科研之友
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摘要
Increasingly "urban greening" is being implemented in order to meet goals of sustainability. Tree planting is part of these efforts that provide climate and environmental benefits. Albedo is an important factor in climatological and ecological functioning. Using GIS, this study assesses albedo changes of suburban communities resulting from trees. Based on orthophotos and LiDAR, a shading algorithm is used to examine how tree shading changes albedo throughout the year. For comparison, changes in community albedo were calculated with low and high assumptions for tree albedo. Under the low tree albedo assumption (0.14), community albedo was decreased (-0.07) by the effect of tree shading at all times modeled during the year. Using a high albedo for trees (0.20), the albedo changes were slight (<-0.01). This indicates the importance of considering the albedo of both the trees planted and the surfaces that are shaded when developing urban greening policies.
- 出版日期2013
