noaa-icecore-9959 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 2024-05-10 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Law Dome Ice Core 2000-Year CO2, CH4, and N2O Data 2010-07-16 publication doi:10.25921/g6kd-k189 noaa-icecore-9959 NCEI DSI 1200_02 NCEI DSI 1200_01 MacFarling Meure, C. originator MacFarling Meure, C. author Etheridge, D.M. originator Etheridge, D.M. author Trudinger, C. originator Trudinger, C. author Steele, L.P. originator Steele, L.P. author Langenfelds, R.L. originator Langenfelds, R.L. author van Ommen, T.D. originator van Ommen, T.D. author Smith, A.M. originator Smith, A.M. author Elkins, J. originator Elkins, J. 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 climate forcing|ice cores with a geographic location of Antarctica. The time period coverage is from 1949 to -56 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 > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > climate forcing|ice cores earth science > paleoclimate > ice core > atmospheric gas 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 carbon cycle theme What: sample identification; Material: null What: nitrous oxide; Material: bulk atmosphere What: methane; Material: bulk atmosphere What: carbon dioxide; Material: bulk atmosphere What: notes; Material: null What: gas age; Material: null What: methane; Material: bulk atmosphere What: carbon dioxide; Material: bulk atmosphere What: methane; Material: bulk atmosphere What: carbon dioxide; Material: bulk atmosphere What: methane; Material: bulk atmosphere What: methane; Material: bulk atmosphere What: nitrous oxide; Material: bulk atmosphere What: nitrous oxide; Material: bulk atmosphere 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 > Law Dome > LATITUDE -66.73 > LONGITUDE 112.83 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: MacFarling Meure, C.; Etheridge, D.M.; Trudinger, C.; Steele, L.P.; Langenfelds, R.L.; van Ommen, T.D.; Smith, A.M.; Elkins, J. (2010-07-16): NOAA/WDS Paleoclimatology - Law Dome Ice Core 2000-Year CO2, CH4, and N2O Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/g6kd-k189. 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. Law Dome CO2, CH4 and N2O Ice Core Records Extended to 2000 years BP 2006 publication MacFarling Meure, C., D. Etheridge, C. Trudinger, P. Steele, R. Langenfelds, T. van Ommen, A. Smith, and J. Elkins author Geophysical Research Letters publisher https://doi.org/10.1029/2006GL026152 HTTPS Web Browser Associated Reference published 2006 MacFarling Meure, C., D. Etheridge, C. Trudinger, P. Steele, R. Langenfelds, T. van Ommen, A. Smith, and J. Elkins, 2006: Law Dome CO2, CH4 and N2O Ice Core Records Extended to 2000 years BP. Geophysical Research Letters, 33, 4115-4128, 10.1029/2006GL026152 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 1 CE to 2006 CE; Date Range: 1949 cal yr BP to -56 cal yr BP; 112.83 112.83 -66.73 -66.73 Study Coordinates -66.73 112.83 1 2006 STUDY NOTES: Law Dome ice core (DSS, DE08 and DE08-2), firn air (DSSW20K), and Cape Grim instrumental (deseasonalised archive, insitu and flask) records of CO2, CH4 and N2O concentrations for the past 2000 years. The dome summit is as follows, individual cores are within about 25 km (see publications): 66°44'S, 112°50'E, 1390m elevation. Measurement precision for the ice core air samples is 4.1 ppb CH4, 1.1 ppm CO2, and 6.5 ppb N2O. Measurement precision for the firn air samples is 2 ppb CH4, 0.1 ppm CO2 and 0.3 ppb N2O. Ice core concentrations are adjusted for small system enhancements (1.1 ± 0.8 ppm for CO2, 4.1 ± 4.0 ppb for CH4, and 1.8 ± 0.9 ppb for N2O) as described in MacFarling Meure et al. (2006) and for the effects of gravitational fractionation, also small, as described in Etheridge et al. 1996, 1998. Air age spread is 10-12 years for DE08/-2 ice samples, 18-20 years for DSS ice samples and 5 years for DSSW20K firn air samples. See Trudinger et al., 2002 for statistical definitions. DE08 and DE08-2 ice core air dating uncertainty is less than +/- 3 years. DSS ice core air dating uncertainty is less than +/- 5 years. DSS ice dating has been revised based on new accumulation rates and temperatures (van Ommen, T., V. Morgan and M.A.J. Curran. 2004. Deglacial and Holocene changes in accumulation at Law Dome, East Antarctica, Annals Glaciol., 39, 359-365.; MacFarling Meure 2004). The dating of published DSS concentrations have been adjusted by less than 5 years under the new chronology. Original references: a) Ice Core results: Law Dome CO2 and CH4 records of the last 1000 years first published in Etheridge et al., 1996 and 1998. Newer results which fill in gaps, extend record to 2000 BP and include N2O, were published and explained in detail in MacFarling Meure et al. 2006 and MacFarling Meure 2004. Some new CH4 results were also published in Ferretti et al. 2005. b) Firn air results: From Etheridge et al. 1998, Trudinger et al. 2002, Sturrock et al. 2002. c) Cape Grim record: The Cape Grim record is composed of deseasonalised air archive and flask records for CH4 and N2O and deseasonalised flask and in situ records for CO2, from Langenfelds et al. 1996, 2004. ABSTRACT SUPPLIED BY ORIGINATOR: New measurements of atmospheric greenhouse gas concentrations in ice from Law Dome, Antarctica reproduce published Law Dome CO2 and CH4 records, extend them back to 2000 years BP, and include N2O. They have very high air age resolution, data density and measurement precision. Firn air measurements span the past 65 years and overlap with the ice core and direct atmospheric observations. Major increases in CO2, CH4 and N2O concentrations during the past 200 years followed a period of relative stability beforehand. Decadal variations during the industrial period include the stabilization of CO2 and slowing of CH4 and N2O growth in the 1940s and 1950s. Variations of up to 10 ppm CO2, 40 ppb CH4 and 10 ppb N2O occurred throughout the preindustrial period. Methane concentrations grew by 100 ppb from AD 0 to 1800, possibly due to early anthropogenic emissions. 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. 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Native Format(s) https://doi.org/10.25921/g6kd-k189 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/9959 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/law/law2006.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2006-noaa.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2006-n2o-noaa.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2006-co2-noaa.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2006-ch4-noaa.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