王圣杰|西北师范大学分享 http://blog.sciencenet.cn/u/Z2112132 新疆天山降水同位素 Stable Water Isotopes in Arid Central Asia

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[转载]Water:基于氢氧稳定同位素的祁连山山区植物用水策略

已有 384 次阅读 2019-4-17 23:17 |个人分类:兰州同位素网络|系统分类:论文交流|文章来源:转载

Xue Qiu, Mingjun Zhang*, Shengjie Wang, Athanassios A. Argiriou, Rong Chen, Hongfei Meng, Rong Guo. Water stable isotopes in an alpine setting of the northeastern Tibetan Plateau. Water, 2019, 11: 770. DOI: 10.3390/w11040770.


Hydrological processes produce effects on water resources in inland mountainous regions. To perform a comprehensive investigation of the important segments of the water cycle, using the Qilian Mountains as a case study, precipitation, soil, plant, river, and groundwater were collected during the plant growing season of 2016. All samples were collected on a monthly basis, except precipitation, which was collected on a per event basis. The results showed that: the “temperature effect” was apparent, which suggested a drier climate background; there were differences in the slope and intercept of the local meteoric water line, using different regression methods; and the δ18O of soil water varied greatly in the topsoil, tended to be similar in the deep soil, and became increasingly depleted as the soil depth increased. The responses of the soil water isotopes to precipitation pulses had different boundaries. The major water source for Caragana Fabr. in no-precipitation month was located in the 0–30 cm soil layer, but was different in months when precipitation occurred. Overall, the findings from the stable isotopes provide insights into hydrological processes and offer a platform to understand mountainous water cycle in arid areas.




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