Observational evidence for cloud cover enhancement over western European forests.
Observational evidence for cloud cover enhancement over western European forests.
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云的观察证据涵盖了西欧森林的增强。
DOI：
10.1038/ncomms14065
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发表时间：
2017-01-11
影响因子：
16.6
通讯作者：
de Arellano JV
中科院分区：
文献类型：
--
作者：
Teuling AJ;Taylor CM;Meirink JF;Melsen LA;Miralles DG;van Heerwaarden CC;Vautard R;Stegehuis AI;Nabuurs GJ;de Arellano JV
森林通过调节水和热通量直接影响区域水文和气候。通过云形成和降水产生的间接影响对于促进大陆尺度的水分循环可能很重要，但在区域尺度上却知之甚少。特别是，温带森林对云层的影响在很大程度上是未知的。在这里，我们基于对地球同步卫星10年来15 最小分辨率数据的分析，提供了西欧大片林区云量显著增加的观测证据。此外，我们还表明，气旋克劳斯在兰德斯森林中的广泛吹袭导致了随后几年当地云量的显著减少。较大林区顺风边缘的强云发展与林风中尺度环流相一致。我们的结果强调，在评估温带森林的水和气候服务时，特别是在人口稠密地区周围，需要考虑对云形成的影响。森林影响大陆尺度的水分循环，但它们对区域尺度云层的影响鲜为人知。在这里，利用卫星观测，Teuling等人。说明由于建立了森林微风环流，西欧区域森林地区的云量增加。
Forests impact regional hydrology and climate directly by regulating water and heat fluxes. Indirect effects through cloud formation and precipitation can be important in facilitating continental-scale moisture recycling but are poorly understood at regional scales. In particular, the impact of temperate forest on clouds is largely unknown. Here we provide observational evidence for a strong increase in cloud cover over large forest regions in western Europe based on analysis of 10 years of 15 min resolution data from geostationary satellites. In addition, we show that widespread windthrow by cyclone Klaus in the Landes forest led to a significant decrease in local cloud cover in subsequent years. Strong cloud development along the downwind edges of larger forest areas are consistent with a forest-breeze mesoscale circulation. Our results highlight the need to include impacts on cloud formation when evaluating the water and climate services of temperate forests, in particular around densely populated areas. Forests impact continental-scale moisture recycling, but their impact on regional-scale cloud cover is little known. Here, using satellite observations, Teuling et al. illustrate enhanced cloud cover over regional forested areas in western Europe due to the establishment of a forest-breeze circulation.