Surface Warming and Atmospheric Circulation Dominate Rainfall Changes Over Tropical Rainforests Under Global Warming
Surface Warming and Atmospheric Circulation Dominate Rainfall Changes Over Tropical Rainforests Under Global Warming
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全球变暖下地表变暖和大气环流主导热带雨林降雨变化
DOI：
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发表时间：
2019
影响因子：
5.2
通讯作者：
M. Collins
中科院分区：
文献类型：
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作者：
M. Saint‐Lu;R. Chadwick;F. H. Lambert;M. Collins
本研究调查了三个主要雨林中CO2翻两番对植物生理影响降水的直接影响。我们表明，区域之间的差异在于陆面变暖（由蒸腾作用减少驱动）如何与气候大气环流相互作用，而不管它们对蒸散的依赖。使用了来自两个大气环流模式的各种大气实验。我们发现，在新几内亚，地表变暖放大了来自海洋的水分汇聚，增加了降雨。在刚果，由于降雨的迁移抵消了地表变暖的影响，因此没有出现明显的降雨变化。在亚马逊河流域，陆面变暖与气候环流模式的相互作用导致降水变化偶极子，亚马逊河流域中部和东部降雨减少，西部降雨增加。
This study investigates how the direct effects of CO2 quadrupling on plant physiology impact precipitation in three main rainforests. We show that differences between the regions lie in how land‐surface warming (driven by reduced transpiration) interacts with their climatological atmospheric circulations, regardless of their reliance on evapotranspiration. Various atmosphere‐only experiments from two General Circulation Models are used. We find that over New Guinea, land‐surface warming amplifies moisture convergence from the ocean and increases rainfall. In the Congo, no clear rainfall changes emerge as the land‐surface warming effect is offset by migrations of rainfall. In Amazonia, the interaction of land‐surface warming with the climatological circulation pattern leads to a precipitation‐change dipole, with reduced rainfall in central and eastern Amazonia and increased rainfall in the west.