| 北京市大气细粒子的质量浓度特征研究 |
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| 引用本文： | 王京丽,谢庄,张远航,邵敏,曾立民,程丛兰,徐晓峰,赵习方,孟燕军.北京市大气细粒子的质量浓度特征研究[J].气象学报,2004,62(1):104-111. |
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| 作者姓名： | 王京丽 谢庄 张远航 邵敏 曾立民 程丛兰 徐晓峰 赵习方 孟燕军 |
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| 作者单位： | 1. 中国气象局北京城市气象研究所,北京,100089
2. 北京大学环境科学中心环境模拟与污染控制国家重点联合实验室,北京,100871 |
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| 基金项目： | 北京市自然科学基金项目:用能见度推算 2 .5μm细粒子浓度方法的研究 (项目合同号 :80 1 2 0 0 9) |
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| 摘 要： | 大气能见度的降低是当今国际上比较突出的城市环境问题。北京近年的监测结果表明 ,大气中通过消光作用使大气能见度下降的气溶胶细粒子的污染程度呈现上升趋势。从 2 0 0 1年对北京市气溶胶细粒子 (空气动力学直径小于 2 .5μm的粒子 ) 4个季节的采样监测结果分析 (有效采样天数为 50d)得出 ,北京市细粒子质量浓度年平均值已超过美国国家标准的 7倍以上。研究发现细粒子的质量浓度不仅与环境条件有关 ,而且与气象条件也有着密切的关系。文中以细粒子的观测数据为基础 ,结合当时的气象条件进行细粒子浓度与气象条件定量关系的研究
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| 关 键 词： | 气象条件 定量关系 细粒子 |
| 收稿时间： | 6/9/2003 12:00:00 AM |
| 修稿时间： | 2003年6月9日 |
THE RESEARCH ON THE MASS CONCENTRATION CHARACTERISTICS OffINE PARTICLES IN BEIJING |
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| Wang Jingli,Xie Zhuang,Zhang Yuanhang,Shao Min,Zeng Limin,Cheng Conglan,Xu Xiaofeng,Zhao Xifang and Meng Yanjun.THE RESEARCH ON THE MASS CONCENTRATION CHARACTERISTICS OffINE PARTICLES IN BEIJING[J].Acta Meteorologica Sinica,2004,62(1):104-111. |
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| Authors: | Wang Jingli Xie Zhuang Zhang Yuanhang Shao Min Zeng Limin Cheng Conglan Xu Xiaofeng Zhao Xifang and Meng Yanjun |
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| Institution: | Institute of Urban Meteorology, CMA, Beijing 100089;Institute of Urban Meteorology, CMA, Beijing 100089;State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871;State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871;State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871;Institute of Urban Meteorology, CMA, Beijing 100089;Institute of Urban Meteorology, CMA, Beijing 100089;Institute of Urban Meteorology, CMA, Beijing 100089;Institute of Urban Meteorology, CMA, Beijing 100089 |
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| Abstract: | The decrease of visibility in atmosphere is the prominent problem of urban envir onment in the world. The recent year's monitoring results in Beijin g indicate that the pollution level of fine particles shows an increasing trend, which is a major factor to be responsible for visibility decreasing through the extinction. From the analysis of Beijing four season's samples of fine particle s obtained in 2001, the mass concentration of fine particles in Beijing went bey ond the US EPA standard badly and the annual average value was 6 times higher th an the Standard. The relationship between concentration of fine particles and we ather conditions were analyzed qualitatively and quantitatively, based on the si multaneous observational data of fine particles and the weather conditions in th is research. It was found that the mass concentration of fine particles was rele vant not only to the environmental condition but also to the meteorological cond itions closely. There was a significant negative correlation between mass conce ntrat ion on fine particle and wind speed in Beijing with correlation coefficient -0.8 9 in winter breeze day and -0.60 in spring breeze day. Relative humidity was a k ey factor to influence mass concentration of fine particles. Mass concentration of fine particles was showed to be highly positive correlated with relative humi dity, which correlation coefficient was near 1.0 in summer, 0.99 in spring breez e day, and 0.81 in fog day in fall. Precipitation had great washout effect on ma ss concentration of fine particles. After heavy rainfall in summer, the mass con centration of fine particles decreased quickly. The concentration of fine partic les was much lower than that in drizzle day. The results also showed that d rizzle had some washout effects to remove fine particles. The synoptic regime ha d relatively great influence upon the mass concentration of fine particles. Befo re the synoptic regime coming, the fine particles pollution was seriously. When the regime passed, the PM2.5 mass concentration decreased quickly and dramatical ly under north wind covering. |
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| Keywords: | Meteorological conditions Quantificational relat ion Fine particles (PM2 5) |
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