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DOI | 10.1029/2018WR023159 |
Investigation of Kinetic Isotopic Fractionation of Water During Bare Soil Evaporation | |
Quade, Maria; Brueggemann, Nicolas; Graf, Alexander; Vanderborght, Jan; Vereecken, Harry; Rothfuss, Youri | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:6909-6928 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | The kinetic fractionation factor (alpha(K)) controls to a large extent the isotopic enrichment of surface waters during evaporation (E). In contrast to the well-known vapor-to-liquid isotopic equilibrium fractionation factor, alpha(K) has still not yet been properly characterized for soil water evaporation. In this study, we investigated the alpha(K) daily dynamics during a series of three laboratory experiments differing in soil water availability and aerodynamic conditions. For this, we applied a commonly used isotopic evaporation model and tested it in two different approaches. First, a two-end-member mixing model (Keeling plot) was fitted to the measured isotopic composition of the laboratory air water vapor to obtain alpha(K). In a second approach, alpha(K) was obtained from the slope of the evaporation line in a dual isotopic coordinate system. For both methods, the isotopic composition of the soil water was determined nondestructively and online by sampling the soil water vapor with gas-permeable microporous tubing. Results highlighted the limitation of the first approach, as the determination of the isotopic composition of E with the Keeling plot was challenging with the laboratory setup. The second approach provided alpha(K) values within the range (alpha(2H)(K) = 1.0132 +/- 0.0013; alpha(18o)(K) = 1.0149 +/- 0.0012) reported in the literature and pointed to the prevalence of turbulent water vapor transport under water-saturated soil conditions but also at soil water content significantly lower than the saturated value. In a third experiment, temporal dynamics of the atmospheric water vapor intrusion in the topmost soil layer could be observed during an isotopic labeling pulse. |
英文关键词 | soil evaporation kinetic isotopic fractionation factor semicontrolled conditions |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100059 |
WOS关键词 | PARTITIONING EVAPOTRANSPIRATION ; HYDRAULIC CONDUCTIVITY ; VACUUM EXTRACTION ; STABLE-ISOTOPES ; O-18 ; CALIBRATION ; DEUTERIUM ; SYSTEM ; OXYGEN ; MODEL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21845 |
专题 | 资源环境科学 |
作者单位 | Forschungszentrum Julich, Inst Bio & Geosci, Agrosphere Inst IBG 3, Julich, Germany |
推荐引用方式 GB/T 7714 | Quade, Maria,Brueggemann, Nicolas,Graf, Alexander,et al. Investigation of Kinetic Isotopic Fractionation of Water During Bare Soil Evaporation[J]. WATER RESOURCES RESEARCH,2018,54(9):6909-6928. |
APA | Quade, Maria,Brueggemann, Nicolas,Graf, Alexander,Vanderborght, Jan,Vereecken, Harry,&Rothfuss, Youri.(2018).Investigation of Kinetic Isotopic Fractionation of Water During Bare Soil Evaporation.WATER RESOURCES RESEARCH,54(9),6909-6928. |
MLA | Quade, Maria,et al."Investigation of Kinetic Isotopic Fractionation of Water During Bare Soil Evaporation".WATER RESOURCES RESEARCH 54.9(2018):6909-6928. |
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