Scaling,optimisation,and application of vegetation canopy radiative transfer model at microclimate scale  

作　　者：Junru Yan Lihua Zhao Xiufeng Sun Huihui Zhao Haichao Zheng Yu Wang 

机构地区：[1]Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River(Ministry of Education),College of Horticulture and Landscape Architecture,Southwest University,Chongqing 400715,China [2]State Key Laboratory of Subtropical Building and Urban Science,School of Architecture,South China University of Technology,Guangzhou 510640,China [3]School of Architecture and Urban Planning,Shandong Jianzhu University,Jinan 250100,China [4]School of Advanced Agriculture and Bioengineering,Yangtze Normal University,Chongqing 408100,China

出　　处：《Building Simulation》2024年第10期1805-1821,共17页建筑模拟（英文）

基　　金：supported by the Natural Science Foundation of Chongqing(No.2024NSCQ-MSX3704);Youth Project of Science and Technology Research Program of Chongqing Education Commission of China(Project No.KJQN202101418);Fundamental Research Funds for the Central Universities(Project No.SWU-KQ24027).

摘　　要：Urban greenery is widely recognised as a strategy to mitigate urban overheating,and its shading capacity is crucial for improving microclimate and thermal comfort.Nevertheless,research on modelling the vegetation canopy radiation transfer(VCRT)process for the microscale is lacking,and most existing VCRT models are taken out from mesoscale models.In this study,we used canopy morphology and structure as an entry point to construct a VCRT model for the microscale,from the mesoscale model.Firstly,100 m and 1000 m were defined as the critical scales by scaling,and the effect of leaf distribution on VCRT was analysed.The VCRT model was made applicable to the microscale by introducing a scattered radiation source term and 6 leaf inclination distribution(LID)functions,and the results showed that the proposed model could improve the accuracy of canopy radiation absorptivity by about 11%.In addition,both leaf area index(LAI)and LID had significant effects on VCRT,and vegetation with LAI above 2 and spreading leaves had better shading effects.It is worth noting that urban greenery has an exciting potential for thermal comfort improvement,with the potential to regulate even extremely hot weather from near"very hot"(148 W/m^(2))to almost"comfortable"(69 W/m^(2)).This study is a catalyst for improving the predictability of the VCRT process for microclimate and thermal comfort,providing theoretical support and implications for mitigating urban overheating and enhancing urban thermal resilience.

关 键 词：vegetation canopy radiative transfer SCALING MICROCLIMATE thermal comfort 

分 类 号：P46[天文地球—大气科学及气象学]