| 乌兰察布地区一次大范围沙尘天气过程分析 |
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| 引用本文： | 刘建梅,高晶,包福祥.乌兰察布地区一次大范围沙尘天气过程分析[J].内蒙古气象,2012(2):3-4,10. |
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| 作者姓名： | 刘建梅 高晶 包福祥 |
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| 作者单位： | 1. 丰镇气象局,内蒙古丰镇,012100
2. 内蒙古气候中心,内蒙古呼和浩特,010051 |
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| 摘 要： | 运用常规气象观测资料,从天气环流形势的演变过程及有关物理量变化状况,对2010年3月19—20日发生在乌兰察布地区沙尘天气过程做了客观分析。分析结果表明：造成这次沙尘天气过程的主要影响天气系统是蒙古气旋和地面冷锋。蒙古气旋后部西北强冷空气侵入为起源于蒙古国西南部以及内蒙古西中部周边沙尘的输送提供了动力条件;地面冷锋过境使该地区温度梯度增大,空气对流上升加剧,为上游输送而来的尘土、沙石卷入空中浮悬提供了抬升条件。两者共同作用促使沙尘天气过程持续时间长、范围广,并伴有扬沙和沙尘暴出现。
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| 关 键 词： | 蒙古气旋 高空冷槽 冷高压 扬沙 沙尘暴 |
Analysis on A Large-scale Sand-dust Weather Process in Ulanqab Area |
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| Authors: | Liu Jianmei Gao Jing Bao Fuxiang |
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| Institution: | 1.Fengzhen Meteorological Bureau,Inner Mongolia Fengzhen 012100; 2.Inner Mongolia Climate Centre,Inner Mongolia Hohht 010051) |
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| Abstract: | Using conventional meteorology observational data,the process of dust weather was analyzed on March 19-20,2010 in Wulanchabu city from the process of the weather circulation turning and the conditions of the physical quantity changing.The results showed: the event was caused by the Mongolian cyclone and ground cold front.The coming of the northwest strong cold air behind Mongolian cyclone provided dynamic condition for transport dust from the northeast of Mongolia and midwest in Inner Mongolia.The passing of cold front increased the temperature gradient of this area and the rise of air convection.It also provided the raise condition for dust and sand into the air from forward-upstream.Both of them make the dust weather sustain time lengthways and rangewide as the appearance of sand blowing and dust storm. |
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| Keywords: | Mongolian cyclone high level cold trough cold high sand blowing dust storm |
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