Identifying water vapor sources of precipitation in forest and grassland in the north slope of the Tianshan Mountains,Central Asia |
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| Authors: | CHEN Haiyan |
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| Institution: | 1.College of Geography and Environmental Science, Hainan Normal University, Haikou 571158, China;2.Key Laboratory of Earth Surface Processes and Environmental Change of Tropical Islands, Hainan Province, Haikou 571158, China;3.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;4.Xinjiang Normal University, Urumqi 830013, China |
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| Abstract: | Identifying water vapor sources in the natural vegetation of the Tianshan Mountains is of significant importance for obtaining greater knowledge about the water cycle, forecasting water resource changes, and dealing with the adverse effects of climate change. In this study, we identified water vapor sources of precipitation and evaluated their effects on precipitation stable isotopes in the north slope of the Tianshan Mountains, China. By utilizing the temporal and spatial distributions of precipitation stable isotopes in the forest and grassland regions, Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model, and isotope mass balance model, we obtained the following results. (1) The Eurasia, Black Sea, and Caspian Sea are the major sources of water vapor. (2) The contribution of surface evaporation to precipitation in forests is lower than that in the grasslands (except in spring), while the contribution of plant transpiration to precipitation in forests (5.35%) is higher than that in grasslands (3.79%) in summer. (3) The underlying surface and temperature are the main factors that affect the contribution of recycled water vapor to precipitation; meanwhile, the effects of water vapor sources of precipitation on precipitation stable isotopes are counteracted by other environmental factors. Overall, this work will prove beneficial in quantifying the effect of climate change on local water cycles. |
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| Keywords: | Tianshan Mountains Manas River Basin water vapor sources of precipitation land cover precipitation stable isotopes Hybrid Single-Particle Lagrangian Integrated Trajectory |
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