Revisiting Biophysical Impacts of Greening on Precipitation Over the Loess Plateau of China Using WRF With Water Vapor Tracers
Revisiting Biophysical Impacts of Greening on Precipitation Over the Loess Plateau of China Using WRF With Water Vapor Tracers
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DOI：
10.1029/2023gl102809
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发表时间：
2023-04
影响因子：
5.2
通讯作者：
Yu Liu;Jun Ge;W. Guo;Yipeng Cao;Chaorong Chen;X. Luo;Limei Yang;Shiyao Wang
中科院分区：
文献类型：
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作者：
Yu Liu;Jun Ge;W. Guo;Yipeng Cao;Chaorong Chen;X. Luo;Limei Yang;Shiyao Wang
近几十年来，由于植被恢复，中国黄土高原出现了显著的绿化趋势。然而，降水对绿化的响应仍然不清楚，绿化的水文效应存在争议。在这里，我们重新审视了2002-2015年期间绿化对高原降水的生物物理影响，使用了嵌入区域耦合模型中的最先进的水蒸气示踪剂。结果表明，绿化可以增加生长季降水量（0.45 mm·d-1），其中15%和85%的降水增量分别来自于当地蒸散量和高原外水汽输入量的增加。因此，增加的降水量可以补偿由于蒸散量增加而造成的陆地水分损失，从而使产水量略有增加。这项研究突出了在该地区的绿化降水响应的非本地效应的主导作用。
The Loess Plateau of China has witnessed a remarkable greening trend due to vegetation restoration in recent decades. However, the precipitation response to greening remains unclear, and the hydrological effect of greening is controversial. Here, we revisited biophysical effects of greening on precipitation over the plateau during 2002–2015 using the state‐of‐the‐art water vapor tracer embedded in a regional coupled model. We find that greening can promote the growing season precipitation (0.45 mm·day−1), with 15% and 85% of the precipitation increment resulting from increases in the local evapotranspiration and the water vapor inflow from outside the plateau, respectively. As a consequence, the enhanced precipitation can compensate for the terrestrial water loss driven by the increased evapotranspiration, leading to a slight increase in the water yield. This study highlights the dominant role of the nonlocal effect in precipitation responses to greening in this region.