城市冠层模式发展及其在城市化气候效应研究中的应用

It has been becoming a research hotspot that how the urbanization affects the land surface processing and local weather/climate in and around the urban area, especially in the context of global climate change and China’s Urbanization at present. As a extension of previous research of the applicant, an urban canopy model is planned to be accomplished including anthropogenic heat module, urban canopy heat storage module and hydrology module. A series of dataset of observation and statistic will be used to calibrate the parameters in the urban canopy model. The completed model will be coupled with Region Climate Models to perform several sets of numerical experiments to simulate the circulation structures of atmospheric boundary layer and disastrous weather processing occurred over the area of Great Beijing Area, which is one of the main urban areas in China. The results will show us the climate effects of urbanization in the area. This research can help improve the accuracy of the weather forecasting in urban region. Besides, it would also give advises to China’s government for the scientific policy-making on the urban planning in the future.

城市化对区域陆面过程，区域天气和气候的影响，是当前全球气候变化和中国大规模快速城镇化双重背景下的热点研究问题之一。本项目作为申请人对以往工作的延续，拟在已初步完成的简单城市冠层模式的基础上，进一步完善城市人为热过程、城市冠层内热储存过程和城市水文过程等陆面物理过程，并利用多种观测资料和统计数据对模式中各个关键参数进行订正，最终整合完成一套可与区域大气模式耦合运行的城市冠层模式。进一步应用该模式进行城市化对中国京津冀地区的大气边界层环流结构和灾害性天气过程的数值敏感性实验，分析探讨城市化对城市区域天气和气候特征的影响。研究结果为进一步提高城市数值天气预报精度提供技术基础，为探讨城市化对天气和气候的影响提供理论依据，为未来中国城镇化过程中的政府规划决策提供科学依据。