Patch size of trees affects its cooling effectiveness: A perspective from shading and transpiration processes
文献类型：期刊论文
| 作者 | Zhou, Weiqi; Zheng, Zhong; Wang, Jia; Qian, Yuguo; Jiao, Min |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2017-12-15 |
| 卷号 | 247期号:0页码:293-299 |
| 关键词 | Greenspace Patch Size Cooling Effect Humidification Effect Edge Effect Shading Transpiration |
| 英文摘要 | Increasing urban greenspace, particularly trees, has been widely recognized as an effective means for urban heat mitigation. Lots of uncertainty, however, occurs on how spatial configuration of trees affects their cooling effectiveness. A frequently asked question from urban planners is that whether a large greenspace patch has better cooling effects than several smaller ones, or vice versa. Here, we attempted to address this question by investigating the effects of patch size of trees on the two key cooling processes: shading and transpiration. We chose two typical tree species, Ginkgo biloba and Popubis tomentosa, with 4 different patch sizes, and conducted the research in Beijing. We integrated field measurements of air temperature, relative humidity and transpiration rate with model simulation, and conducted the analysis at both the patch and within-patch level. We found: (1) Smaller patches had higher temperature, lower humidity and greater within-patch variations in temperature and humidity than larger ones. (2) With a fixed area of tree cover, a number of small patches can provide more shade than a single large patch, suggesting a monotonic increase of shade provision with the division of a large patch into smaller ones. (3) There was a non-linear relationship between patch size and transpiration rate, suggesting a maximum transpiration rate might occur at certain patch size. By considering the joint effects of shading and transpiration, an optimal size of patch might occur, at which the joint effects of shading and transpiration are maximized. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39068]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhou, Weiqi,Zheng, Zhong,Wang, Jia,et al. Patch size of trees affects its cooling effectiveness: A perspective from shading and transpiration processes[J]. AGRICULTURAL AND FOREST METEOROLOGY,2017,247(0):293-299. |
| APA | Zhou, Weiqi,Zheng, Zhong,Wang, Jia,Qian, Yuguo,&Jiao, Min.(2017).Patch size of trees affects its cooling effectiveness: A perspective from shading and transpiration processes.AGRICULTURAL AND FOREST METEOROLOGY,247(0),293-299. |
| MLA | Zhou, Weiqi,et al."Patch size of trees affects its cooling effectiveness: A perspective from shading and transpiration processes".AGRICULTURAL AND FOREST METEOROLOGY 247.0(2017):293-299. |
入库方式： OAI收割
来源：生态环境研究中心
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