Potential and Actual impacts of deforestation and afforestation on land surface temperature

摘要: Forests are undergoing significant changes throughout the globe. These can modify water, energy and carbon balance of land surface, which ultimately affect climate. We utilize satellite data to quantify potential actual impacts forest change on surface temperature (LST) from 2003 2013. The effect is calculated by LST difference between nearby non-forest land, whereas impact quantified trend deforested (afforested) unchanged (non-forest land) over several years. good agreement found both at annual seasonal levels indicates that have detectable trends. That impact, however, different for maximum minimum temperatures. Overall, deforestation caused a warming up 0.28 K/decade average trends in tropical regions, cooling -0.55 K/decade boreal weak northern temperate strong (up 0.32 K/decade) southern regions. Afforestation induced an opposite magnitude estimated depends threshold dataset (MODIS Landsat) cover defined. Such latitudinal pattern mainly competing effects albedo evapotranspiration temperature. methodology developed here be used evaluate around