Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples
文献类型：期刊论文
| 作者 | Sapart, C. J. |
| 刊名 | Atmospheric Measurement Techniques
 |
| 出版日期 | 2011 |
| 卷号 | 4期号:12页码:2607-2618 |
| ISSN号 | 1867-1381 |
| 中文摘要 | Methane and nitrous oxide are important greenhouse gases which show a strong increase in atmospheric mixing ratios since pre-industrial time as well as large variations during past climate changes. The understanding of their biogeochemical cycles can be improved using stable isotope analysis. However, high-precision isotope measurements on air trapped in ice cores are challenging because of the high susceptibility to contamination and fractionation. Here, we present a dry extraction system for combined CH4 and N2O stable isotope analysis from ice core air, using an ice grating device. The system allows simultaneous analysis of delta D(CH4) or delta C-13(CH4), together with delta N-15(N2O), delta O-18(N2O) and delta N-15(NO+ fragment) on a single ice core sample, using two isotope mass spectrometry systems. The optimum quantity of ice for analysis is about 600 g with typical "Holocene" mixing ratios for CH4 and N2O. In this case, the reproducibility (1 sigma) is 2.1% for delta D(CH4), 0.18% for delta C-13(CH4), 0.51% for delta N-15(N2O), 0.69% for delta O-18(N2O) and 1.12% for delta N-15(NO+ fragment). For smaller amounts of ice the standard deviation increases, particularly for N2O isotopologues. For both gases, small-scale intercalibrations using air and/or ice samples have been carried out in collaboration with other institutes that are currently involved in isotope measurements of ice core air. Significant differences are shown between the calibration scales, but those offsets are consistent and can therefore be corrected for. |
| 公开日期 | 2015-03-27 |
| 源URL | [http://ir.xtbg.org.cn/handle/353005/8489]  |
| 专题 | 西双版纳热带植物园_公共技术服务中心主要仪器相关文献_同位素质谱仪 |
| 推荐引用方式 GB/T 7714 | Sapart, C. J.. Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples[J]. Atmospheric Measurement Techniques,2011,4(12):2607-2618. |
| APA | Sapart, C. J..(2011).Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples.Atmospheric Measurement Techniques,4(12),2607-2618. |
| MLA | Sapart, C. J.."Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples".Atmospheric Measurement Techniques 4.12(2011):2607-2618. |
入库方式： OAI收割
来源：西双版纳热带植物园
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