noaa-icecore-17818 GISP2 Ice Core 110KYr Electrical Conductivity Measurements Taylor, K.C.; Alley, R.B.; Lamorey, G.W.; Mayewski, P.A. GISP2 Ice Core 110KYr Electrical Conductivity Measurements 2014-11-30 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17818 Investigator K.C. Taylor Investigator R.B. Alley Investigator G.W. Lamorey Investigator P.A. Mayewski earth science paleoclimate ice cores depth at sample start,null,null,meter,null,ice cores,null,null,N,null earth science paleoclimate ice cores electrical conductivity,bulk ice,null,microampere,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores ice age at sample start,null,null,calendar year before present,null,ice cores,null,null,N,null earth science paleoclimate ice core physical properties geoscientificInformation 110932 cal yr BP -33 cal yr BP Complete 72.6 72.6 -38.5 -38.5 3200 3200 Continent North America Greenland GISP2>LATITUDE 72.6>LONGITUDE -38.5 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 Kendrick C. Taylor, Richard B. Alley, Gregg W. Lamorey, Paul Mayewski 1997 Journal of Geophysical Research: Oceans 102 C12 26511-26517 10.1029/96JC02500 http://onlinelibrary.wiley.com/enhanced/doi/10.1029/96JC02500/

The Greenland Ice Sheet Project 2 (GISP2) electrical conductivity measurement (ECM) record is an indication of the concentration of H + in the core. The ECM detected seasonal variations in the nitrate concentration of the core which were used to assist in dating the core by annual layer counting. Volcanic eruptions that produce acidic aerosols are recorded in the ECM record. Evidence of biomass burning is detected by the ECM because fire-related ammonium emissions neutralize the acids in the core. Rapid climate transitions associated with the Younger Dryas and Dansgaard/Oeschger interstadial events alter the concentration of alkaline dust and are detected by the ECM. The ECM has been used to develop stratigraphic ties between the GISP2 and the Greenland Ice Core Project cores. Users of the data should be aware of some instrument-related artifacts in the ECM record. STUDY NOTES: GISP2 Electrical Conductivity Measurements (ECM), 1mm raw measurements and 0.5 meter averages with age.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/ecm/ecmage.txt Data File; GISP2 ECM 0.5 meter averages GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/ecm/ecminfo.txt Information File; GISP2 ECM Data Description GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/ecm/ Data Folder; GISP2 ECM Continuous (1mm) Data Files USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11