蒸散量
构造盆地
水文学(农业)
高原(数学)
降水
流域
环境科学
蒸发皿
地质学
自然地理学
地貌学
地理
生态学
数学分析
岩土工程
数学
地图学
气象学
生物
作者
Liuming Wang,Junxiao Wang,Lachun Wang,Qingfeng Ma,Xingong Li
摘要
Abstract Effects of lake evaporation ( E W ) on basin evapotranspiration ( ET B ) and lake water storage change ( LWSC ) at lake‐basin scale have never been reported for most basins on the inner Tibetan Plateau (IB). In this study, E W of 118 large lakes in 95 closed lake‐basins were estimated, and its effects on ET B and LWSC over 2001–2018 were examined using a derivative‐guided framework from the aspects of E W amount, rate, trend slope and inter‐annual variability. We found that E W amount has a high effect (17%) on regional ET B amount compared to the average lake area ratio ( α ) (∼5%), and the effect has increased significantly (2%/10 a). The spatial pattern of the effect is mainly controlled by α , and the increasing trend of α (0.6%/10 a) also dominated the increasing trend in regional ET B rate (0.30 mm/a) though with large spatial heterogeneity. Variance in α and E W rate have a minor effect (∼3%) on ET B variance, especially for the basins with lower α . The combination of quasi lake inflow ( R L , 41%) and lake surface precipitation ( P W , 16%) offset the depletion of E W (−43%), resulting in the surplus of regional lake water ( LWSC > 0). The increase in E W mount, which is mainly from lake area expansion (90%), caused a decreasing trend in LWSC (i.e., slower growth rate) with a contribution of −59%. This suggests a negative feedback between lake area expansion and E W amount in the IB, and the feedback may continue with the predicted area increases.
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