| 2013年底浙西地区一次持续性灰霾天气过程分析 |
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| 引用本文： | 蓝俊倩,;王健疆,;张浩川.2013年底浙西地区一次持续性灰霾天气过程分析[J].气象与减灾研究,2014(4):56-61. |
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| 作者姓名： | 蓝俊倩 ;王健疆 ;张浩川 |
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| 作者单位： | [1]衢州市气象局,浙江衢州324000; [2]94855部队气象台,浙江衢州324000 |
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| 基金项目： | 浙江省衢州市科技专项（编号：2014N0404507） |
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| 摘 要： | 利用常规气象观测资料和NCEP 1°×1°再分析资料,对2013年底浙西地区一次持续性灰霾天气过程进行了分析。结果表明,该过程期间存在比较稳定的高、低空和地面环流形势,中低层湿度条件较差;低层以弱辐散和弱垂直运动为主,并且1000 hPa高度层以下浅薄逆温层的持续存在均有利于灰霾天气的维持;干冷空气前锋和主体影响期间,冷平流强度加大且低层有辐合中心和垂直上升运动中心出现,扩散条件好转是灰霾程度减弱的主要原因之一;浙西地区为盆地地形,南北高、中间低的地势不利于污染物的扩散。
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| 关 键 词： | 灰霾天气 逆温层 冷空气 地形 |
Analysis of a Persistent Haze Weather Process in Western Zhejiang of the End of 2013 |
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| Institution: | Lan Junqian , Wang Jianjiang , Zhang Haochuan( 1. The Quzhou Meteorological Bureau, Quzhou 324000, China ;2. Meteorological observatory of Unit 94855, Quzhou 324000, China) |
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| Abstract: | By using the conventional observation data and 6h NCEP 1°×1° reanalysis data, a persistent haze weather process in West Zhejiang during the end of 2013 was analyzed. The results indicated that the process had a relatively stable circulation of the air and the ground level with poor humidity condition at middle and low level. At low-level there was mainly a weak divergence and vertical motion, and the persistence of shallow inversion layer below 1000 hPa was conducive to the maintenance of haze.During the dry cold air effect, the increasing cold advection intensity, low layer convergence and the vertical ascending motion were the main causes of less diffusion conditions haze. The western Zhejiang is the basin topography, and is not conducive to the spread of pollutants. |
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| Keywords: | haze weather inversion layer cold air topography |
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