noaa-icecore-14651 eng; USA utf8 dataset Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2018-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Antarctic Ice Cores 160KYr Methane Isotope Data 2013-06-17 publication noaa-icecore-14651 NCEI DSI 1200_01 Möller, L. originator Möller, L. author Sowers, T. originator Sowers, T. author Bock, M. originator Bock, M. author Spahni, R. originator Spahni, R. author Behrens, M. originator Behrens, M. author Schmitt, J. originator Schmitt, J. author Miller, H. originator Miller, H. author Fischer, H. originator Fischer, H. author NOAA National Centers for Environmental Information publisher tableDigital This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Ice Core. The data include parameters of ice cores with a geographic location of Antarctica. The time period coverage is from 164013 to 9937 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. completed Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncdc.noaa.gov/c/images/pc-default-icecore.png Paleoclimatology - Ice Core PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Ice Core Records Earth Science > Paleoclimate > Ice Core Records theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice core > carbon isotopes earth science > paleoclimate > ice core > hydrogen isotopes theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher carbon cycle theme Continent > Antarctica> Vostok > LATITUDE -78.47 > LONGITUDE 106.8 Continent > Antarctica> EPICA Dronning Maud Land > LATITUDE -75 > LONGITUDE .07 place otherRestrictions Cite as: Möller, L.; Sowers, T.; Bock, M.; Spahni, R.; Behrens, M.; Schmitt, J.; Miller, H.; Fischer, H. (2013-06-17): NOAA/WDS Paleoclimatology - Antarctic Ice Cores 160KYr Methane Isotope Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/14651. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. otherRestrictions None otherRestrictions 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. Independent variations of CH4 emissions and isotopic composition over the past 160,000 years 2013 publication Lars Möller, Todd Sowers, Michael Bock, Renato Spahni, Melanie Behrens, Jochen Schmitt, Heinrich Miller, and Hubertus Fischer author Nature Geoscience publisher https://doi.org/10.1038/ngeo1922 HTTPS Web Browser Associated Reference published 2013 Lars Möller, Todd Sowers, Michael Bock, Renato Spahni, Melanie Behrens, Jochen Schmitt, Heinrich Miller, and Hubertus Fischer, 2013: Independent variations of CH4 emissions and isotopic composition over the past 160,000 years. Nature Geoscience, 6, 885-890, 10.1038/ngeo1922 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 164013 cal yr BP to 9937 cal yr BP; .07 106.8 -78.47 -75 -162063 -7987 STUDY NOTES: We reconstructed atmospheric d13CH4 records using wet extraction techniques and continuous flow gas chromatography combustion isotope ratio mass spectrometry (GC/C/IRMS) measurements performed on ice core material from both the European Project for Ice Coring in Antarctica (EPICA) core from Dronning Maud Land (EDML) and the Vostok cores. At the Alfred Wegener Institute (AWI) we analyzed 151 samples from the EDML core (including 32 replicates, reproducibility of 0.2 , 1s) to construct a high resolution record between 20 kyr and 75 kyr BP (1.000 years before present, present referring to 1950 AD) with an average temporal resolution of better than one sample every 500 years. The period covering the two most pronounced climatic excursions in the Greenland temperature record during MIS 3 (DO events 7 and 8) were sampled with a resolution of ~200 years. A complementary record of 79 samples of Vostok ice core material was measured at the Pennsylvania State University (PSU) covering a time period from 50 kyr to 160 kyr BP with an analytical uncertainty of 0.3 (1s), equivalent to an average temporal resolution of 1660 years. The two records were corrected for an instrumental interference from atmospheric krypton, for gravitational settling in the firn, and a minor inter-laboratory offset of 0.14 . All d13C values are reported versus Vienna PeeDee Belemnite (VPDB). We further analyzed 20 samples of EDML ice for dD(CH4) with an external precision of about 2.5 (1s). The measurements were performed at the University of Bern using a purge and trap extraction coupled to a gas chromatography pyrolysis isotope ratio mass spectrometer (GC/P/IRMS) and cover the MIS 5/4 transition with an average resolution of 1.5 kyr in between 54 and 85 kyr BP. The dD(CH4) values are reported with respect to the international Vienna Standard Mean Ocean Water (VSMOW) scale. ABSTRACT SUPPLIED BY ORIGINATOR: During the last glacial cycle, greenhouse gas concentrations fluctuated on decadal and longer timescales. Concentrations of methane, as measured in polar ice cores, show a close connection with Northern Hemisphere temperature variability, but the contribution of the various methane sources and sinks to changes in concentration is still a matter of debate. Here we assess changes in methane cycling over the past 160,000 years by measurements of the carbon isotopic composition d13C of methane in Antarctic ice cores from Dronning Maud Land and Vostok. We find that variations in the d13C of methane are not generally correlated with changes in atmospheric methane concentration, but instead more closely correlated to atmospheric CO2 concentrations. We interpret this to reflect a climatic and CO2-related control on the isotopic signature of methane source material, such as ecosystem shifts in the seasonally inundated tropical wetlands that produce methane. In contrast, relatively stable d13C values occurred during intervals of large changes in the atmospheric loading of methane. We suggest that most methane sources - most notably tropical wetlands - must have responded simultaneously to climate changes across these periods. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-icecore-14651 HTTPS Landing Page NCEI landing page for this dataset Dataset landing page with general information and links to access the data. information https://www.ncdc.noaa.gov/paleo/study/14651 HTTPS Web Browser NCEI Study Page Study page with dataset access information. search https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core HTTPS Information NCEI Ice Core Page General information for this data type. information https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/maud/edml2013ddch4.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/vostok2013d13ch4.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/maud/edml2013d13ch4.txt HTTP Download NCEI Direct Download Direct download links for dataset files. download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25