|
|||||
|
|
| 重庆城区浓雾的基本特征 | |
| 引用本文： | 江玉华,王强,李子华,马力.重庆城区浓雾的基本特征[J].气象科技,2004,32(6):450-455. |
| 作者姓名： | 江玉华 王强 李子华 马力 |
| 作者单位： | 1. 中国气象科学研究院,北京,100081;重庆市气象局,重庆,401147 2. 中国气象局培训中心,北京,100081 3. 南京气象学院,南京,210044 4. 南京气象学院,南京,210044;重庆市气象局,重庆,401147 |
| 基金项目： | 国家自然科学基金 (4 0 2 75 0 0 6)，重庆市科委重点攻关课题 (2 0 0 0 -64 85 )资助 |
| 摘 要： | 统计分析沙坪坝1951～2002年间发生的浓雾事件，结合2001年12月重庆市雾的外场试验资料，探索重庆市主城区浓雾的基本特征。重庆主城区浓雾随年代演变有减缓趋势；主城区浓雾是自然雾与烟尘等的混合物，河谷及城市效应使雾更浓；城市中出现浓雾的大气边界层特征是在近地面层有逆温及增湿降温现象；高浓度气溶胶的净辐射效应阻碍白天混合层发展，使大气边界层趋于稳定，它是重庆连续几天有雾的原因之一；浓雾具有一定的湿沉降作用，能有限地清洁空气；有浓雾的天气条件下，建议降低污染物的排放总量，以避免严重大气污染事件发生。 |
| 关 键 词： | 浓雾 大气边界层 沉降作用 近地面层 天气条件 混合层 净辐射 重庆 主城区 效应 |
| 修稿时间： | 2004年4月22日 |
Characteristics of Fog in Chongqing Urban Area |
|
| Jiang Yuhu,Wang Qiang Li Zihua Ma Li.Characteristics of Fog in Chongqing Urban Area[J].Meteorological Science and Technology,2004,32(6):450-455. | |
| Authors: | Jiang Yuhu Wang Qiang Li Zihua Ma Li |
| Institution: | Jiang Yuhua 1,4 Wang Qiang2 Li Zihua3 Ma Li 3,4 |
| Abstract: | Fog field observation data during December 2002 and historic data from 1951 to 2002 in the Shapingba district of Chongqing were analyzed, and major characteristics of fog were described. The occurrence frequency of heavy fogs has a decreasing trend. Heavy fogs in the downtown area are the mixture of natural fog, smoke and dust, and the river valley and urban effects densify fogs. The PBL characteristics associated with heavy fogs are the temperature inversion, humidity increase and temperature decrease in the near-surface layer. The net radiation effect of high-concentration aerosol prevents the daytime mixing layer from developing, leading to the stabilization of PBL. It is the main reason for heavy fogs to last several days in the Chongqing downtown area. Heavy fogs play a role of wet deposition, cleaning the air to a certain degree. It is suggested that the total emission of pollutants should be controlled during heavy fog days to avoid the occurrence of heavy pollution events. |
| Keywords: | urban heavy fog air pollution weather background basic characteristic |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《气象科技》浏览原始摘要信息 | |
| 点击此处可从《气象科技》下载免费的PDF全文 | |