兰州大学学报(自然科学版)
蘭州大學學報(自然科學版)
란주대학학보(자연과학판)
JOURNAL OF LANZHOU UNIVERSITY(NATURAL SCIENCES)
2012年
6期
69-73
,共5页
空气污染%大气边界层%山谷城市
空氣汙染%大氣邊界層%山穀城市
공기오염%대기변계층%산곡성시
air pollution%atmospheric boundary layer%valley city
利用来自环保部门的空气污染资料,分析了近11年兰州市空气污染特征;结合气象地面和探空观测资料,分析了山谷地形条件下大气边界层结构对兰州空气污染的影响.结果是兰州近11年的空气污染有整体减轻趋势,但污染仍很严重,空气质量大多年份都达不到国家二级水平,污染物主要为可吸入颗粒物.严重污染时期集中在秋末、冬季和春季,秋冬季空气污染较稳定,主要受可高达1000 m的深厚稳定边界层影响,而春季空气污染指数标准偏差较大.11年空气污染指数的月平均次高峰出现在3月,相对以往研究提前了1个月.
利用來自環保部門的空氣汙染資料,分析瞭近11年蘭州市空氣汙染特徵;結閤氣象地麵和探空觀測資料,分析瞭山穀地形條件下大氣邊界層結構對蘭州空氣汙染的影響.結果是蘭州近11年的空氣汙染有整體減輕趨勢,但汙染仍很嚴重,空氣質量大多年份都達不到國傢二級水平,汙染物主要為可吸入顆粒物.嚴重汙染時期集中在鞦末、鼕季和春季,鞦鼕季空氣汙染較穩定,主要受可高達1000 m的深厚穩定邊界層影響,而春季空氣汙染指數標準偏差較大.11年空氣汙染指數的月平均次高峰齣現在3月,相對以往研究提前瞭1箇月.
이용래자배보부문적공기오염자료,분석료근11년란주시공기오염특정;결합기상지면화탐공관측자료,분석료산곡지형조건하대기변계층결구대란주공기오염적영향.결과시란주근11년적공기오염유정체감경추세,단오염잉흔엄중,공기질량대다년빈도체불도국가이급수평,오염물주요위가흡입과립물.엄중오염시기집중재추말、동계화춘계,추동계공기오염교은정,주요수가고체1000 m적심후은정변계층영향,이춘계공기오염지수표준편차교대.11년공기오염지수적월평균차고봉출현재3월,상대이왕연구제전료1개월.
The characteristics of air pollution in Lanzhou in the past 11 years were analyzed by using air pollu-tion observations from the environmental protection department concerned. Combined with the meteorological data, such as the surface observations and the sounding data, the effect of the atmospheric boundary layer on air pollution was investigated under the valley terrain conditions. The results show that air pollution has been reduced in recent 11 years but the situation is still severe. The air quality could not meet the nationalⅡlevel in the most years. The main air pollutant is respirable suspended particulate. The heavy air pollution periods are distributed in late autumn, winter and spring. Especially, heavy air pollution in winter, which has appeared to be in a stable condition, is mainly influenced by the highly stable boundary layer which is at a height of nearly 1 000 m. In the spring, the standard deviation of the air pollution index is larger than the other seasons. The second peak of the monthly average of the air pollution index is found in March. Compared with the previous research, this study has found that it has advanced by 1 month.