| 基于多源融合资料分析北京一次超强城市热岛三维结构特征 |
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| 引用本文： | 陈耀登,陈逸炜,郭建侠,王佳,刘德强.基于多源融合资料分析北京一次超强城市热岛三维结构特征[J].气象科技,2023,51(5):715-727. |
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| 作者姓名： | 陈耀登 陈逸炜 郭建侠 王佳 刘德强 |
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| 作者单位： | 南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心，南京 210044;中国气象局气象探测中心，北京 100081;福建省气象台，福州 350025 |
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| 基金项目： | 国家重点研发计划项目（2022YFC3004101）资助 |
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| 摘 要： | 城市热岛效应是人类活动对大气系统影响的最主要体现之一。本文利用（Space and Time Multiscale Analysis System，STMAS）时空多尺度分析系统，融合了地面自动站、雷达、卫星等多源高时空分辨率观测资料，建立了城市热岛三维数据集。并在此基础上统计了2021年北京夏季的城市热岛强度变化特征，选取其中一次超强城市热岛个例（2021年6月11—12日）详细分析了其三维精细化结构特征。结果表明：①本个例中，夜间郊区近地面迅速降温，形成逆温层；而城市近地面降温缓慢，使得近地面城郊温差不断增大。②本次超强城市热岛三维温度场暖心结构在地面和990 hPa以下低空等压面清晰可见，风场距平呈现气旋性环流特征并在低空从郊区向城区辐合，引起可到达中高空的上升运动，说明城市热岛效应有增强垂直环流的作用。
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| 关 键 词： | 城市热岛 精细化结构 三维特征 多源观测资料 |
| 收稿时间： | 2022/9/5 0:00:00 |
| 修稿时间： | 2023/5/4 0:00:00 |
3D Fine Structure Characteristics of an Ultrastrong Urban Heat Island in Beijing Based on Multi-Source Fusion Data |
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| CHEN Yaodeng,CHEN Yiwei,GUO Jianxi,WANG Ji,LIU Deqiang.3D Fine Structure Characteristics of an Ultrastrong Urban Heat Island in Beijing Based on Multi-Source Fusion Data[J].Meteorological Science and Technology,2023,51(5):715-727. |
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| Authors: | CHEN Yaodeng CHEN Yiwei GUO Jianxi WANG Ji LIU Deqiang |
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| Institution: | Key Laboratory of Meteorological Disaster, Ministry of Education/International Joint Laboratory on Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044;Meteorological Observation Centre, CMA, Beijing 100081; Fujian Meteorological Observatory, Fuzhou 350025 |
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| Abstract: | The urban heat island effect is one of the primary manifestations of the impact of human activities on the atmospheric system. In this paper, the Space and Time Multiscale Analysis System (STMAS) is used to fuse multi-source high spatial and temporal resolution observations from automatic ground stations, radars, satellites and other sources, and establish a three-dimensional data set of urban heat island. Moreover, on this basis, the characteristics of the intensity change of Beijing urban heat island are statistically analyzed, and a case of an ultrastrong urban heat island (June 11-12, 2021) is selected to analyze its three-dimensional fine structure characteristics in detail. The results show that: (1) In the case of the heat island, the suburban near-surfaces cooled rapidly at night, forming an inversion layer, while the temperature of the urban near-surface decreased slowly, which made the temperature difference between suburban and urban near-surface increased continuously. (2) The warm core structure of the three-dimensional temperature field of this ultrastrong urban heat island was clearly visible in the isobaric surface on the ground and near ground isobaric surfaces below 990 hPa. The wind field anomaly showed the characteristics of cyclonic circulation. It converged from suburb to urban area at low height, causing upward movement that could reach middle and high heights, indicating that the urban heat island effect could enhance the vertical circulation. |
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| Keywords: | urban heat island fine structure three-dimensional characteristic multi-source observation data |
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