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17 Titles Match Your Query
Showing 1 through 17 of 17
1. Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA) [NSF-ANT08-38849]
This award supports a project to generate an absolute timescale for the Allan Hills Blue Ice Area (BIA), and then to reconstruct details of past climate changes and greenhouse gas concentrations for ...


2. Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica [NSF-ANT06-36731]
This project studies ancient ice buried in the Dry Valleys of Antarctica. The ice, which may approach ten million years in age, will be dated using argon and uranium radioisotope techniques. High-risk ...


3. Concentration and Isotopic Composition of O2 and N2 in Trapped Gases of the Vostok Ice Core [NSIDC-0107]
These data describe the d18O of O2, d15N of N2, d18Oatm, and O2/N2 ratios of trapped gases in the Vostok ice core from East Antarctica. The investigator used a mass spectrometer to measure gas concentrations ...


4. Siple Dome Core Date from Measurement of the d18O of Paleoatmospheric Oxygen [NSIDC-0123]
This data set is part of the West Antarctic Ice Sheet Cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. ...


5. Vostok Ice Core Chemistry, Timescale, Isotope, and Temperature Data [NSIDC-0242]
This data set contains ice core chemistry, timescale, isotope, and temperature data analyzed by several investigators. In January 1998, the collaborative ice-drilling project between Russia, the ...


6. Firn Air Inert Gas and Oxygen Observations from Siple Dome, 1996, and the South Pole, 2001 [NSIDC-0290]
This data set includes gas ratios in polar firn air: O2/N2, 15N/14N, 40Ar/N2, 40Ar/36Ar, 40Ar/38Ar, ...


7. Trapped Gas Composition and Chronology of the Vostok Ice Core [NSIDC-0311]
This data set includes a time scale for the Vostok ice core, retrieved from Vostok Station on the East Antarctic Plateau. This chronology is derived by orbitally tuning to molecular oxygen to nitrogen ...


8. O2/N2/Ar ratios, and the isotopic composition of O2 and N2, in firn air from the Megadunes site, Antarctica [O2_N2_Ar_Megadunes]
In a program led by Jeffrey Severinghaus, Scripps Institiution of Oceanography, firn air samples were collected at the Megadunes site, Antarctica. This site is marked by actively migrating ...


9. O2/N2/Ar ratios, and the isotopic composition of O2 and N2, in ice from Mullins Valley, Dry Valleys, Antarctica [gas_comp_Dry_Valleys]
This data set contains preliminary results of the study of the isotopic composition of O2 and N2, and the O2/N2/Ar ratio, in ice samples from Mullins Valley, Dry Valleys, Antarctica. ...


10. The concentration of O2, N2, and Ar, and the isotopic composition of N2 and O2, in GISP2 (reanalysis of selected samples) [Conc_isotopic_O2_N2_Ar_GISP2]
This data set includes values of the O2/N2/Ar ratio, and the d15N an d18O, of trapped gases from about 30 depths in the GISP2 ice core between 40-100 ka. Samples were analyzed in 2005.


11. Gross and Net Oxygen Production Measured during the JGOFS North Atlantic Bloom Experiment (NABE) [JGOFS_NABE_OXPROD]
The Joint Global Ocean Flux Study (JGOFS) seeks to understand the processes that control the transfer of carbon and other biologically active elements in the ocean. In addition, ...


12. Net and Gross Oxygen Production Measured during the JGOFS Equatorial Pacific Process Study [JGOFS_EQPAC_OXYGEN]
The Equatorial Pacific Process Study (EQPAC) was conducted along 140 deg W longitude during 1992. Four cruises took place: February 3 - March 9, March 19 - April ...


13. Oxygen Production and Respiration Rates Measured during the U.S. JGOFS Arabian Sea Process Study [USJGOFS_ARAB_O2_PRODUCTION]
A component of U.S. Joint Global Ocean Flux Study (JGOFS) is the Arabian Sea Process Study.. Eleven cruises took place aboard the R/V Thomas G. Thompson for about sixteen ...


14. Vostok Antarctic Ice Core Data for 420,000 years, from WDC Paleoclimatology [EARTH_LAND_NGDC_PALEO_VOSTOK1]
The Vostok Ice Core Data is one of the primary Antarctic Paleoclimate Datasets. It covers the time from the present back to 422,000 years before the present. It is available from the World ...


15. Fractionation of gases in polar ice during bubble close-off: firn air Ne, Kr and Xe observations [severinghaus_nsidc0290]
Gas ratios in air withdrawn from polar firn (snowpack) show systematic enrichments of Ne/N2, O2/N2 and Ar/N2, in the firn?ice transition region where bubbles are closing off. Air from ...


16. The concentration and isotopic composition of O2, N2, and Ar in trapped gases of the Vostok ice core (reanalysis) [Vostok_gases_O2_N2_Ar]
Samples were reanalyzed from the Vostok ice core for the O2/N2/Ar ratio, and the isotopic composition of O2 and N2, at approximately 1 kyr resolution between 110 -400 ka. This work defined the d18O ...


17. Triple isotope composition of atmospheric O2 [TRIPLE_ISO_COMP_PALEOATM_02]
This data set contains results from a study of the triple isotope composition of atmospheric O2, obtained by analysis of the GISP2 and Siple Dome ice cores. Results are expressed as D17O, where D17O ...


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