Short-term variations of vapor isotope ratios reveal the influence of atmospheric processes
文献类型：期刊论文
| 作者 | Zhang Shichun1; Sun Xiaomin1; Wang Jianlin3; Yu Guirui1; Wen Xuefa1 |
| 刊名 | JOURNAL OF GEOGRAPHICAL SCIENCES
 |
| 出版日期 | 2011 |
| 卷号 | 21期号:3页码:401 |
| 关键词 | WATER-VAPOR RIVER-BASIN EVAPORATION PRECIPITATION DELTA-O-18 TRANSPIRATION OXYGEN FRACTIONATION DEUTERIUM HYDROGEN stables isotopes atmospheric water vapor precipitation TDLAS |
| ISSN号 | 1009-637X |
| 英文摘要 | Stable isotopes of atmospheric water vapor reveal rich information on water movement and phase changes in the atmosphere. Here we presented two nearly continuous time-series of delta D and delta O-18 of atmospheric water vapor (delta(v)) measured at hourly intervals in surface air in Beijing and above a winter wheat canopy in Shijiazhuang using in-situ measurement technique. During the precipitation events, the delta(v) values in both Beijing and Shijiazhuang were in the state of equilibrium with precipitation water, revealing the influence of precipitation processes. However, the delta(v) departures from the equilibrium state were positively correlated with local relative humidity. Note that the delta(v) tended to enrich in Beijing, but deplete in Shijiazhuang during the precipitation events, which mainly resulted from the influence of transpiration processes that enriched the delta(v) in Shijiazhuang. On seasonal time-scale, the delta(v) values were log-linear functions of water vapor mixing ratios in both Beijing and Shijiazhuang. The water vapor mixing ratio was an excellent predictor of the delta(v) by the Rayleigh distillation mechanisms, indicating that air mass advection could also play an important role in determining the delta(v). On a diurnal time-scale, the delta(v) reached the minimum in the early afternoon hours in Beijing which was closely related to the atmospheric processes of boundary layer entrainment. During the peak of growing season of winter wheat, however, the delta(v) reached the minimum in the early morning, and increased gradually through the daytime, and reached the maximum in the late afternoon, which was responsible by the interaction between boundary layer entrainment and the local atmospheric processes, such as transpiration and dew formation. This study has the implications for the important role of vegetation in determining the surface delta(v) and highlights the need to conduct delta(v) measurement on short-term (e.g. diurnal) time scales. |
| 资助项目 | [National Natural Science Foundation of China] ; [Ministry of Science and Technology of China] ; [Chinese Academy of Sciences] |
| 语种 | 英语 |
| 公开日期 | 2011-06-10 |
| 源URL | [http://192.168.22.105/handle/311030/4321]  |
| 专题 | 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 |
| 作者单位 | 1.中国科学院地理科学与资源研究所 2.中国科学院东北地理与农业生态研究所 3.Qingdao Agr University, Qingdao 266109, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Shichun,Sun Xiaomin,Wang Jianlin,et al. Short-term variations of vapor isotope ratios reveal the influence of atmospheric processes[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2011,21(3):401. |
| APA | Zhang Shichun,Sun Xiaomin,Wang Jianlin,Yu Guirui,&Wen Xuefa.(2011).Short-term variations of vapor isotope ratios reveal the influence of atmospheric processes.JOURNAL OF GEOGRAPHICAL SCIENCES,21(3),401. |
| MLA | Zhang Shichun,et al."Short-term variations of vapor isotope ratios reveal the influence of atmospheric processes".JOURNAL OF GEOGRAPHICAL SCIENCES 21.3(2011):401. |
入库方式： OAI收割
来源：地理科学与资源研究所
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