Intercomparison of Four Commercial Analyzers for Water Vapor Isotope Measurement
文献类型：SCI/SSCI论文
| 作者 | Wen X. F. ; Lee X. H. ; Sun X. M. ; Wang J. L. ; Tang Y. K. ; Li S. G. ; Yu G. R. |
| 发表日期 | 2012 |
| 关键词 | cavity-output spectroscopy ratio mass-spectrometry ring-down spectroscopy eddy covariance stable-isotopes delta-o-18 delta-h-2 absorption calibration samples |
| 英文摘要 | The delta O-18 and delta D of atmospheric water vapor are important tracers in hydrological and ecological studies. Isotope ratio infrared spectroscopy (IRIS) provides an in situ technology for measuring delta O-18 and delta D in ambient conditions. An intercomparison experiment was carried out with four commercial IRIS analyzers to characterize their performance and transferability of calibration methods. Over a 15-day atmospheric measurement, during which the water vapor concentration ranged from 14 to 27 mol mol(-1) and the isotopic ratios spanned about 90 parts per thousand and 13 parts per thousand for delta D and delta O-18. respectively, these analyzers tracked the natural variability in ambient conditions very well and achieved an average difference between one another within 2 parts per thousand, for delta D and within 0.1 parts per thousand for delta O-18 after calibration at appropriate frequencies. Two of the calibration methods (discrete liquid water injection and continuous dripping) agreed with each other within the tolerance thresholds of 2 parts per thousand for delta D and 0.1 parts per thousand for delta O-18. The Rayleigh distillation technique appeared to be acceptable as a calibration standard for delta D but not for delta O-18. The delta D measurements were less prone to concentration dependence errors than the delta O-18 measurements. The concentration dependence underscores the importance of using a calibration procedure at multiple mixing ratios to bracket the range of natural variability. |
| 出处 | Journal of Atmospheric and Oceanic Technology |
| 卷 | 29 |
| 期 | 2 |
| 页 | 235-247 |
| 收录类别 | SCI |
| ISSN号 | 0739-0572 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/26748]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wen X. F.,Lee X. H.,Sun X. M.,et al. Intercomparison of Four Commercial Analyzers for Water Vapor Isotope Measurement. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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