| 一次大面积降雪多普勒速度特征 |
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| 引用本文： | 谢向阳,赵学军.一次大面积降雪多普勒速度特征[J].新疆气象,2003,26(3):22-23. |
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| 作者姓名： | 谢向阳 赵学军 |
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| 作者单位： | 五家渠市气象局 新疆五家渠831300
(谢向阳)，五家渠市气象局 新疆五家渠831300(赵学军) |
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| 摘 要： | 利用CINRAD／CC多普勒雷达速度回波资料分析了2002年12月15—16日凌晨新疆北部沿天山一带的大面积降雪过程。结果表明：速度资料中的冷(暖)平流和辐合(散)与降雪的形成、维持和消散关系密切。逆风区和速度梯度大的区域附近一般与反射率因子较大值区域相对应。而且，速度回波分布变化较强度回波分布变化提前，对降雪的短时预报有一定指导意义。
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| 关 键 词： | 大面积降雪 多普勒速度 逆风区 平流 辐合 辐散 短时预报 |
| 文章编号： | 1002-0799(2003)03-0022-02 |
| 修稿时间： | 2003年1月16日 |
The Doppler Velocity Characteristic of a Large Area Snowfall |
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| XIE Xiang-yang,ZHAO Xue-jun.The Doppler Velocity Characteristic of a Large Area Snowfall[J].Bimonthly of Xinjiang Meteorology,2003,26(3):22-23. |
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| Authors: | XIE Xiang-yang ZHAO Xue-jun |
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| Abstract: | CINRAD/CC Doppler radar velocity echo data is used to analyze the process of the large area snowfall along the Tianshan Mountain in North Xinjiang from 15 to 16 Dec.of 2002.The result shown that the cold(warm)advection and convergence(divergence)in the velocity data were interrelated with the formation,maintenance,and disappearance of the snow-fall.Generally speaking,theinverseaircurrentarea and the area around bigvelocity gradientcorresponded with the biggervaluearea of there flectance factors.Thevelocity echo distribution had earlier change than the intensity echo distribution which is helpful to nowcasting. |
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| Keywords: | large area snowfall Doppler velocity advection convergence |
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