| 大同地区典型沙尘天气过程近地层气象要素演变特征的对比分析 |
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| 引用本文： | 郝玉峰,施占军,王淑凤.大同地区典型沙尘天气过程近地层气象要素演变特征的对比分析[J].山西气象,2012(1):25-28. |
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| 作者姓名： | 郝玉峰 施占军 王淑凤 |
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| 作者单位： | [1]山西省气象局,山西太原030002 [2]山西省大同市气象局,山西大同037000 |
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| 摘 要： | 利用2009年3月-2010年3月大同国家基准气候站20m气象梯度塔的风向、风速、气温、相对湿度的观测资料及PM10质量浓度数据、气溶胶散射系数数据，分析大同地区典型沙尘天气过程近地层气象要素演变特征。结果表明，风速在沙尘暴、扬沙的发生、发展过程中均较大，浮尘较小。气温在沙尘暴期间受冷空气的影响迅速减小，而在扬沙和浮尘天气条件下温度的变化主要取决于长短波辐射的强弱和沙尘气溶胶的辐射强迫。相对湿度在沙尘暴期间基本上呈递增态势，结束后比发生前相对湿度增大，在扬沙和浮尘天气条件下，相对湿度与温度完全呈现出反相关关系，且相对湿度均较小。PM10质量浓度在沙尘暴、扬沙、浮尘天气条件下依次递减。沙尘暴期间气溶胶散射系数明显增大。
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| 关 键 词： | 沙尘天气 气象要素 PM10 气溶胶散射系数 |
The Evolution Characteristics of Near Surface Meteorological Elements in Typical Dust Weather Process in Datong |
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| Hao Yufeng,Shi Zhanjun,Wang Shufeng.The Evolution Characteristics of Near Surface Meteorological Elements in Typical Dust Weather Process in Datong[J].Shanxi Meteorological Quarterly,2012(1):25-28. |
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| Authors: | Hao Yufeng Shi Zhanjun Wang Shufeng |
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| Institution: | 1. Shanxi Province Meteorological Bureau, Shanxi Taiyuan 030002 ; Datong City Meteorological Bureau of Shanxi Province, Shanxi Datong 037000 ) |
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| Abstract: | Based on the data of the wind direction, wind speed, air temperature, relative humidity and the data of PM 10 concentration and aerosol scattering coefficient data, the evolution of near surface meteorological elements were analyzed in typical sand and dust weather. The results show that wind speed is large in occurrence and development of a sandstorm, blowing sand but it is little in dust. Air temperature decreases rapidly because of the influence of the cold air during the sandstorm but the changing of air temperature depends on the long wave and short wave radiation and the forcing of the aerosol in blowing sand and dust weather. Relative humidity shows increasing trend during sandstorm. It is larger in end of sandstorm than before. The relationship between relative humi inversed in blowing sand and dust. PM10 concentration decreases in sandstorm, blowing sand scattering coefficient increases significantly during sandstorm. |
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| Keywords: | Dust weather Meteorological elements PM10 Aerosol scattering coefficient dity and and temperature is dust The aerosol |
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