| 城市环境对重气扩散的影响及其验证 |
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| 引用本文： | 黄江平,王喜全,王自发.城市环境对重气扩散的影响及其验证[J].气候与环境研究,2012,17(3):274-280. |
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| 作者姓名： | 黄江平 王喜全 王自发 |
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| 作者单位： | 1. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点试验室,北京100083;中国科学院研究生院,北京100049;航空气象研究所,北京100085
2. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点试验室,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划项目《重点城市群大气复合污染物综合防治技术集成示范》 |
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| 摘 要： | 开发了适合城市环境下的应急重气扩散模型——SLAB_URBAN模型,该模型能够对城市环境下重气的传输扩散过程进行模拟。模型的原理基于重气扩散浅层理论,采用了新的城市边界层和扩散参数的参数化方案。该方案考虑了城市冠层内特有的风和湍流扩散的特征,能够体现城市边界层和湍流对重气扩散的影响。对美国盐湖城Urban2000的城市扩散试验进行模拟,主要验证下风方向观测弧所观测到的气体最大小时平均浓度与源释放速率的比值。结果表明,模型能够比较好地模拟出下风方向上浓度的分布特征。另外,与国外同类城市扩散模型的比较来看,SLAB_URBAN模型的模拟能力居于前列。
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| 关 键 词： | 重气扩散模型 模拟验证 应急模型 城市气象 |
| 收稿时间： | 2010/7/26 0:00:00 |
| 修稿时间： | 2012/1/18 0:00:00 |
The Effect of Urban Condition on Denser-than-Air Gas Dispersion and Its Validation |
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| HUANG Jiangping,WANG Xiquan and WANG Zifa.The Effect of Urban Condition on Denser-than-Air Gas Dispersion and Its Validation[J].Climatic and Environmental Research,2012,17(3):274-280. |
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| Authors: | HUANG Jiangping WANG Xiquan and WANG Zifa |
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| Institution: | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100083;Graduate University of Chinese Academy of Sciences, Beijing 100049;Institute of Aviational Meteorology, Beijing 100085;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100083;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100083 |
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| Abstract: | To simulate the urban dispersion of denser-than-air gases, an urban denser-than-air dispersion model known as SLAB_URBAN model was developed. The model is based on the shallow layer theory. A new urban boundary and dispersion coefficients parameterization representing the urban wind and turbulence features is applied to the model. Tests were performed during the field campaign Urban 2000 which was held in October 2000 in Salt Lake City. The tracer data sets are adopted to demonstrate the SLAB_URBAN model performance.The focus of the comparisons is on the maximum concentration, on a given monitoring arc, normalized by the emission rate. At Urban 2000, for all samples and release times, the predictions of the SLAB_URBAN model are shown to agree with observations. Furthermore, SLAB_URBAN model is evaluated by comparison with other urban dispersion models. The SLAB_URBAN model predictions are shown to perform well in all urban dispersion models. |
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| Keywords: | denser-than-air dispersion model modeling evaluation emergency responding model urban meteo-rology |
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