The Cause of Decreased Pan Evaporation over the Past 50 Years
The Cause of Decreased Pan Evaporation over the Past 50 Years
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DOI：
10.1126/science.1075390-a
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发表时间：
2002-11
期刊：
影响因子：
56.9
通讯作者：
M. Roderick;G. Farquhar
中科院分区：
文献类型：
--
作者：
M. Roderick;G. Farquhar
全球水循环的变化可能造成重大的环境和社会经济影响。随着全球平均气温的上升，人们普遍预计空气将变得更加干燥，陆地水体的蒸发量将增加。矛盾的是，过去50年的地球观测却显示了相反的情况。在这里，我们表明，蒸发量的减少与人们对观察到的由于云层覆盖率和气溶胶浓度增加而导致的太阳光大范围减少的预期是一致的。
Changes in the global water cycle can cause major environmental and socioeconomic impacts. As the average global temperature increases, it is generally expected that the air will become drier and that evaporation from terrestrial water bodies will increase. Paradoxically, terrestrial observations over the past 50 years show the reverse. Here, we show that the decrease in evaporation is consistent with what one would expect from the observed large and widespread decreases in sunlight resulting from increasing cloud coverage and aerosol concentration.