{"NOAAStudyId":"17837","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-17837.xml","doi":null,"earliestYearBP":4,"earliestYearCE":1946,"entryId":"noaa-icecore-17837","funding":[],"investigators":"Kahl, J.D.W.; Martinez, D.A.; Kuhns, H.; Davidson, C.I.; Jaffrezo, J.-L.; Harris, J.M.","mostRecentYearBP":-39,"mostRecentYearCE":1989,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/17837","originalSource":null,"publication":[{"abstract":"The seasonal variation in atmospheric transport patterns to Summit, Greenland, is examined using a 44-year record of daily, 10-day, isobaric back trajectories at the 500-hPa level. Over 24,000 modeled trajectories are aggregated into distinct patterns using cluster analysis. Ten-day trajectories reaching Summit are longest during winter, with 67% extending upwind (westward) as far back as Asia or Europe. Trajectories are shortest during summer, with 46% having 10-day origins over North America. During all seasons a small percentage (3-7%) of trajectories originate in west Asia/Europe and follow a meridional path over the Arctic Ocean before approaching Summit from the northwest. Trajectories at the 700-hPa level tend to be shorter than at 500 hPa, with many of the 700-hPa trajectories from North America tracking over the North Atlantic and approaching Summit from the south. The long-range transport climatology for Summit is similar to a year-round climatology prepared for Dye 3, located 900 km to the south [Davidson et al., 1993b]. An analysis of several aerosol species measured at Summit during summer 1994 reveals examples of the usefulness and also the limitations of using long-range air trajectories to interpret chemical data.","author":{"name":"Jonathan D. W. Kahl, Dewayne A. Martinez, Hampden Kuhns, Clifford I. Davidson, Jean‐Luc Jaffrezo, Joyce M. Harris"},"citation":"Jonathan D. W. Kahl, Dewayne A. Martinez, Hampden Kuhns, Clifford I. Davidson, Jean‐Luc Jaffrezo, Joyce M. Harris. 1997. Air mass trajectories to Summit, Greenland: A 44-year climatology and some episodic events. Journal of Geophysical Research: Oceans, 102(C12), 26861-26875. doi: 10.1029/97JC00296","edition":null,"identifier":{"id":"10.1029/97JC00296","type":"doi","url":"http://dx.doi.org/10.1029/97JC00296"},"issue":"C12","journal":"Journal of Geophysical Research: Oceans","pages":"26861-26875","pubRank":"1","pubYear":1997,"reportNumber":null,"title":"Air mass trajectories to Summit, Greenland: A 44-year climatology and some episodic events","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":"28156","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>instrumental data"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/traject.txt","linkText":"GISP2 Atmospheric Trajectory Readme File","urlDescription":"Information File","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>ice core>instrumental data"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/500traj/","linkText":"500mb Trajectory Data","urlDescription":"Data Folder","variables":[{"cvAdditionalInfo":"500 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"hour of day","cvWhat":"age variable>age"},{"cvAdditionalInfo":"500 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"month of year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"500 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"day of month","cvWhat":"age variable>age"},{"cvAdditionalInfo":"500 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree north","cvWhat":"sampling metadata>latitude"},{"cvAdditionalInfo":"500 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree east","cvWhat":"sampling metadata>longitude"}]},{"NOAAKeywords":["earth science>paleoclimate>ice core>instrumental data"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/700traj/","linkText":"700mb Trajectory Data","urlDescription":"Data Folder","variables":[{"cvAdditionalInfo":"700 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"hour of day","cvWhat":"age variable>age"},{"cvAdditionalInfo":"700 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"month of year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"700 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"day of month","cvWhat":"age variable>age"},{"cvAdditionalInfo":"700 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree north","cvWhat":"sampling metadata>latitude"},{"cvAdditionalInfo":"700 mb trajectory","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree east","cvWhat":"sampling metadata>longitude"}]}],"dataTableName":"GISP21997airtraj","dataTableNotes":null,"earliestYear":1946,"earliestYearBP":4,"earliestYearCE":1946,"mostRecentYear":1989,"mostRecentYearBP":-39,"mostRecentYearCE":1989,"species":[],"timeUnit":"AD"}],"siteName":"GISP2"}],"studyCode":null,"studyName":"GISP2 Ice Core GISP2 Air Mass Trajectories","studyNotes":"The included data sets are files for 500 mb and 700 mb atmospheric\ntrajectories for the Greenland Summit.","version":"1.0","xmlId":"15541"}