Spatial variability of global lake evaporation regulated by vertical vapor pressure difference
Spatial variability of global lake evaporation regulated by vertical vapor pressure difference
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DOI：
10.1088/1748-9326/ac614b
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发表时间：
2022-03
影响因子：
6.7
通讯作者：
Umar Farooq;Heping Liu;Qianyu Zhang;Yulong Ma;Jingfeng Wang;Lian Shen
中科院分区：
文献类型：
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作者：
Umar Farooq;Heping Liu;Qianyu Zhang;Yulong Ma;Jingfeng Wang;Lian Shen
全球约3亿个湖泊的蒸发量（E）在没有植物生理约束的情况下直接反映了水文对大气强迫的响应。然而，它仍然没有充分了解是什么调节全球湖E跨季节的空间变异。在这里，我们表明，垂直水汽压差（艾德）占66%的空间变异的年度E，其次是风速（16%）。艾德也是调节E日变化的主要因素，并导致夜间E大于白天。因此，夜间E的空间变化强烈地调节着全球E的季节变化。因此，所观察到的广泛的，异质性的变化，湖泊表面温度，这意味着在艾德的空间变异可能有助于全球E变率的变化。
Evaporation (E) from about 300 million lakes worldwide without plant physiological constraints directly reflects hydrological response to atmospheric forcings. However, it remains inadequately understood about what regulate spatial variability of global lake E across seasons. Here we show that vertical vapor pressure difference ( eD ) accounts for 66% of the spatial variability of annual E, followed by wind speed (16%). The eD is also the predominant factor modulating diurnal variability in E and causing greater E at night than during the daytime. As a consequence, spatial variability in nighttime E strongly regulates that in global E across seasons. Therefore, the observed widespread, heterogeneous changes in lake surface temperature that imply spatial variability in eD may have contributed to changes in global E variability.