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Beijing Persistent Pollution and Its Relationship with General Meteorological Features

Author: SuiZuoZuo
Tutor: YangJun;WangZiFa
School: Nanjing University of Information Engineering
Course: Atmospheric Physics and Atmospheric Environment
Keywords: PM10 Continued pollution Meteorological Elements The probability of contamination
CLC: X16
Type: Master's thesis
Year: 2007
Downloads: 264
Quote: 2
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Abstract


In recent years, respirable particulate matter has become the primary pollutant in the atmosphere in Beijing, and the rapid economic development in Beijing, bring some negative impact on the ecological environment, but also the continued pollution of respirable particulate matter phenomenon become more apparent. 29th Olympic Games to be held in Beijing, when the Beijing air quality and urban visibility must meet the requirements of national standards and WHO guideline values. Therefore, continued from the Beijing region PM 10 pollution characteristics with the meteorological factors related note analyzes the Beijing urban atmospheric environmental problems of the region and to provide scientific support for the protection of Beijing during the Olympics air quality. This special selection of 9 on behalf of the station and the surrounding area in Beijing Meteorological Elements respirable concentration of particulate matter by-day monitoring data and this period of six Olympic venues from January 2003 to March 2007. A detailed analysis of Beijing and surrounding areas of respirable particulate matter pollution characteristics and causes of recent years continued pollution of the law, and for the first time summarizes the Olympic Sports Center Station nearly four years of continued pollution trends, statistics and conventional meteorological elements. The verified on the nested grid air quality forecast model (NAQPMS), its analog Beijing and surrounding cities meteorological field results, several cities in northern China in early January 2007, a typical the PM 10 < continued regional / sub> heavy pollution process. The study found: Beijing autumn in recent years, pollution is increasing trend; each sub-sites contaminated with synchronous, the the various stations PM 10 month average concentration values ??in the winter, spring festival the smallest difference, with similar levels of pollution, summer and autumn big difference, the difference approaching 0.11mg · m -3 ; have significant continuing pollution process of Beijing, Tianjin, Shijiazhuang, more often occur in spring and autumn and winter, the ground meteorological elements, relative humidity, wind speed and direction preferably greater impact. Analysis found that the heavy pollution in Beijing in early January 2007 regional continuing pollution, Northern China during the high-altitude Mongolia pressure control the northwest airflow; Beijing local ground wind speed, humidity, local pollutants is not easy proliferation, coupled January 4 Shijiazhuang, Taiyuan pollutants along the southwest wind belt conveyor to Beijing, leading to the continuing heavy pollution.

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CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental meteorology
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