首页|Changes of Terrestrial Water Storage in the Yellow River Basin Under Global Warming
Changes of Terrestrial Water Storage in the Yellow River Basin Under Global Warming
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The increasing temperature in the Yellow River Basin has led to a rapid rise in the melting level height,at a rate of 5.98 m yr-1 during the cold season,which further contributes to the transition from snowfall to rainfall patterns.Between 1979 and 2020,there has been a decrease in snowfall in the Yellow River Basin at a rate of-3.03 mm dec-1,while rainfall has been increasing at a rate of 1.00 mm dec-1.Consequently,the snowfall-to-rainfall ratio(SRR)has decreased.Snowfall directly replenishes terrestrial water storage(TWS)in solid form until it melts,while rainfall is rapidly lost through runoff and evaporation,in addition to infiltrating underground or remaining on the surface.Therefore,the decreasing SRR accelerates the depletion of water resources.According to the surface water balance equation,the reduction in precipitation and runoff,along with an increase in evaporation,results in a decrease in TWS during the cold season within the Yellow River Basin.In addition to climate change,human activities,considering the region's dense population and extensive agricultural land,also accelerate the decline of TWS.Notably,irrigation accounts for the largest proportion of water withdrawals in the Yellow River Basin(71.8％)and primarily occurs during the warm season(especially from June to August).The impact of human activities and climate change on the water cycle requires further in-depth research.
terrestrial water storagemelting level heightsurface water balancehuman activitiesYellow River Basin
曾昕瑞、管晓丹、陈涵、魏志敏、王国栋
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Collaborative Innovation Center for Western Ecological Safety,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000 China
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