主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2013, Vol. 29 ›› Issue (5): 98-105.doi:

• 论　文 • 上一篇    下一篇

2006—2010年福建沿海城市群低能见度天气特征及影响因素

郑秋萍1  林长城1  王宏1  陈晓秋2  刘红年3   

  1. 1.福建省气象科学研究所，福建 福州 350001；2.福建省环境监测中心站，福建 福州 350003；3.南京大学大气科学学院，江苏 南京 210093
  • 出版日期:2013-10-31 发布日期:2013-10-31

The characteristics of low visibility weather and its impacting factors over the coastal city group in Fujian province

ZHENG Qiu-ping1 LIN Chang-cheng1 WANG Hong1 CHEN Xiao-qiu2 LIU Hong-nian3   

  1. 1. Fujian Institute of Meteorological Science, Fuzhou 350001, China; 2. Fujian Environmental Monitoring Central Station, Fuzhou 350003, China; 3. School of Atmospheric sciences, Nanjing University, Nanjing 210093, China
  • Online:2013-10-31 Published:2013-10-31

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摘要： 利用2006年1月至2010年12月各城市能见度、相对湿度、降水、天气形势和PM10的浓度资料分析福建沿海城市群低能见度天气的特征及其影响因素，并将福建沿海主要城市分成北部、中部和南部3个城市群。结果表明：北部城市群每年霾日只有8—26 d，低能见度主要是由（轻）雾引起的，而中、南部城市群低能见度主要是由霾引起的；各城市群（轻）雾和霾天气主要出现在12月至翌年6月，7—11月出现率极低，而平均能见度夏秋季节高于冬春季节；各城市群的低能见度、（轻）雾和霾均以“短暂”为主，其次是“半天”，“全天”最少；低涡切变下（轻）雾的日数最多，其次是高空槽和暖区辐合，再其次是变性冷高压；霾出现频率较高的是暖区辐合、高空槽和变性冷高压3种天气形势；PM10浓度在霾、非低能见度天气下和（轻）雾天气条件下分别为0.068—0.109 mg·m-3、0.041—0.072 mg·m-3和0.044—0.064 mg·m-3。

关键词: （轻）雾, 霾, 天气形势, PM10

Abstract:  Based on the visibility, relative humidity, precipitation, synoptic situations and the concentration of PM10 from 2006 to 2010 in Fujian province, the characteristics of low visibility weather and its impacting factors were analyzed, and the coastal cities were divided into three city groups, i.e. the north, the middle and the south. The results indicate that the annual haze days are from 8 to 26 days in the north city group and the low visibility is caused by (light) fog, while it is caused by haze in other two city groups. The (light) fog and haze weather usually occur in December to June and seldom in other months. The mean visibility is higher in summer and autumn than in winter and spring. The short duration for the low visibility weather, light fog and haze is prevailing, and then is half a day; the least is the whole day in three city groups. The light fog usually occurs under low vortex shear condition, and then under upper trough and warm zone convergence condition, the third is under transformed surface cold high condition, while haze is often under warm zone convergence, upper trough and transformed surface cold high conditions. The mass concentrations of PM10 are 0.068-0.109 mg·m-3, 0.044-0.064 mg·m-3 and 0.041-0.072 mg·m-3 under haze, (light) fog and non-low visibility weather conditions.

Key words: (Light) fog, Haze, Synoptic situation, PM10