什邡市1959－2010年雾的气候特征及变化分析
Analysis on Climate Characteristics and Variation of Fog in Shifang From 1959 to 2010
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摘要: 利用四川什邡市1959－2010年地面气象观测资料，分析什邡市雾的气候特征、变化趋势以及强浓雾与气象要素的关系，结果表明：近52年什邡市雾呈整体增多趋势，具有显著的季节差异，月雾日数呈单峰特征；秋冬季强浓雾占全年频次的75％，出现强浓雾时的气象要素特点为温度低、湿度大、温度露点差和风速小，主导风向为偏北风；年、秋、冬雾日数均检测到有明显突变并呈显著增加的趋势。
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关键词:
- 什邡市、雾、气候特征、气象要素、突变
Abstract: On the basis of ground meteorological observation data of this area from 1959 to 2010 ,the cli-mate characteristics of fog in Shifang and its variation trend as well as the relations between heavy fog and meteorological elements have been analyzed in this paper .T he results indicate that the fog of this area in recent 52 years shows an overall increasing trend and significant seasonal differences with the foggy days in single peak feature ;the heavy fog in autumn and winter accounts for 75% of the annual frequency ;the me-teorological elements of the heavy fog are low temperature ,high humidity ,small dew-point deficit and wind speed and north wind as the dominate wind direction ;all the annual ,autumn and winter foggy days were detected a significant increase in the trend . -
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