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1971—2015年鄂尔多斯市大雾气候特征分析
作者姓名:于涛
作者单位:内蒙古鄂尔多斯市伊金霍洛旗气象局
摘    要:选用1971—2015年鄂尔多斯市气象观测站逐日地面气象观测资料,统计分析近45年大雾气候特征。结果表明,1971—2015年鄂尔多斯市大雾天气呈现出很大的波动性,20世纪70年代,鄂尔多斯大雾天气呈现出逐年下降的趋势,进入到80年代则逐渐上升,从90年代往后增加趋势更为明显,总体鄂尔多斯大雾天气呈现出逐年增加的趋势;鄂尔多斯市大雾天气主要在夏季末和秋季最为集中,而春季4—5月和夏季初出现大雾天气较少;鄂尔多斯市大雾出现在白天的概率为65.4%,夜间出现频率为34.6%;因鄂尔多斯市境内复杂多样的地形地貌,使得各个区域的大雾分布有较大差异,近45年鄂尔多斯市西北部地区大雾天气出现次数较少,东南部大雾天气频繁出现。

关 键 词:大雾  时空分布  特征  鄂尔多斯市

Climatic Characteristics of Heavy Fog in Ordos City from 1971 to 2015
Authors:YU Tao
Institution:(Meteorological Bureau of Yijinhuoluo Banner, Ordos, Inner Mongolia 017200)
Abstract:The daily surface meteorological observation data of Ordos meteorological observatory from 1971 to 2015 were used to analyze the climatic characteristics of heavy fog in recent 45 years. The results showed that the foggy weather in Ordos City showed great fluctuation from 1971 to 2015. In the 1970s, the foggy weather in Ordos showed a downward trend year by year, but gradually increased in the 1980s, especially since the 1990s. Overall, the foggy weather in Ordos showed an increasing trend year by year. The foggy weather in Ordos was mainly concentrated in late summer and autumn, but less in Spring (April-May) and early summer. The probability of fog occurring in the daytime was 65.4% and the frequency of fog occurring at night was 34.6%. Because of the complex and diverse topography and landforms in Ordos, the fog distribution in different regions was quite different. In recent 45 years, the fog weather in Northwest Ordos had occurred less frequently, and the fog weather in Southeast Ordos had frequently occurred.
Keywords:Heavy fog  Spatial and temporal distribution  Characteristics  Ordos City
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