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| 001 | 852670 | ||
| 005 | 20210129235153.0 | ||
| 024 | 7 | _ | |a 10.1029/2018WR023159 |2 doi |
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| 037 | _ | _ | |a FZJ-2018-05543 |
| 082 | _ | _ | |a 550 |
| 100 | 1 | _ | |a Quade, Maria |0 P:(DE-Juel1)167345 |b 0 |
| 245 | _ | _ | |a Investigation of Kinetic Isotopic Fractionation of Water During Bare Soil Evaporation |
| 260 | _ | _ | |a [New York] |c 2018 |b Wiley |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The kinetic fractionation factor (αK) 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, αK has still not yet been properly characterized for soil water evaporation. In this study, we investigated the αK 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 αK. In a second approach, αK 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 non-destructively 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 αK values within the range (α_K^(2_H ) = 1.0132 ±0.0013; α_K^(〖18〗_O ) = 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. |
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| 700 | 1 | _ | |a Brüggemann, Nicolas |0 P:(DE-Juel1)142357 |b 1 |u fzj |
| 700 | 1 | _ | |a Graf, Alexander |0 P:(DE-Juel1)129461 |b 2 |
| 700 | 1 | _ | |a Vanderborght, Jan |0 P:(DE-Juel1)129548 |b 3 |
| 700 | 1 | _ | |a Vereecken, Harry |0 P:(DE-Juel1)129549 |b 4 |
| 700 | 1 | _ | |a Rothfuss, Youri |0 P:(DE-Juel1)145658 |b 5 |e Corresponding author |
| 773 | _ | _ | |a 10.1029/2018WR023159 |0 PERI:(DE-600)2029553-4 |n 9 |p 6909-6928 |t Water resources research |v 54 |y 2018 |x 0043-1397 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/852670/files/Quade_et_al-2018-Water_Resources_Research.pdf |y Restricted |
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| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/852670/files/manuscript_alphaK_revised_final.pdf |y OpenAccess |
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