【绿化与地表温度】Shu-Shi Penga Shilong Piaoab1 Zhenzhong Zenga Philippe Ciaisc Liming Zhoud Laurent Z. X. Lie Ranga B. Mynenif Yi Yina and Hui Zengg. Afforestation in China cools local land surface temperature. PNAS 2915–2919 doi: 10.1073-pnas.1315126111
Abstract
China has the largest afforested area in the world (∼62 million hectares in 2008) and these forests are carbon sinks. The climatic effect of these new forests depends on how radiant and turbulent energy fluxes over these plantations modify surface temperature. For instance a lower albedo may cause warming which negates the climatic benefits of carbon sequestration. Here we used satellite measurements of land surface temperature (LST) from planted forests and adjacent grasslands or croplands in China to understand how afforestation affects LST. Afforestation is found to decrease daytime LST by about 1.1 ± 0.5 °C