| 北方15个大型城市总悬浮颗粒物的季节变化 |
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| 引用本文： | 安俊岭,张仁健,韩志伟.北方15个大型城市总悬浮颗粒物的季节变化[J].气候与环境研究,2000,5(1):25-29. |
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| 作者姓名： | 安俊岭 张仁健 韩志伟 |
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| 作者单位： | 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029 |
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| 基金项目： | “知识创新工程”重点基金8-2210和中国科学院大气物理研究所所长重点基金98-209 |
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| 摘 要： | 对1998年7月至1999年6月北方15个大型城市空气质量监测结果进行了分析。结果表明：（1）中国北方大型城市（北京除外）大气中的首要污染物是总悬浮颗粒物，年平均发生频数在70%～100%之间。（2）各大城市空气质量为II级的发生频数均在夏、秋季高，春、冬季低。局地因素（当地的气象条件、地貌状况、植被分布以及人们的活动状况）是形成这种季节变化的主要原因。（3）空气质量为III级的发生频数不同城市有不同的季节性。除局地因素的影响外，邻近城市之间的相互输送是一个主要原因。（4）各大城市空气质量IV级的发生频数均在春、冬季高，夏、秋季低。春、冬季节北方多大风或强风天气引起西北干旱区沙、尘的长距离输送是产生这种季节变化的根本原因。这也说明西北干旱区的绿化、固沙工作迫切需要加强。
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| 关 键 词： | 总悬浮颗粒物 空气质量 空气污染指数 空气质量周报 发生频数 |
Seasonal Changes of Total Suspended Particles in the Air of 15 Big Cities in Northern Parts of China |
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| An Junling,Zhang Renjian and Han Zhiwei.Seasonal Changes of Total Suspended Particles in the Air of 15 Big Cities in Northern Parts of China[J].Climatic and Environmental Research,2000,5(1):25-29. |
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| Authors: | An Junling Zhang Renjian and Han Zhiwei |
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| Abstract: | One-year (from July of 1998 to June of 1999) monitoring data on air quality of 15 big cities in northern parts of China are analyzed Analysis indicates that: (1) major pollutant in the air of big cities except Beijing is total suspended particles, i e , TSP, and the yearly averaged occurrence frequency of TSP is between 70% and 100%; (2) II-level-air-quality occurrence frequency is always high in the summer and fall and low in the spring and winter for each big city due to influence of local factors (terrain, vegetation distributions, meteorological conditions and anthropogenic activities); (3) III-air-quality occurrence frequency has not all the same seasonal changes for different cities owing to influence of local factors and transport of TSP among neighboring cities; (4) IV-or-V-air-quality occurrence frequency is always high in the spring and winter and low in the summer and autumn because during the spring and winter strong wind often occurs in the Northern or Northwestern China and causes long-range transport of dust or sand produced in the arid or desert area This implies that due-fixing forest is extremely needed strengthening in the area |
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| Keywords: | total suspended particle air quality air pollution index weekly air quality report occurrence frequency |
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