摘要
利用冀中滨海平原区廊坊市1971—2000年9个观测站大雾资料,对该区域大雾、浓雾的形成特征及变化进行了分析,得出结果:(1)大雾尤其浓雾是冀中滨海平原区秋、冬季发生频率最高的灾害性天气之一;(2)大雾、浓雾除具有低能见度外,其连续性、持续性和大范围同日出现等也是不容忽视的具有灾害性影响的特征;(3)自1990年以来,年平均大雾日的变化有明显加剧的现象,相比20世纪80年代,90年代浓雾日数有明显增加的趋势;(4)影响大雾日数变化的主要原因是天气、气候条件的变化,浓雾日数的增加还与城市经济化发展、空气污染程度加剧等因素有关。
Based on the data of fog from 9 weather stations in the central coastal plain of Hebei Province during 1971-2000. The formative characteristics and it＇s decadal change of fog are analyzed. The results show ： 1 ） Fog is one of disastrous weathers of highest frequency in winter and autumn in the central seaside plain ;2）In addition to low visibility, continuous occurence, long duration and large range are al- so the formative characteristics of fogs, which have disastrous impacts, and can not be neglected ;3 ）Af- ter the 1990s, the annual number of heavy fog day has evidently increased in comparision with the 1980s and 1990s;4）The main reason for increase in fog days is the changes in weather and climate condition, and it is also closely related to human activities which lead to the development of city economy and the excerbation of air pollution.
出处
《南京气象学院学报》
CSCD
北大核心
2007年第3期359-364,共6页
Journal of Nanjing Institute of Meteorology
关键词
大雾
浓雾
形成特征
变化
heavy fog
dense fog
formative characteristics
change
