NOAA/WDS Paleoclimatology - GRIP Ice Core 248KYr Oxygen Isotope Data
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title: NOAA/WDS Paleoclimatology - GRIP Ice Core 248KYr Oxygen Isotope Data
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date: 1997-11-30
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Anchor: DOI doi:10.25921/m91s-k638
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code: noaa-icecore-17839
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code: NCEI DSI 1200_02
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individualName: Johnsen, S.J.
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individualName: Clausen, H.B.
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individualName: Dansgaard, W.
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abstract: 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 Greenland. The time period coverage is from 248763 to -39 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
purpose: 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.
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fileDescription: Paleoclimatology - Ice Core
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keyword: Earth Science > Climate Indicators > Paleoclimate Indicators > Ice Core Records
keyword: Earth Science > Paleoclimate > Ice Core Records
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date: 2020-01-09
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keyword: earth science > paleoclimate > ice cores
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keyword: earth science > paleoclimate > ice core > oxygen isotopes
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keyword: What: depth at sample end; Material: null
keyword: What: delta 18O; Material: bulk ice
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keyword: Continent > North America > Greenland > GRIP > LATITUDE 72.58 > LONGITUDE -37.63
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keyword: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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otherConstraints: Cite as: Johnsen, S.J.; Clausen, H.B.; Dansgaard, W.; Gundestrup, N.; Hammer, C.U.; Andersen, U.; Andersen, K.K.; Hvidberg, C.S.; Dahl-Jensen, D.; Steffensen, J.P.; Shoji, H.; Sveinbjörnsdóttir, A.E.; White, J.W.C.; Jouzel, J.; Fisher, D.A. (1997-11-30): NOAA/WDS Paleoclimatology - GRIP Ice Core 248KYr Oxygen Isotope Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/m91s-k638. Accessed [date].
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otherConstraints: 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.
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otherConstraints: 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.
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otherConstraints: 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.
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title: The d18O record along the Greenland Ice Core Project deep ice core and the problem of possible Eemian climatic instability
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date: 1997
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individualName: Sigfus J. Johnsen, Henrik B. Clausen, Willi Dansgaard, Niels S. Gundestrup, Claus U. Hammer, Uffe Andersen, Katrine K. Andersen, Christine S. Hvidberg, Dorthe Dahl‐Jensen, Jorgen P. Steffensen, Hitoshi Shoji, Arny E. Sveinbjornsdottir, Jim White, Jean Jouzel, David Fisher
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description: Sigfus J. Johnsen, Henrik B. Clausen, Willi Dansgaard, Niels S. Gundestrup, Claus U. Hammer, Uffe Andersen, Katrine K. Andersen, Christine S. Hvidberg, Dorthe Dahl‐Jensen, Jorgen P. Steffensen, Hitoshi Shoji, Arny E. Sveinbjornsdottir, Jim White, Jean Jouzel, David Fisher, 1997: The d18O record along the Greenland Ice Core Project deep ice core and the problem of possible Eemian climatic instability. Journal of Geophysical Research: Oceans, 102, 26397-26410, 10.1029/97JC00167
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description: Date Range: 248763 cal yr BP to -39 cal yr BP;
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westBoundLongitude: -37.63
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southBoundLatitude: 72.58
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beginPosition: -246813
endPosition: 1989
supplementalInformation: STUDY NOTES: This data set contains 55cm average delta 18-O values from the GRIP core. These data were used in the construction of the glaciological timescale. ABSTRACT SUPPLIED BY ORIGINATOR: Over 70,000 samples from the 3029-m-long Greenland Ice Core Project (GRIP) ice core drilled on the top of the Greenland Ice Sheet (Summit) have been analyzed for d8O. A highly detailed and continuous d8O profile has thus been obtained and is discussed in terms of past temperatures in Greenland. We also discuss a three-core stacked annual d8O profile for the past 917 years. The short-term (<50 years) variability of the annual d8O signal is found to be 1 per mil in the Holocene, and estimates for the coldest parts of the last glacial are 3 per mil or higher. These data also provide insights into possible disturbances of the stratigraphic layering in the core which seems to be sound down to the onset of the Eemian. Spectral analysis of highly detailed sequences of the profile helps determine the smoothing of the d8O signal, which for the Holocene ice is found to be considerably stronger than expected. We suggest this is due to a process involving diffusion of water molecules along crystal boundaries in the recrystallizing ice matrix. Deconvolution techniques were employed for restoring with great confidence the highly attenuated annual d8O signal in the Holocene. We confirm earlier findings of dramatic temperature changes in Greenland during the last glacial cycle. Abrupt and strong climatic shifts are also found within the Eem/Sangamon Interglaciation, which is normally recorded as a period of warm and stable climate in lower latitudes. The stratigraphic continuity of the Eemian layers is consequently discussed in section 3 of this paper in terms of all pertinent data which we are not able to reconcile.
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fees: 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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