Investigating the role of evaporation in dew formation under different climates using O-17-excess
文献类型：期刊论文
| 作者 | Tian, Chao3,4; Jiao, Wenzhe4; Beysens, Daniel6,7; Kaseke, Kudzai Farai2,4; Medici, Marie-Gabrielle5; Li, Fadong1,3; Wang, Lixin4 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2021 |
| 卷号 | 592页码:13 |
| 关键词 | Drylands Ecohydrology Equilibrium fractionation Kinetic fractionation Stable isotopes |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2020.125847 |
| 通讯作者 | Wang, Lixin(lxwang@iupui.edu) |
| 英文摘要 | With increasing aridity in many regions, dew is likely to play an increasingly important role in the ecohydrological processes in many ecosystems, especially in arid and semiarid regions. Few studies investigated the role of evaporation during dew formation and how it varies under different climate settings. O-17-excess, as a new tracer, could be used to extract information of evaporation dynamics from natural water samples (e.g., precipitation, river, and lake). Therefore, to fill the knowledge gap in evaporation mechanisms during dew formation, we report the isotopic variation (delta H-2, delta O-18, delta O-17, and O-17-excess) of dew and precipitation from three distinct climatic regions (i.e., Gobabeb in the central Namib Desert, Nice in France with Mediterranean climate, and Indianapolis in the central United States with humid continental climate). We examined whether dew formed in different climate settings was affected by different degree of evaporation using observed isotopic values and evaporation models during the formation processes, and modeled the effects of key meteorological variables (i.e., temperature and relative humidity) on O-17-excess variations. The results showed that dew in Gobabeb experienced kinetic fractionation associated with evaporation under non-steady state conditions during dew formation with enriched delta O-18 and low O-17-excess values. Dew formations with temperatures over 14.7 degrees C in Indianapolis were also influenced by evaporation under non-steady state conditions. However, dew formation in Nice did not experience significant evaporation. Evaporation processes (equilibrium or kinetic fractionation) occurring during nights with heavy dew under three climate settings were mainly related to the variation of atmosphere relative humidity. The O-17-excess tracer provides a new method to distinguish the different evaporation processes (equilibrium or kinetic fractionation) during dew formation and our result provides an improved understanding of dew formation. |
| WOS关键词 | MOISTURE SOURCE ; WATER ; PRECIPITATION ; DELTA-O-18 ; OXYGEN ; FRACTIONATION ; SPECTROSCOPY ; DEPOSITION ; DELTA-H-2 ; ISOTOPES |
| 资助项目 | Indiana University-Purdue University Indianapolis Research Support Funds Grant ; President's International Research Awards from Indiana University, U.S. National Science Foundation[EAR-1554894] ; National Science Foundation of China[42007155] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000639844900057 |
| 出版者 | ELSEVIER |
| 资助机构 | Indiana University-Purdue University Indianapolis Research Support Funds Grant ; President's International Research Awards from Indiana University, U.S. National Science Foundation ; National Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/162743]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Lixin |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Indiana Univ Purdue Univ Indianapolis IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA 5.Univ Nice, LPMC, CNRS, UMR 7336, F-06108 Nice 2, France 6.PSL Res Univ, Sorbonne Univ, Sorbonne Paris Cite, Phys & Mecan Milieux Heterogenes,ESPCI,CNRS, F-75005 Paris, France 7.OPUR, 2 Rue Verderet, F-75016 Paris, France |
| 推荐引用方式 GB/T 7714 | Tian, Chao,Jiao, Wenzhe,Beysens, Daniel,et al. Investigating the role of evaporation in dew formation under different climates using O-17-excess[J]. JOURNAL OF HYDROLOGY,2021,592:13. |
| APA | Tian, Chao.,Jiao, Wenzhe.,Beysens, Daniel.,Kaseke, Kudzai Farai.,Medici, Marie-Gabrielle.,...&Wang, Lixin.(2021).Investigating the role of evaporation in dew formation under different climates using O-17-excess.JOURNAL OF HYDROLOGY,592,13. |
| MLA | Tian, Chao,et al."Investigating the role of evaporation in dew formation under different climates using O-17-excess".JOURNAL OF HYDROLOGY 592(2021):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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