noaa-icecore-24371 North GRIP Ice Core Last Glacial d15N and Temperature Reconstruction Kindler, P.; Guillevic, M.; Baumgartner, M.; Schwander, J.; Landais, A.; Leuenberger, M. North GRIP Ice Core Last Glacial d15N and Temperature Reconstruction 2018-06-08 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/24371 Investigator P. Kindler Investigator M. Guillevic Investigator M. Baumgartner Investigator J. Schwander Investigator A. Landais Investigator M. Leuenberger earth science paleoclimate climate reconstructions|ice cores temperature,delta 15N excess,null,degree Celsius,null,climate reconstructions|ice cores,null,null,N,null earth science paleoclimate ice cores gas age,null,null,calendar year before present,null,ice cores,null,null,N,GICC05 gas age; calendar years before 2k earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,tuned earth science paleoclimate ice cores age,null,null,calendar year before present,null,ice cores,null,null,N,calendar years before 2k earth science paleoclimate climate reconstructions|ice cores age,null,null,calendar year before present,null,climate reconstructions|ice cores,null,null,N,calendar years before 2k; ss09sea06bm earth science paleoclimate ice cores ice age,null,null,calendar year before present,null,ice cores,null,null,N,GICC05 ice age; calendar years before 2k earth science paleoclimate ice cores depth,null,null,meter,null,ice cores,null,null,N,null earth science paleoclimate ice cores ice age,null,null,calendar year before present,null,ice cores,null,null,N,ss09sea06bm ice age; calendar years before 2k earth science paleoclimate climate reconstructions|ice cores depth,null,null,meter,null,climate reconstructions|ice cores,null,null,N,null earth science paleoclimate ice cores delta 15N,bulk atmosphere,null,per mil AIR,null,ice cores,null,isotope ratio mass spectrometry,N,null earth science paleoclimate ice cores gas age,null,null,calendar year before present,null,ice cores,null,null,N,ss09sea06bm gas age; calendar years before 2k earth science paleoclimate climate reconstructions|ice cores age,null,null,calendar year before present,null,climate reconstructions|ice cores,null,null,N,calendar years before 2k; GICC05 earth science paleoclimate ice cores delta 15N,bulk atmosphere,unspecified margin of error,per mil AIR,null,ice cores,null,isotope ratio mass spectrometry,N,null earth science paleoclimate ice core nitrogen isotopes earth science paleoclimate ice core age control earth science paleoclimate ice core reconstruction geoscientificInformation 123001 cal yr BP 9700 cal yr BP Complete 75.1 75.1 -42.33 -42.33 2917 2917 Continent North America Greenland NGRIP>LATITUDE 75.1>LONGITUDE -42.33 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 P. Kindler, M. Guillevic, M. Baumgartner, J. Schwander, A. Landais, M. Leuenberger 2014 Climate of the Past 10 887-902 10.5194/cp-10-887-2014 https://www.clim-past.net/10/887/2014/

In order to reconstruct the temperature of the North Greenland Ice Core Project (NGRIP) site, new measurements of d15N have been performed covering the time period from the beginning of the Holocene to Dansgaard-Oeschger (DO) event 8. Together with previously measured and mostly published d15N data, we present for the first time a NGRIP temperature reconstruction for the whole last glacial period from 10 to 120 kyr b2k (thousand years before 2000 AD) including every DO event based on d15N isotope measurements combined with a firn densification and heat diffusion model. The detected temperature rises at the onset of DO events range from 5 C (DO 25) up to 16.5 C (DO 11) with an uncertainty of +/- 3 C. To bring measured and modelled data into agreement, we had to reduce the accumulation rate given by the NGRIP ss09sea06bm timescale in some periods by 30 to 35%, especially during the last glacial maximum. A comparison between reconstructed temperature and d18Oice data confirms that the isotopic composition of the stadial was strongly influenced by seasonality. We evidence an anticorrelation between the variations of the d18Oice sensitivity to temperature (referred to as alpha) and obliquity in agreement with a simple Rayleigh distillation model. Finally, we suggest that alpha might be influenced by the Northern Hemisphere ice sheet volume. STUDY NOTES: North GRIP Ice Core Last Glacial (120-10 KYrBP) nitrogen isotope (d15N) data and temperature reconstruction

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2014age.txt NOAA Template File; North GRIP Ice Core Age Models GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2014d15n.txt NOAA Template File; North GRIP Ice Core Last Glacial d15N Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2014temp.txt NOAA Template File; North GRIP Ice Core Last Glacial Temperature Reconstruction USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11