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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhu, RenBin Liu, YaShu Xu, Hua Ma, Jing Sun, LiGuang |
| Copyright Year | 2008 |
| Abstract | During the 22nd Chinese Antarctic Research Expedition (CHINARE-22), the atmospheric gas samples above the oceanic surface and near the surface were collected on the track for the scientific ship “Xuelong” and on Millor Peninsula of eastern Antarctica, respectively, using the Tedlar gas bags. Every day the sampling times were 10:00 and 22:00 (local time), respectively. In the laboratory, high-precision measurement of the isotopic compositions for N$_{2}$O in these gas samples was conducted using Thermo Finnigan MAT-253 Isotopic Mass Spectrometer with a fully automated interface for the pre-GC concentration (PreCon) of trace gases. The temporal and spatial variations of δ $^{15}$N and δ $^{18}$O in atmospheric N$_{2}$O were analyzed. The mean δ $^{15}$N and δ $^{18}$O-N$_{2}$O values above the oceanic surface were (7.21±0.50)‰ and (44.52±0.52)‰, respectively. From 30°N to Antarctica, the δ $^{15}$N (6.05‰–7.88‰) linearly increased with the rate of about 0.01‰ with the latitude while the δ $^{18}$O (43.05‰–48.78‰) showed a large fluctuation. The δ $^{15}$N negatively correlated with air temperature and N$_{2}$O concentration, and slightly positively correlated with δ $^{18}$O. The summertime variations of δ $^{15}$N and δ $^{18}$O-N$_{2}$O appeared the same trend on Millor Peninsula of eastern Antarctica. They significantly positively correlated with each other and negatively with N$_{2}$O concentration. The δ $^{15}$N and δ $^{18}$O-N$_{2}$O at different sites averaged (7.42±0.35)‰ and (44.69±0.49)‰, respectively, slightly higher than those above the oceanic surface, significantly higher than those of atmospheric N$_{2}$O in the low-latitude regions of Northern Hemisphere. The predominant factors affecting the spatial variations of δ $^{15}$N and δ $^{18}$O values were also discussed. The isotopic data given in this study can help to investigate the global and regional N$_{2}$O budgets. |
| Starting Page | 899 |
| Ending Page | 910 |
| Page Count | 12 |
| File Format | |
| ISSN | 10069313 |
| Journal | Science in China Series D: Earth Sciences |
| Volume Number | 51 |
| Issue Number | 6 |
| e-ISSN | 18622801 |
| Language | English |
| Publisher | SP Science in China Press |
| Publisher Date | 2008-05-17 |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | nitrous oxide Antarctica atmosphere δ $^{15}$N δ $^{18}$O isotope ocean Geosciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
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