{"NOAAStudyId":"22401","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":"2017-07-18","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-22401.xml","doi":null,"earliestYearBP":180,"earliestYearCE":1770,"entryId":"noaa-icecore-22401","funding":[],"investigators":"Stenni, B.; Caprioli, R.; Cimino, L.; Cremisini, C.; Flora, O.; Gragnani, R.; Longinelli, A.; Maggi, V.; Torcini, S.","mostRecentYearBP":-42,"mostRecentYearCE":1992,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22401","originalSource":null,"publication":[{"abstract":"A 42.2 m firn core was collected at the Hercules Nèvé Plateau (100 km inland and 2960 m a.s.l.) in Northern Victoria Land, during the 1994-95 Italian Antarctic Expedition. Chemical (Cl-, NO3-, SO4-2 and H2O2) and isotope (d18O) analyses were performed to evaluate the snow-accumulation rate at this site. Tritium measurements were performed in the upper part of the core in order to narrow down the dating of the core. High nss SO4-2 concentrations seem to be related to some explosive volcanic eruptions, such as Tambora (1815) and the preceding event called \"Unknown\" (A.D. 1809), Coseguina (A.D. 1835), Makjan (A.D. 1861), Krakatoa (A.D. 1883) and Tarawera (A.D. 1886). A comparison between the seasonal variations observed in the isotope and chemical profiles was carried out in order to reduce the dating uncertainty, using the tritium and the volcanic markers as time constraints. A deposition period of 222 years was thus determined. The 3 year smoothed d18O profile shows more negative values from the bottom of the core (dated A.D. 1770) throughout all the 19th century, suggesting 'cooler' conditions in agreement with other East Antarctic ice-core records. Subsequently, a general increase in d18O values is observed. The calculated average snow-accumulation rates between the above-mentioned time markers are 111-129 kg m-2 a-1.","author":{"name":"B. Stenni, R. Caprioli, L. Cimino, C. Cremisini, O. Flora, R. Gragnani, A. Longinelli, V. Maggi and S. Torcini"},"citation":"B. Stenni, R. Caprioli, L. Cimino, C. Cremisini, O. Flora, R. Gragnani, A. Longinelli, V. Maggi and S. Torcini. 1999. 200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica. Annals of Glaciology, 29, 106-112. ","edition":null,"identifier":{"id":"N/A","type":"online resource","url":"https://www.igsoc.org/annals/29/"},"issue":null,"journal":"Annals of Glaciology","pages":"106-112","pubRank":"1","pubYear":1999,"reportNumber":null,"title":"200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica","type":"publication","volume":"29"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57354","geo":{"geoType":"Feature","geometry":{"coordinates":["-73.1","165.4"],"type":"POINT"},"properties":{"easternmostLongitude":"165.4","maxElevationMeters":"2960","minElevationMeters":"2960","northernmostLatitude":"-73.1","southernmostLatitude":"-73.1","westernmostLongitude":"165.4"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"33523","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>accumulation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/hercules/hercules1999accum.txt","linkText":"Hercules Nèvé Ice Core Accumulation Data","urlDescription":"Formatted Text Data File","variables":[{"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"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"kilogram per square meter per year","cvWhat":"formation property>formation rate>accumulation rate"}]}],"dataTableName":"HerculesHN45accum","dataTableNotes":null,"earliestYear":1770,"earliestYearBP":180,"earliestYearCE":1770,"mostRecentYear":1992,"mostRecentYearBP":-42,"mostRecentYearCE":1992,"species":[],"timeUnit":"AD"},{"NOAADataTableId":"33524","coreLengthMeters":42,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/hercules/hercules1999d18o.txt","linkText":"Hercules Nèvé Ice Core d18O Data","urlDescription":"Formatted Text Data File","variables":[{"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"},{"cvAdditionalInfo":"uncertainty 0.05 per mil","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"HerculesHN45d18O","dataTableNotes":"Mean annual snow accumulation rate (119 kg/m2/yr)","earliestYear":1770,"earliestYearBP":180,"earliestYearCE":1770,"mostRecentYear":1992,"mostRecentYearBP":-42,"mostRecentYearCE":1992,"species":[],"timeUnit":"AD"}],"siteName":"Hercules Névé"}],"studyCode":null,"studyName":"Hercules Nèvé, Antarctica 220 Year Ice Core d18O and Accumulation Data","studyNotes":"Herlules Névé, Antarctica ice core d18O and accumulation data for the past 220 years.","version":"1.0","xmlId":"20536"}