Polytechnic University of Bari, Via E. Orabona 4, 70125 Bari, Italy.
Environ Pollut. 2011 Aug-Sep;159(8-9):2119-26. doi: 10.1016/j.envpol.2011.03.007. Epub 2011 Apr 8.
This paper attempts to evaluate the positive effects of vegetation with a multi-scale approach: an urban and a building scale. Monitoring the urban heat island in four areas of New York City, we have found an average of 2 °C difference of temperatures between the most and the least vegetated areas, ascribable to the substitution of vegetation with man-made building materials. At micro-scale, we have assessed the effect of surface albedo on climate through the use of a climatological model. Then, using the CO(2) equivalents as indicators of the impact on climate, we have compared the surface albedo, and the construction, replacement and use phase of a black, a white and a green roof. By our analyses, we found that both the white and the green roofs are less impactive than the black one; with the thermal resistance, the biological activity of plants and the surface albedo playing a crucial role.
城市尺度和建筑尺度。通过监测纽约市四个地区的城市热岛，我们发现最植被和最无植被地区之间的平均温度差异为 2°C，这归因于植被被人造建筑材料所取代。在微观尺度上，我们通过气候模型评估了地表反照率对气候的影响。然后，我们使用 CO(2)当量作为对气候影响的指标，比较了黑色、白色和绿色屋顶的表面反照率以及它们的建造、更换和使用阶段。通过我们的分析，我们发现白色和绿色屋顶的影响都小于黑色屋顶；热阻、植物的生物活性和表面反照率起着至关重要的作用。
