| 重庆主城区一次重度霾天气过程分析 |
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| 引用本文： | 江文华,陈道劲,胡春梅.重庆主城区一次重度霾天气过程分析[J].气象科技,2013,41(2):343-346. |
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| 作者姓名： | 江文华 陈道劲 胡春梅 |
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| 作者单位： | 重庆市气象台,重庆,401147 |
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| 基金项目： | 重庆市气象局青年基金项目"重庆主城区霾天气特征分析及影响因子初步研究" |
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| 摘 要： | 利用NCEP再分析资料、L波段雷达探空资料、常规气象资料及自动气象站资料和空气污染资料,对2005年12月25-28日重庆主城区一次重度霾天气过程进行了分析.结果表明:此次重度霾天气过程发生在一定天气背景下,500 hPa青藏高原南侧南支槽槽区宽广,槽前西南气流较为强盛,850 hPa重庆地区持续处于均压场控制,气压梯度小,水平风速弱,且影响重庆地区的冷空气活动少、强度弱,有利于重度霾的形成和维持；低层风速较小、中低层逆温层的持续存在、气温较低也是此次重度霾形成和维持的重要条件；在未达到饱和的情况下,适当增加湿度有利于霾的加强,霾天气过程中,气溶胶粒子的吸湿增长会使能见度更加恶化.
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| 关 键 词： | 重庆 霾 逆温层 |
| 收稿时间： | 2011/10/31 0:00:00 |
| 修稿时间： | 6/4/2012 12:00:00 AM |
Analysis of a Severe Haze Event in Downtown Area of Chongqing |
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| Jiang Wenhu,Chen Daojin and Hu Chunmei.Analysis of a Severe Haze Event in Downtown Area of Chongqing[J].Meteorological Science and Technology,2013,41(2):343-346. |
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| Authors: | Jiang Wenhu Chen Daojin and Hu Chunmei |
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| Abstract: | A severe haze event happened from 25 to 28 December 2005 in the downtown area of Chongqing is analyzed based on NCEP reanalysis L band radar, conventional observation, and radiosonde data, as well as the air quality data. The results show that the severe haze event was related to the certain synoptic background. The southwesterly airflow before the wide southern branch trough at the south side of the Tibetan Plateau was strong at 500 hPa, and Chongqing was controlled by the uniform pressure field at 850 hPa, resulting in the small pressure gradient force and horizontal velocity. The cold air activities affecting Chongqing were few and weak, which were beneficial to the formation and maintenance of the severe haze event. The small wind speed at the low level and the sustained existence of inversion layer at mid low level, as well as the low temperature, were the important conditions of the haze. Under the unsaturation circumstances, the appropriate increase of humidity was conductive to the strengthening of the haze. During the haze, the coagulation of moisture particles would aggravate the visibility. |
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