noaa-icecore-2412 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2025-01-04 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Dome C, Newall Glacier - 14C Concentration Data 1994-07-01 publication doi:10.25921/b6cb-jw20 noaa-icecore-2412 NCEI DSI 1200_02 NCEI DSI 1200_01 Jull, A.J.T. originator Jull, A.J.T. author Lal, D. originator Lal, D. author Donahue, D.J. originator Donahue, D.J. author Mayewski, P.A. originator Mayewski, P.A. author Lorius, C. originator Lorius, C. author Raynaud, D. originator Raynaud, D. author Petit, J.-R. originator Petit, J.-R. 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 39450 to -50 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 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncei.noaa.gov/pub/data/paleo/webimages/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 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > climate forcing|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 > climate forcing|ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice core > atmospheric gas earth science > paleoclimate > ice core > carbon isotopes theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian What: carbon monoxide; Material: bulk ice What: carbon monoxide; Material: bulk ice What: carbon dioxide; Material: bulk ice What: sample identification; Material: null What: carbon dioxide; Material: bulk ice What: 14C; Material: bulk atmosphere What: 14C; Material: carbon dioxide What: 14C; Material: carbon monoxide What: 14C; Material: carbon monoxide What: 14C; Material: bulk atmosphere What: air content; Material: bulk ice What: 14C; Material: carbon dioxide What: 14C; Material: bulk atmosphere What: carbon dioxide; Material: bulk ice What: depth; Material: null What: weight; Material: bulk ice What: carbon monoxide; Material: bulk ice theme Paleoenvironmental Standard Terms (PaST) Thesaurus NOAA National Centers for Environmental Information https://www.ncei.noaa.gov/products/paleoclimatology/paleoenvironmental-standard-terms-thesaurus PaST Thesaurus information publisher Continent > Antarctica > Newall Glacier > LATITUDE -77.58 > LONGITUDE 162.5 Continent > Antarctica > Dome C > LATITUDE -74.65 > LONGITUDE 124.17 place DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions Cite as: Jull, A.J.T.; Lal, D.; Donahue, D.J.; Mayewski, P.A.; Lorius, C.; Raynaud, D.; Petit, J.-R. (1994-07-01): NOAA/WDS Paleoclimatology - Dome C, Newall Glacier - 14C Concentration Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/b6cb-jw20. 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. Measurements of cosmic-ray-produced 14C in firn and ice from Antarctica 1994 publication Jull, A.J.T., D. Lal, D.J. Donahue, P.A. Mayewski, C. Lorius, D. Raynaud, and J. Petit author Nuclear Instruments and Methods in Physics Research B publisher https://doi.org/10.1016/0168-583X(94)96028-3 HTTPS Web Browser Associated Reference published 1994 Jull, A.J.T., D. Lal, D.J. Donahue, P.A. Mayewski, C. Lorius, D. Raynaud, and J. Petit, 1994: Measurements of cosmic-ray-produced 14C in firn and ice from Antarctica. Nuclear Instruments and Methods in Physics Research B, 92, 326-330, 10.1016/0168-583X(94)96028-3 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 39450 cal yr BP to -50 cal yr BP; 124.17 162.5 -77.58 -74.65 -37500 2000 ABSTRACT SUPPLIED BY ORIGINATOR: We have studied the levels of 14C in firn and ice from two regions accumulating ice in Antarctica, Dome C, and Newall Glacier. The observed concentrations indicate variable amounts of in-situ 14C from cosmic-ray spallation of oxygen. 14C appears to be produced as both CO and CO2 in variable amounts, but our results suggest rapid conversion of 14CO to 14CO2. Much of the in-situ 14C is retained which results in a significant modification of the 14C/12C in ice derived from trapping of air at and below the firn-ice transition zone. This means that direct dating of accumulating ice cannot be used without correction for the in-situ 14C. In Newall ice, we see some evidence for an enhancement in in-situ 14C at or near the time of the Maunder Minimum. Results for Dome C firn and ice indicate higher levels of in-situ 14C in older ice. This is due either to a reduced accumulation rate in the past, or possible variations in cosmogenic 14C production. The levels of in-situ 14C in firn and ice, and its impact on 14C dates on trapped CO2 in ice are discussed. NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Native Format(s) https://doi.org/10.25921/b6cb-jw20 HTTPS Landing Page Metadata Landing Page NCEI landing page with general information and links to access the data. information https://www.ncei.noaa.gov/access/paleo-search/study/2412 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/ice-core HTTPS Information NCEI Ice Core Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/newall/newall_domec_14c.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21