摘要
利用中尺度气象模式RAMS和大气扩散模式HYPACT,结合甘肃省-中科院科技合作项目"兰州市大气污染及对策研究"于2000年12月在兰州市城区进行的大气污染物监测资料,通过资料分析与模拟计算,研究了兰州市冬季SO2的扩散特点。研究结果表明:大气扩散模式较好地模拟出了SO2时空分布特征,与同期监测资料的分析结果比较一致,模式模拟的SO2浓度分布的日变化与环流场的日变化紧密相关;模拟的SO2浓度的空间分布与污染源的排放方式有关,污染源的排放高度不同,造成污染的高度也不同,高架源对地面的影响比较小,而中、低架源对地面的影响比较大。
Utilizing meso-scale meteorological model RAMS and atmospheric diffusion model HYPACT, combined with atmospheric pollution monitoring data, observed during Dec 2000 in the urban district of Lanzhou by the Gansu province and the Chinese Academy of Science joint project_ 'Research on Lanzhou atmospheric pollution and countermeasures', the features of SO_2 diffusion in Lanzhou winter are studied through data analyzing and model simulation. The results show that the atmospheric diffusion model simulated well the temporal and spatial characteristics of SO_2 concentration distribution and its results is in line with the observation data. And the simulated diurnal variation of SO_2 concentration distribution is in good term with that of wind circulation field. The simulated spatial distribution of SO_2 is related with the discharging types of pollution source, i.e., the high concentration heights vary corresponding to the different pollution source heights, and the high source has relatively little influence on the ground as opposed to low and middle sources.
出处
《城市环境与城市生态》
CAS
CSCD
2005年第3期23-26,共4页
Urban Environment & Urban Ecology
基金
国家自然科学基金项目(40305020)
中国科学院北京大气物理研究所LAPC重点实验室开放课题(LAPC-KF-2004-01)共同资助
关键词
复杂地形
大气边界层
SO2
扩散特征
complex terrain
atmospheric boundary layer (ABL)
SO_2
diffusion feature
