noaa-icecore-17803 GISP2 Aerosol Concentrations Dibb, J.; Jaffrezo, J.-L. GISP2 Aerosol Concentrations 1997-11-30 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17803 Investigator J. Dibb Investigator J.-L. Jaffrezo earth science paleoclimate instrumental collection date,null,null,null,null,instrumental,null,null,C,null earth science paleoclimate ice cores ice age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate instrumental sodium,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental potassium,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental hydrogen peroxide,snow,null,micromole per liter,null,instrumental,null,null,N,null earth science paleoclimate ice cores delta 18O,snow,null,per mil SMOW,null,ice cores,null,null,N,null earth science paleoclimate instrumental methanesulfonic acid,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental sulfate,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental ammonium,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate ice cores hydrogen peroxide,snow,null,unspecified unit,null,ice cores,null,null,N,null earth science paleoclimate instrumental collection date,null,null,day of year,null,instrumental,null,null,N,null earth science paleoclimate instrumental hydrogen peroxide,bulk atmosphere,null,parts per billion,null,instrumental,null,null,N,null earth science paleoclimate ice cores depth,null,null,meter,null,ice cores,null,null,N,null earth science paleoclimate instrumental calcium,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental magnesium,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate instrumental nitrate,bulk atmosphere,null,nanomole per cubic meter,null,instrumental,null,ion chromatography,N,aerosol filter sampling earth science paleoclimate ice core chemistry geoscientificInformation 1993 AD 1994 AD -43 cal yr BP -44 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 Jack E. Dibb and Jean-Luc Jaffrezo 1997 Journal of Geophysical Research: Oceans 102 C12 26795-26807 10.1029/96JC02303 http://onlinelibrary.wiley.com/enhanced/doi/10.1029/96JC02303/

The Greenland Ice Sheet Project 2 (GISP2) and Greenland Ice Core Project (GRIP) deep drilling programs at Summit, Greenland included support (both logistical and scientific) of extensive investigation of atmospheric transport and air-snow exchange processes of gases and particles relevant to the interpretation of the ice-core records. Much of the sampling for the air-snow exchange investigations was conducted at a unique solar-powered camp 30 km southwest of the GISP2 drill camp (even further from the GRIP camp) and was characterized by a high degree of international collaboration and cooperation. The wide range of expertise and analytical capabilities of the 20-plus investigators participating in these studies has provided important insight into the meteorological, physical, and chemical processes which interact to determine the composition of snow and firn at Summit. Evolving understanding of this system will allow improved reconstruction of the composition of the atmosphere over Greenland in the past from the detailed Summit ice-core records. This paper provides an overview of air-snow exchange investigations at Summit, including their development through the course of the drilling programs (1989-1993), significant findings related to both air-snow exchange issues and the present state of the Arctic free troposphere, as well as the major outstanding questions which are being addressed in ongoing experiments at Summit. STUDY NOTES: Measured aerosol concentrations from the GISP2 atmospheric sampling site (ATM) during the 1993 and 1994 summer field seasons.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem/aerosol.txt Data File; ATM aerosol concentrations GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem/perxpits.txt Data File; GISP2 H2O2 Snow Pit Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem/perxair.txt Data File; ATM Concentration of H2O2 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem/perxsnow.txt Data File; GISP2 Concentration of H2O2 in surface snow USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11