2024-03-28T08:23:41Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-00982023-05-23T20:36:15Zbrokered
NSIDC-0098Firn Air Isotope and Temperature Measurements from Siple Dome and South PoleSeveringhaus, J. P., A. Grachev, and M. Battle.Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole2001-01-01Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/N51N7Z2Phttps://doi.org/10.7265/N51N7Z2PNSIDC-0098InvestigatorJeffreyP.Severinghausjseveringhaus@ucsd.edu1-858-822.24831-858-822.3310Scripps Institution of Oceanography9500 Gilman Dr.La JollaCA92037-0244USAInvestigatorA.GrachevScripps Institution of Oceanography,University of California at San DiegoInvestigatorMarkBattleBowdoin College,Brunswick, MaineTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCEPaleoclimateIce Core RecordsIce Core Air Bubbles Firn AirEARTH SCIENCETerrestrial HydrosphereGlaciers/Ice SheetsIce Sheets Firn Air IsotopesEARTH SCIENCECryosphereGlaciers/Ice SheetsIce Sheets Firn Air IsotopesEARTH SCIENCEPaleoclimateIce Core RecordsIsotopes Firn Air IsotopesEARTH SCIENCETerrestrial HydrosphereSnow/IceSnow/Ice Temperature Firn TemperatureEARTH SCIENCECryosphereSnow/IceSnow/Ice Temperature Firn TemperatureAGDC-projectAntarcticaArgon IsotopesAtmospheric GasesBoreholesFirn Air Isotope MeasurementsFirn Air IsotopesFirn IsotopesFirn Temperature MeasurementsGas IsotopesIce Core Gas RecordsIsotopic AnomaliesIsotopic HistoryKryptonmass spectrometersMass SpectrometryNitrogen IsotopesNSIDCNSIDC-0098Oxygen IsotopesPolar Firn AirSeasonal Temperature ChangesSeasonal Temperature GradientsShallow Firn AirSiple DomeSouth PoleThermal DiffusionThermal FractionationTrapped Air BubblesXenonFLASKSMASS SPECTROMETERSTHERMISTORSGROUND STATIONSGROUND STATIONSGROUND-BASED OBSERVATIONSGROUND-BASED OBSERVATIONS1998-01-141998-07-28complete-89.997-89.997-102-102-81.667-81.667-148.767-148.767ContinentAntarcticaSiple Dome1 m to 9 mEnglishAGDCFTP1 - 5 KBASCIIFTP1 - 5 KBExcelhttp://nsidc.org/data/docs/agdc/nsidc0098_severinghaus/images/nsi0098_locator.jpgSample Location MapSeveringhaus, J.P., A. Grachev, and M. Battle. 2001. Thermal
fractionation of air in polar firn by seasonal temperature gradients.
Geochemistry, Geophysics, Geosystems [online journal] 2: Paper
no. 2000GC000146.
Severinghaus, J.P. and E.J. Brook, 1999. Abrupt climate change at the
end of the last glacial period inferred from trapped air in polar
ice. Science 286: 930-934.This data set includes d15N, d18O/2, dO2/N2/4, d40Ar/4, d38/Ar/2,
d84Kr/48, and d132Xe/96 values for air drawn from the top 15 to 50 m
of firn at the South Pole (summer and winter 1998) and a site at Siple
Dome (summers 1996 and 1998). Data also include related firn
temperature measurements.
The objective of this research was to better understand thermal
fractionation processes affecting records of atmospheric history from
firn and ice core gases. Recent work (e.g., Severinghaus and Brook,
1999) has exploited trapped air in ice and deep firn as a record of
past atmospheric composition and climate change. Interpretation of these paleoclimate archives is complicated by artifacts of thermal
diffusion, a process in which heavier gases migrate down temperature
gradients toward colder regions in the firn. Seasonal temperature
change at the snow surface creates strong temperature gradients in the
top few meters of the firn, which cause isotopic fractionation of firn
gases. A specific goal of this research is to identify any long-term
effects of seasonal temperature fluctuations on firn air isotopic
anomalies.VIEW RELATED INFORMATIONhttps://doi.org/10.7265/N51N7Z2PDocumentationGET DATAhttp://www.usap-dc.org/view/dataset/609098Get External DataUSA/NOAACEOS IDN DIFVERSION 9.92001-01-012023-05-23NSIDCVersion SummaryNSIDCMinor VersionNSIDCCurrent Version1NSIDCFull Dataset CitationSeveringhaus, J. P., A. Grachev, and M. Battle. 2001. <i>Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole.</i> [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. <a href="https://doi.org/10.7265/N51N7Z2P">https://doi.org/10.7265/N51N7Z2P</a>. [Date Accessed].NSIDCRetiredfalse