GRIP Ice Core 248 KYr H2O2, HCHO, NH4+ and Ca2+ Data Fuhrer, K.; Neftel, A.; Anklin, M.; Maggi, V. Fuhrer, K. Neftel, A. Anklin, M. Maggi, V. earth science/paleoclimate/ice cores (calcium,bulk ice,null,parts per billion,null,ice cores,null,continuous flow analysis,N,null) earth science/paleoclimate/ice cores (ice age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (formaldehyde,bulk ice,null,parts per billion,null,ice cores,null,continuous flow analysis,N,null) earth science/paleoclimate/ice cores (ammonium,bulk ice,null,parts per billion,null,ice cores,null,continuous flow analysis,N,ppb by weight) earth science/paleoclimate/ice cores (hydrogen peroxide,bulk ice,null,parts per billion,null,ice cores,null,continuous flow analysis,N,null) earth science/paleoclimate/ice core (GRIP>LATITUDE 72.58>LONGITUDE -37.63) A new deep core drilling operation started in 1990 central Greenland and in 1992 reached the bottom at a depth of 3028 m.b. surface. Taking advantage of recent developments in the analytical technique of chemical trace species, continuous high resolution measurements of H2O2, HCHO, NH4+ and Ca2+ concentrations were performed directly on the ice core in the field. During the 1991 season all four components were measured simultaneously between 1300 m.b. surface and 2300 m.b. surface, corresponding to the time interval between 8000 and 38,000 years B.P. In this paper an overview of the results and our first interpretations in terms of climatic changes are given. STUDY NOTES: A continuous melting technique, combined with continuous flow analysis, has been utilized for measurements of chemical trace species H2O2, HCHO, NH4+ and Ca2+. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Fuhrer, K. Investigator : Neftel, A. Investigator : Anklin, M. Investigator : Maggi, V. 1997-11-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17842 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/hcho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/h2o2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/nh4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/hcho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/h2o2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/nh4.txt English https://www.ncdc.noaa.gov/paleo/study/17842 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/hcho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/h2o2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/nh4.txt Katrin Fuhrer, Albrecht Neftel, Martin Anklin, Valter Maggi1993Continuous measurements of hydrogen peroxide, formaldehyde, calcium and ammonium concentrations along the new grip ice core from summit, Central GreenlandAtmospheric Environment27121873-188010.1016/0960-1686(93)90292-7http://www.sciencedirect.com/science/article/pii/0960168693902927 START YEAR: 248190 cal yr BP * END YEAR: 307 cal yr BP -37.63 72.58 -37.63 72.58