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DOI | 10.1088/1748-9326/aa7ee7 |
Evaluation of an urban canopy model in a tropical city: the role of tree evapotranspiration | |
Liu, Xuan1; Li, Xian-Xiang1; Harshan, Suraj2; Roth, Matthias2; Velasco, Erik1 | |
2017-09-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Singapore |
英文摘要 | A single layer urban canopy model (SLUCM) with enhanced hydrologic processes, is evaluated in a tropical city, Singapore. The evaluation was performed using an 11 month offline simulation with the coupled Noah land surface model/SLUCM over a compact low-rise residential area. Various hydrological processes are considered, including anthropogenic latent heat release, and evaporation from impervious urban facets. Results show that the prediction of energy fluxes, in particular latent heat flux, is improved when these processes were included. However, the simulated latent heat flux is still underestimated by similar to 40%. Considering Singapore's high green cover ratio, the tree evapotranspiration process is introduced into the model, which significantly improves the simulated latent heat flux. In particular, the systematic error of the model is greatly reduced, and becomes lower than the unsystematic error in some seasons. The effect of tree evapotranspiration on the urban surface energy balance is further demonstrated during an unusual dry spell. The present study demonstrates that even at sites with relatively low (11%) tree coverage, ignoring evapotranspiration from trees may cause serious underestimation of the latent heat flux and atmospheric humidity. The improved model is also transferable to other tropical or temperate regions to study the impact of tree evapotranspiration on urban climate. |
英文关键词 | energy balance hydrological urban canopy model tropical tree evapotranspiration |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410458700001 |
WOS关键词 | ENERGY-BALANCE ; LOCAL CLIMATE ; HEAT-ISLAND ; PART I ; VEGETATION ; SINGAPORE ; IMPACT ; PARAMETRIZATION ; TRANSPIRATION ; NEIGHBORHOODS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32089 |
专题 | 气候变化 |
作者单位 | 1.Singapore MIT Alliance Res & Technol, CENSAM, Singapore, Singapore; 2.Natl Univ Singapore, Dept Geog, Singapore, Singapore |
推荐引用方式 GB/T 7714 | Liu, Xuan,Li, Xian-Xiang,Harshan, Suraj,et al. Evaluation of an urban canopy model in a tropical city: the role of tree evapotranspiration[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(9). |
APA | Liu, Xuan,Li, Xian-Xiang,Harshan, Suraj,Roth, Matthias,&Velasco, Erik.(2017).Evaluation of an urban canopy model in a tropical city: the role of tree evapotranspiration.ENVIRONMENTAL RESEARCH LETTERS,12(9). |
MLA | Liu, Xuan,et al."Evaluation of an urban canopy model in a tropical city: the role of tree evapotranspiration".ENVIRONMENTAL RESEARCH LETTERS 12.9(2017). |
条目包含的文件 | 条目无相关文件。 |
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