{"NOAAStudyId":"17803","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"1997-11-30","dataPublisher":"NOAA","dataType":"ICE CORES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-icecore-17803.xml","doi":null,"earliestYearBP":-43,"earliestYearCE":1993,"entryId":"noaa-icecore-17803","funding":[],"investigators":"Dibb, J.; Jaffrezo, J.-L.","mostRecentYearBP":-44,"mostRecentYearCE":1994,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/17803","originalSource":null,"publication":[{"abstract":"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.","author":{"name":"Jack E. Dibb and Jean-Luc Jaffrezo"},"citation":"Jack E. Dibb and Jean-Luc Jaffrezo. 1997. Air-snow exchange investigations at Summit, Greenland: An overview. Journal of Geophysical Research: Oceans, 102(C12), 26795-26807. doi: 10.1029/96JC02303","edition":null,"identifier":{"id":"10.1029/96JC02303","type":"doi","url":"http://dx.doi.org/10.1029/96JC02303"},"issue":"C12","journal":"Journal of Geophysical Research: Oceans","pages":"26795-26807","pubRank":"1","pubYear":1997,"reportNumber":null,"title":"Air-snow exchange investigations at Summit, Greenland: An overview","type":"publication","volume":"102"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19978","geo":{"geoType":"Feature","geometry":{"coordinates":["72.6","-38.5"],"type":"POINT"},"properties":{"easternmostLongitude":"-38.5","maxElevationMeters":"3200","minElevationMeters":"3200","northernmostLatitude":"72.6","southernmostLatitude":"72.6","westernmostLongitude":"-38.5"}},"locationName":"Continent>North America>Greenland","mappable":"Y","paleoData":[{"NOAADataTableId":"28122","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice 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material>precipitation>snow","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"micromole per liter","cvWhat":"chemical composition>compound>inorganic compound>hydrogen peroxide"}]},{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem/perxpits.txt","linkText":"GISP2 H2O2 Snow Pit Data","urlDescription":"Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>precipitation>snow","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>precipitation>snow","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"unspecified unit","cvWhat":"chemical composition>compound>inorganic compound>hydrogen peroxide"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age>ice age"}]}],"dataTableName":"GISP21997atm","dataTableNotes":null,"earliestYear":1993,"earliestYearBP":-43,"earliestYearCE":1993,"mostRecentYear":1994,"mostRecentYearBP":-44,"mostRecentYearCE":1994,"species":[],"timeUnit":"AD"}],"siteName":"GISP2"}],"studyCode":null,"studyName":"GISP2 Aerosol Concentrations","studyNotes":"Measured aerosol concentrations from the GISP2 atmospheric sampling site (ATM) during the 1993 and 1994 summer field seasons.  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