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 language | English (US) |
|---|---|
| Pages (from-to) | 5137-5150 |
| Number of pages | 14 |
| Journal | Journal of Geophysical Research |
| Volume | 94 |
| Issue number | D4 |
| DOIs | |
| State | Published - Jan 1 1989 |
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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
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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 journal › Article
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.
PY - 1989/1/1
Y1 - 1989/1/1
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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UR - http://www.scopus.com/inward/citedby.url?scp=0024527815&partnerID=8YFLogxK
U2 - 10.1029/JD094iD04p05137
DO - 10.1029/JD094iD04p05137
M3 - Article
AN - SCOPUS:0024527815
VL - 94
SP - 5137
EP - 5150
JO - Journal of Geophysical Research
JF - Journal of Geophysical Research
SN - 0148-0227
IS - D4
ER -