| 西北地区一次斜压槽引发的强沙尘暴研究 |
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| 引用本文： | 徐建芬,孙兰东,许东蓓,王宝鉴.西北地区一次斜压槽引发的强沙尘暴研究[J].甘肃气象,2001,19(2):40-44. |
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| 作者姓名： | 徐建芬 孙兰东 许东蓓 王宝鉴 |
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| 作者单位： | 兰州中心气象台!甘肃兰州730020 |
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| 摘 要： | 利用T10 6数值预报及常规气象资料 ,对 1998年 4月 15日西北地区强沙尘暴进行分析 ,分析结果表明 ,这是一次由斜压槽及冷锋锋生触发的沙尘暴 ,高空急流及其下部的Ferrel环流对沙尘暴发生起到重要作用 ;强沙尘暴发生在高空急流出口区右侧、5 0 0hPa正涡度中心下风方和次级反环流的上升运动区内。
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| 关 键 词： | 沙尘暴 斜压槽 次级环流 |
| 文章编号： | 1006-7639(2001)-02-0040-05 |
| 修稿时间： | 2000年8月18日 |
Study of a Dust - devil caused by tilted trough in Northwest China |
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| XU Jian-fen,SUN Lan-dong,XU Dong-bei,WANG Bao-jian.Study of a Dust - devil caused by tilted trough in Northwest China[J].Gansu Meteorology,2001,19(2):40-44. |
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| Authors: | XU Jian-fen SUN Lan-dong XU Dong-bei WANG Bao-jian |
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| Abstract: | A severe dust-devil,happened in northwest China on April 15 in 1998,was analyzed by using the normal meteorological data and NWP data of T106.The result shows the severe dust-devil caused by tilted trough and frontgenesins of cold front,high jet and Ferrel circulation are the main thermodynamics reason,severe dust-devil happened at the south side of high jet exit region and downwind of vorticity centre of 500hPa and ascending region of sub-circulation. |
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| Keywords: | dust-devil tilted trough sub-circulation |
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