Elemental and isotopic composition of occluded O2 and N2 in polar ice

Todd Anthony Sowers, M. Bender, D. Raynaud

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

We have analysed 13 samples of trapped air in recent (<2200 years B.P.) ice from eight sites. The average δ15N of N2 and δ18O of O2 in samples from the various ice cores ranged from +0.05 to +0.41 ‰ and from +0.18 to +1.1 ‰, respectively. The heavy isotope enrichments are apparently due to gravitational settling accompanying diffusive equilibrium between the base of the firn and the overlying atmosphere. The δO2/Ar and δN2/Ar values ranged from -9.2 to +1.0‰ and from -4.8 to +4.6‰, respectively. The differences between the elemental composition of ice core trapped gases and air result from gravitational fractionation, as well as separation of O2 and Ar relative to N2 during either bubble close-off or retrieval and storage of the ice core. -from Authors

Original languageEnglish (US)
Pages (from-to)5137-5150
Number of pages14
JournalJournal of Geophysical Research
Volume94
Issue numberD4
DOIs
StatePublished - Jan 1 1989

Fingerprint

Ice
ice core
ice
isotopic composition
Chemical analysis
firn
air
bubble
settling
bubbles
Fractionation
fractionation
Air
Isotopes
isotope
retrieval
isotopes
atmosphere
Gases
gases

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

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abstract = "We have analysed 13 samples of trapped air in recent (<2200 years B.P.) ice from eight sites. The average δ15N of N2 and δ18O of O2 in samples from the various ice cores ranged from +0.05 to +0.41 ‰ and from +0.18 to +1.1 ‰, respectively. The heavy isotope enrichments are apparently due to gravitational settling accompanying diffusive equilibrium between the base of the firn and the overlying atmosphere. The δO2/Ar and δN2/Ar values ranged from -9.2 to +1.0‰ and from -4.8 to +4.6‰, respectively. The differences between the elemental composition of ice core trapped gases and air result from gravitational fractionation, as well as separation of O2 and Ar relative to N2 during either bubble close-off or retrieval and storage of the ice core. -from Authors",
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Elemental and isotopic composition of occluded O2 and N2 in polar ice. / Sowers, Todd Anthony; Bender, M.; Raynaud, D.

In: Journal of Geophysical Research, Vol. 94, No. D4, 01.01.1989, p. 5137-5150.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Elemental and isotopic composition of occluded O2 and N2 in polar ice

AU - Sowers, Todd Anthony

AU - Bender, M.

AU - Raynaud, D.

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N2 - We have analysed 13 samples of trapped air in recent (<2200 years B.P.) ice from eight sites. The average δ15N of N2 and δ18O of O2 in samples from the various ice cores ranged from +0.05 to +0.41 ‰ and from +0.18 to +1.1 ‰, respectively. The heavy isotope enrichments are apparently due to gravitational settling accompanying diffusive equilibrium between the base of the firn and the overlying atmosphere. The δO2/Ar and δN2/Ar values ranged from -9.2 to +1.0‰ and from -4.8 to +4.6‰, respectively. The differences between the elemental composition of ice core trapped gases and air result from gravitational fractionation, as well as separation of O2 and Ar relative to N2 during either bubble close-off or retrieval and storage of the ice core. -from Authors

AB - We have analysed 13 samples of trapped air in recent (<2200 years B.P.) ice from eight sites. The average δ15N of N2 and δ18O of O2 in samples from the various ice cores ranged from +0.05 to +0.41 ‰ and from +0.18 to +1.1 ‰, respectively. The heavy isotope enrichments are apparently due to gravitational settling accompanying diffusive equilibrium between the base of the firn and the overlying atmosphere. The δO2/Ar and δN2/Ar values ranged from -9.2 to +1.0‰ and from -4.8 to +4.6‰, respectively. The differences between the elemental composition of ice core trapped gases and air result from gravitational fractionation, as well as separation of O2 and Ar relative to N2 during either bubble close-off or retrieval and storage of the ice core. -from Authors

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