Journal Title
Title of Journal: Arab J Geosci
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Abbravation: Arabian Journal of Geosciences
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Publisher
Springer Berlin Heidelberg
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Authors: Qianlin Zhu Zhenbo Jiang
Publish Date: 2015/12/07
Volume: 9, Issue: 1, Pages: 2-
Abstract
Moisture sources for dew formation in soils can be classified into soil water and atmospheric water vapor Discriminating respective contribution of the two moisture sources is important for knowledge of water balance valuation Stable 2H and 18O of atmospheric water vapor are temporal variation thus they may be different to that in soil water which makes it feasible to discriminate moisture sources between soil water and atmospheric water vapor In this paper we took soil samples in the semiarid northern Chinese Loess Plateau and extracted the soil water using the hightemperature vacuum distillation method Stable isotope profiles and δDδ18O slopes of the soil water showed that the dew condensed from atmospheric water vapor occurred mainly in the upper 20 cm of the soil layer The atmospheric water vapor hardly influenced the soil water at 30cm depth and the deeper soil layer The significantly low deuterium excess of the soil water at the depth of 10 and 20 cm indicated that the dew in the soil underwent intensive evaporation after the dew formation
Keywords:
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