{"NOAAStudyId":"18695","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":"2015-05-29","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-18695.xml","doi":null,"earliestYearBP":67200,"earliestYearCE":-65250,"entryId":"noaa-icecore-18695","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"1043518, 1142041, 0944552, 0839093, 1142166"}],"investigators":"Rhodes, R.H.; Brook, E.J.; Chiang, J.C.H.; Blunier, T.; Maselli, O.J.; McConnell, J.R.; Romanini, D.; Severinghaus, J.","mostRecentYearBP":9800,"mostRecentYearCE":-7850,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18695","originalSource":null,"publication":[{"abstract":"The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biogeochemistry. In a new ice core record of atmospheric methane with ultrahigh temporal resolution, we find abrupt methane increases within Heinrich stadials 1, 2, 4, and 5 that, uniquely, have no counterparts in Greenland temperature proxies. Using a heuristic model of tropical rainfall distribution, we propose that Hudson Strait Heinrich events caused rainfall intensification over Southern Hemisphere land areas, thereby producing excess methane in tropical wetlands. Our findings suggest that the climatic impacts of Heinrich events persisted for 740 to 1520 years. ","author":{"name":"Rachael H. Rhodes, Edward J. Brook, John C.H. Chiang, Thomas Blunier, Olivia J. Maselli, Joseph R. McConnell, Daniele Romanini, Jeffrey P. Severinghaus"},"citation":"Rachael H. Rhodes, Edward J. Brook, John C.H. Chiang, Thomas Blunier, Olivia J. Maselli, Joseph R. McConnell, Daniele Romanini, Jeffrey P. Severinghaus. 2015. Enhanced tropical methane production in response to iceberg discharge in the North Atlantic. Science, 348(6238), 1016-1019. doi: 10.1126/science.1262005","edition":null,"identifier":{"id":"10.1126/science.1262005","type":"doi","url":"http://dx.doi.org/10.1126/science.1262005"},"issue":"6238","journal":"Science","pages":"1016-1019","pubRank":"1","pubYear":2015,"reportNumber":null,"title":"Enhanced tropical methane production in response to iceberg discharge in the North Atlantic","type":"publication","volume":"348"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"54696","geo":{"geoType":"Feature","geometry":{"coordinates":["-79.4676","-112.0865"],"type":"POINT"},"properties":{"easternmostLongitude":"-112.0865","maxElevationMeters":"1806","minElevationMeters":"1806","northernmostLatitude":"-79.4676","southernmostLatitude":"-79.4676","westernmostLongitude":"-112.0865"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"29074","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/wais2015ch4.txt","linkText":"WAIS  67.2-9.8 kaBP Continuous CH4 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":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"reported on the NOAA2004 scale","cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":"smoothed","cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per billion","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>methane"}]}],"dataTableName":"WAIS2015CH4","dataTableNotes":null,"earliestYear":67200,"earliestYearBP":67200,"earliestYearCE":-65250,"mostRecentYear":9800,"mostRecentYearBP":9800,"mostRecentYearCE":-7850,"species":[],"timeUnit":"cal yr BP"}],"siteName":"WAIS Divide WDC06A"}],"studyCode":null,"studyName":"WAIS Divide Ice Core 67.2-9.8 kaBP Continuous CH4 Data","studyNotes":"Ultra-high temporal resolution methane concentration data from West Antarctic Ice Sheet (WAIS) Divide (WD) ice core obtained by online, continuous technique.","version":"1.0","xmlId":"16377"}