模式分辨率对珠三角局地污染扩散影响的数值模拟

南京大学学报(自然科学版) ›› 2014, Vol. 50 ›› Issue (6): 838–846.

模式分辨率对珠三角局地污染扩散影响的数值模拟

曾莉萍1,2 吴小卫3* 罗乃兴4 林文实1 樊琦1 冯业荣5

出版日期:2014-11-11 发布日期:2014-11-11
作者简介:(1. 中山大学环境科学与工程学院,广州,510275 2. 贵州省气象局,贵阳,550002 3. 华南理工大学建筑设计研究院,广州,510641 4. 贵阳市气象局贵阳,550001 5. 中国气象局广州热带海洋气象研究所/广东省区域数值天气预报重点实验室,广东广州 510080)
基金资助:
国家重点基础研究发展规划（973）项目（2010CB428504），国家自然科学基金（41275145），中央高校基本科研业务费专项资金资助（13lgjc03）,高等学校博士学科点专项科研基金（20130171110027）2014-03-XX

A numerical simulation about model resolution affects local pollution diffusion in the Pearl River Delta

Zeng Liping1,2, Wu Xiaowei3* Lin Wenshi1, Luo Naixing3, Fan Qi1, Feng Yerong4

Online:2014-11-11 Published:2014-11-11
About author:(1. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275 2. Guizhou Meteorological Bureau, Guiyang 550002 (973)(2010CB428504)(41275145)(13lgjc03),(20130171110027) *, Emailwxw7133@126.com 3. Architecture Design and Research Institute, South China University of Technology Guangzhou 510641 4. Guiyang Bureau of Meteorology, Guiyang 550001 5. Guangdong Provincial Key Laboratory of Regional Numerical Weather PredictionCMAGuangzhou 510080)

摘要/Abstract

摘要： 随着工业化发展，近十年来珠江三角洲地区空气质量有恶化的趋势。在冷锋过境前常常由于地面受低压控制，近地面出现静小风的情况导致污染物在这一区域的滞留加剧。本文选取这样的天气背景来模拟珠江三角洲地区的环流形势和污染物扩散,模拟试验应用加入扩散方程的MM5模式进行。模式模拟时间（北京时）从2008年10月21日08时到2008年10月23日08时。共设计两个模拟试验，控制试验和敏感性试验。两个试验中置入污染点源资料，包含珠三角地区的3179个污染点源的源高和源强。两个试验的区别在于设计了不同的区域网格距，控制试验最细2km，而敏感性试验最细1km。模拟结果表明提高模式分辨率主要明显优化风场的模拟效果，而气象要素模拟效果的提高又间接影响着污染物的传输与扩散。综合各方面因素说明高精度的分辨率是有利于提高模式模拟效果的。

Abstract: In the latest ten years, along with industrialization the air quality of the Pearl River Delta (PRD ) became more and more worse. Before cold front the surface is controlled by the low pressure, which causes small wind near the ground and air pollutants accumulation. In this paper, the weather environment before cold front was simulated by the MM5 that a diffusion equation was added to model the air circulation and air pollutants diffusion in the PRD. The simulation time is 48 hours from 21/10/2008 08:00 to 23/10/2008 08:00 (the Beijing local solar time). There were 3179 pollution point sources including the height and the intensity of pollution source taken into consider in the finer domain. Two simulation experiments were conduct, the control experiment use the fine mesh scale 2km, the sensitive experiment is 1km. The simulation results show that optimized simulated results of wind fields when the model resolution is changed to be fine. The simulated results displayed that the high resolution mesh scale is in favor of improving simulated results

曾莉萍1,2 吴小卫3* 罗乃兴4 林文实1 樊琦1 冯业荣5. 模式分辨率对珠三角局地污染扩散影响的数值模拟[J]. 南京大学学报(自然科学版), 2014, 50(6): 838–846.

Zeng Liping1,2, Wu Xiaowei3* Lin Wenshi1, Luo Naixing3, Fan Qi1, Feng Yerong4. A numerical simulation about model resolution affects local pollution diffusion in the Pearl River Delta[J]. Journal of Nanjing University(Natural Sciences), 2014, 50(6): 838–846.

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