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On Characteristics of Meteorological Elements of Xi'an Fog
Author(s): 
Pages: 32-34
Year: Issue:  3
Journal: Journal of Gansu Sciences

Keyword:  Boundary layerTemperatureHumidityWind;
Abstract: 利用2007-2012年L波段探空边界层资料,采用气候统计学方法分析雾过程边界层气象要素的分布特征.结果表明:西安一年四季都有大雾,雾区温度廓线有等温、贴地逆温和温度减小等变化,其中等温变化约占记录总数的64%,贴地逆温约占记录总数的33%;湿度有等湿、湿度增大、湿度减小等变化,其中湿度随高度减小的记录比例较大,约占记录总数的74%,其廓线表现出高湿 — 减小 — 增大 — 等温的变化;风向有静风(C)、东北(N-NE)偏东和西南(SSW-WSW)偏西等变化,西南向西偏转的频次约占记录总数59%,静风频率成分约占35%,风速变化≤1 m/s的约占记录总数的40%;气象要素分析表明西安的雾多为辐射雾.
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