupt Northern Hemisphere climate change. We provide observational evidence of abrupt shifts in the Southern Hemisphere westerly winds, which have previously documented ramifications for global ocean circulation and atmospheric carbon dioxide. These coupled changes highlight the necessity of a global, rather than a purely North Atlantic, perspective on the DO cycle.","author":{"name":"Christo Buizert, Michael Sigl, Mirko Severi, Bradley R. Markle, Justin J. Wettstein, Joseph R. McConnell, Joel B. Pedro, Harald Sodemann, Kumiko Goto-Azuma, Kenji Kawamura, Shuji Fujita, Hideaki Motoyama, Motohiro Hirabayashi, Ryu Uemura, Barbara Stenni, Frédéric Parrenin, Feng He, T. J. Fudge, Eric J. Steig"},"citation":"Christo Buizert, Michael Sigl, Mirko Severi, Bradley R. Markle, Justin J. Wettstein, Joseph R. McConnell, Joel B. Pedro, Harald Sodemann, Kumiko Goto-Azuma, Kenji Kawamura, Shuji Fujita, Hideaki Motoyama, Motohiro Hirabayashi, Ryu Uemura, Barbara Stenni, Frédéric Parrenin, Feng He, T. J. Fudge, Eric J. Steig. 2018. Abrupt Ice Age Shifts in Southern Westerlies and Antarctic Climate Forced from the North. Nature, 563, 681-685. doi: 10.1038/s41586-018-0727-5","edition":null,"identifier":{"id":"10.1038/s41586-018-0727-5","type":"doi","url":"http://dx.doi.org/10.1038/s41586-018-0727-5"},"issue":null,"journal":"Nature","pages":"681-685","pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Abrupt Ice Age Shifts in Southern Westerlies and Antarctic Climate Forced from the North","type":"publication","volume":"563"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57382","geo":{"geoType":"Feature","geometry":{"coordinates":["-79.463","-112.125"],"type":"POINT"},"properties":{"easternmostLongitude":"-112.125","maxElevationMeters":"1766","minElevationMeters":"1766","northernmostLatitude":"-79.463","southernmostLatitude":"-79.463","westernmostLongitude":"-112.125"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"37633","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2018nsss.txt","linkText":"WAIS Divide nssS Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"WAIS2018nssS","dataTableNotes":null,"earliestYear":67750,"earliestYearBP":67750,"earliestYearCE":-65800,"mostRecentYear":6024,"mostRecentYearBP":6024,"mostRecentYearCE":-4074,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"37634","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2018tp-edc.txt","linkText":"EDC Volcanic Tie Points","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"WAIS2018tp-edc","dataTableNotes":null,"earliestYear":57324,"earliestYearBP":57324,"earliestYearCE":-55374,"mostRecentYear":10017,"mostRecentYearBP":10017,"mostRecentYearCE":-8067,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"37635","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2018tp-edml.txt","linkText":"EDML Volcanic Tie Points","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"WAIS2018tp-edml","dataTableNotes":null,"earliestYear":61247,"earliestYearBP":61247,"earliestYearCE":-59297,"mostRecentYear":10011,"mostRecentYearBP":10011,"mostRecentYearCE":-8061,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"37636","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2018tp-tal.txt","linkText":"TALDICE Volcanic Tie Points","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"WAIS2018tp-tal","dataTableNotes":null,"earliestYear":61623,"earliestYearBP":61623,"earliestYearCE":-59673,"mostRecentYear":10018,"mostRecentYearBP":10018,"mostRecentYearCE":-8068,"species":[],"timeUnit":"cal yr BP"}],"siteName":"WAIS Divide"}],"studyCode":null,"studyName":"WAIS Divide 67-6ka nssS Data and EDML, EDC and TALDICE Volcanic Tie Points","studyNotes":"Non-sea salt Sulfate (nssS) data for the WAIS Divide ice core, plus volcanic tie points to Antarctic ice cores EPICA Dronning Maud Land, EPICA Dome C, and Talos Dome.","version":"1.0","xmlId":"22694"}