Continuous measurement of water vapor D/H and 18O/16O isotope ratios in the atmosphere
文献类型：EI期刊论文
| 作者 | Yu Gui-Rui
|
| 发表日期 | 2008 |
| 关键词 | Hydrogen Isotopes Oxygen Semiconductor lasers |
| 英文摘要 | The D/H and 18O/16O ratios in atmospheric water vapor provide rich information on the hydrological cycle and gaseous exchange processes between the terrestrial vegetation and the atmosphere. In this paper, we have demonstrated the feasibility to simultaneously measure both D/H and 18O/16O in atmospheric water vapor using a tunable diode laser absorption spectrometer. Our laboratory tests showed that the 1-h precision (one standard deviation) was 1.1‰ for D/H and 0.07‰ for 18O/16O at the dewpoint temperature of 15 °C. The difference between the laser measurement and cold trap/mass spectrometer analysis was 1.2 ± 6.0‰ (hourly mean ± one standard deviation) for D/H and 1.1 ± 1.3‰ for 18O/16O. Our atmospheric measurement captured the rapidly changing isotopic signals in both D/H and 18O/16O. The measured isotope ratios were highly correlated with the water vapor mixing ratio as expected and followed very closely the Global Meteoric Water Line except during two transitional periods when the deuterium excess of atmospheric vapor deviated from the standard value. In addition, we have refined a method to provide independent, timely performance test of the in situ system. © 2007 Elsevier B.V. All rights reserved. |
| 出处 | Journal of Hydrology
 |
| 卷 | 349期:3-4页:489-500 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24516]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心 |
| 推荐引用方式 GB/T 7714 | Yu Gui-Rui. Continuous measurement of water vapor D/H and 18O/16O isotope ratios in the atmosphere. 2008. |
入库方式： OAI收割
来源：地理科学与资源研究所
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