Abstract
Global warming accelerates water cycle with features of regional difference. However, little is known about the physical mechanism behind the phenomenon. To reveal the links between water cycle and climatic environment, we analyzed the changes of water cycle elements and their relationships with climatic and environmental factors. We found that when global warming was significant during the period of 1986-2003, the precipitation in Tarim mountains as well as Xinjiang increased rapidly except for Tarim plains, which indicated that there existed a signal of acceleration for water cycle in Xinjiang. The speed of water cycle is mainly affected by altitude, latitude, longitude, slope direction, and the most fundamental element is temperature. Moreover, according to Clausius-Kela Bai Lung relation, we found that the climate change induced the increase of temperature and accelerated the local water cycle only for the wet places. Our results provide a possible physical mechanisms of water cycle and thus well link the climate change to water circulation.
Highlights
Water moves through the land and air, and impacts the ecological and biological systems [1,2,3,4,5,6]
We found that when global warming was significant during the period of 1986-2003, the precipitation in Tarim mountains as well as Xinjiang increased rapidly except for Tarim plains, which indicated that there existed a signal of acceleration for water cycle in Xinjiang
Water vapor revenue over TRB increased at the speed of about 4.79 × 1012 kg per year from 1960 to 1986 and decreased at around 1.90 × 1013 kg per year from 1986 to 2003, and precipitation in TRB plains decreased at a rate of about 1.37 mm per year, but precipitation in TRB mountains increased at a rate of about 1.63 mm per year after 1986 during the same period. It indicated that other factors rather than water vapour net input (WVNI) accelerated the speed of water cycle in Xinjiang
Summary
Water moves through the land and air, and impacts the ecological and biological systems [1,2,3,4,5,6]. The circulation mechanism in the water cycle include evaporation, transportation, condensation, precipitation, runoff and groundwater [1], and each of these components has its unique role [7,8,9,10,11,12]. The water cycle begins with the evaporation of the water in rivers, lakes and oceans and water turns into water vapor. The water condenses into clouds when it encounters the cold air. When enough water vapor condenses into the clouds, it will turn into either liquid water or ice. it falls back to the ground through precipitation, which will eventually evaporate again
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