摘要
根据2000年到2008年广东省和香港特别行政区的空气质量观测资料,对珠江三角洲污染天气的时空分布特征及其成因进行了初步分析。并利用美国宾州大学(PSU)和美国国家大气研究中心(NCAR)研制的第5代中尺度气象预报模式MM5对2008年1月3号到1月6号珠江三角洲地区一次污染过程进行了数值模拟。研究结果表明:珠江三角洲地区空气污染天气,在空间上主要分布在珠江口附近,以佛山、东莞、广州最为明显;在时间上,主要分布在华南地区的干季;其中,以12月分布最多,而6月最少,秋冬两季达到空气污染的天数占全年空气污染天数的80%以上。模式模拟的边界层逆温层、风速和风向、地面辐射场、混合层高度等气象特征与实际观测结果也比较一致,重现了此次大气污染过程中污染物的积聚过程。
According to the 2000 to 2008 in Guangdong Province and Hong Kong Special Administrative Region air quality data, pollution in the Pearl River Delta temporal and spatial distribution of the weather and its causes were analyzed. And use of the University of Pennsylvania （PSU） and the U. S. National Center for Atmospheric Research （NCAR） developed the first generation of the 5 - scale weather forecasting model MM5 on January 3, 2008 to January 6 the Pearl River Delta region once the process of pollution Numerical simulation. The results showed that： air pollution in the Pearl River Delta region weather in space mainly in the vicinity of the Pearl River Estuary, Foshan, Dongguan, Guangzhou is most obvious in terms of time, mainly in the dry season in southern China which, up to December distribution And June at least, autumn and winter air pollution to the number of days of annual API index over 100 days of 80 percent or more. The simulation model boundary layer inversion layer, wind speed and direction, surface radiation, mixed -layer height, and other characteristics of meteorological obsen＇ation and actual results more consistent and reproducible by the accumulation of atmospheric pollution during the process.
出处
《中山大学研究生学刊（自然科学与医学版）》
2008年第3期42-49,共8页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
关键词
珠江三角洲
空气污染
数值模拟
逆温层
API
混合层高度
the Pearl River Delta
air pollution
numerical simulation
inversion layer
API
mixed - layer height
