A refined TALDICE-1a age scale from 55 to 112 ka before present for the Talos Dome ice core based on high-resolution methane measurements

noaa-icecore-16492 TALDICE Ice Core 55-112 KYrBP Methane and Calcium Data Schüpbach, S.; Federer, U.; Bigler, M.; Fischer, H.; Stocker, T.F. TALDICE Ice Core 55-112 KYrBP Methane and Calcium Data 2014-05-27 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16492 Investigator S. Schüpbach Investigator U. Federer Investigator M. Bigler Investigator H. Fischer Investigator T.F. Stocker earth science paleoclimate ice cores calcium,bulk ice,null,parts per billion,null,ice cores,null,continuous flow analysis,N,null earth science paleoclimate ice cores ice age,null,null,calendar year before present,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 climate forcing|ice cores methane,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,null,continuous flow analysis|gas chromatography|wet extraction,N,null earth science paleoclimate ice cores gas age,null,null,calendar year before present,null,ice cores,null,null,N,null earth science paleoclimate ice core chemistry earth science paleoclimate ice core atmospheric gas geoscientificInformation 110522 cal yr BP 53612 cal yr BP Complete -72.8166 -72.8166 159.1833 159.1833 2315 2315 Continent Antarctica Talos Dome TALDICE>LATITUDE -72.8166>LONGITUDE 159.1833 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII S. Schüpbach, U. Federer, M. Bigler, H. Fischer, and T.F. Stocker 2011 A refined TALDICE-1a age scale from 55 to 112 ka before present for the Talos Dome ice core based on high-resolution methane measurements Climate of the Past 7 3 1001-1009 10.5194/cp-7-1001-2011 www.clim-past.net/7/1001/2011/

A precise synchronization of different climate records is indispensable for a correct dynamical interpretation of paleoclimatic data. A chronology for the TALDICE ice core from the Ross Sea sector of East Antarctica has recently been presented based on methane synchronization with Greenland and the EDC ice cores and d18Oice synchronization with EDC in the bottom part (TALDICE-1). Using new high-resolution methane data obtained with a continuous flow analysis technique, we present a refined age scale for the age interval from 55-112 thousand years (ka) before present, where TALDICE is synchronized with EDC. New and more precise tie points reduce the uncertainties of the age scale from up to 1900 yr in TALDICE-1 to below 1100 yr over most of the refined interval and shift the Talos Dome dating to significantly younger ages during the onset of Marine Isotope Stage 3. Thus, discussions of climate dynamics at sub-millennial time scales are now possible back to 110 ka, in particular during the inception of the last ice age. Calcium data of EDC and TALDICE are compared to show the impact of the refinement to the synchronization of the two ice cores not only for the gas but also for the ice age scale. STUDY NOTES: High-resolution methane and calcium data from the TALDICE ice core, used in development of the TALDICE 1a timescale, synchronized to the EPICA Dome C ice core.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2011ch4.txt Data File; TALDICE Ice Core Methane Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2011ca.txt Data File; TALDICE Ice Core Calcium Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11