Dry In trusion Ana lysis of a Strong Dust Storm in Hex iCorr idor

J4 ›› 2008, Vol. 26 ›› Issue (2): 30-35.

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Dry In trusion Ana lysis of a Strong Dust Storm in Hex iCorr idor

WANG Fucun^1,2 , SHAO Liang³ , GUO L iangcai⁴, FU Youzhi² , ZHANG Yue⁵

1. Key Laboratory of A rid Clim atic Change and Reducing D isaster of Gansu Province, Institute of A rid M eteorology,CMA, Lanzhou 730020, China; 2. ZhangyeM eteorological B ureau of Gansu Province, Zhangye 734000, China;3. Lanzhou M eteorological B ureau of Gansu Province, Lanzhou 730020, China;4. J iuquan M eteorological B ureau of Gansu Province, J iuquan 735000, China;5. GaotaiM eteorological S tation of Gansu Province, Gaotai 734300, China

Received:2008-03-28 Revised:2008-05-05 Online:2008-06-30 Published:2008-06-30

河西走廊一次强沙尘暴过程的干侵入分析

王伏村^{1, 2} ,邵亮³ ,郭良才⁴ ,付有智² ,张悦⁵

1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃　兰州　730020;2. 甘肃省张掖市气象局,甘肃　张掖　734000; 3. 甘肃省兰州市气象局,甘肃　兰州　730020;4. 甘肃省酒泉市气象局,甘肃　酒泉　735000; 5. 甘肃省高台县气象局,甘肃　高台　734300

作者简介:王伏村(1969 - ) ,男,甘肃临泽县人,工程师,主要从事天气预报及天气雷达应用研究.
基金资助:
国家自然基金项目“新一代天气雷达测量沙尘暴的能力和方法研究”( 40475011) 、甘肃省气象局科研项目( 2006 - 02)“甘肃夏季沙尘暴预报方法研究”、中国气象局兰州干旱气象研究所干旱气象科学研究基金项目( IAM200713)共同资助

Abstract

Abstract:

By using the reanalysis data of NCEP (1°×1°) , the dry intrusion characteristic of a strong dust storm p rocess occurred in the Hexi Corridor from Ap ril 9 to 10, 2006 was analyzed. The results show that the high potential vorticity, dry air from the upper level of troposphere extended downwards and southwards, which increased the vertical component of the vorticity on the steep iso - entropy p lane and p romoted the rap id development of the low level cyclone, resulted in a low level jet and the intensive convergence in the
boundary layer.

Key words: strong dust storm, dry intrusion, potential vorticity, low level jet, convergence

摘要：

使用NCEP (1°×1°)每天4次的再分析资料对2006年4月9～10日发生在甘肃省河西走廊的一次强沙尘暴天气进行了诊断分析。结果表明:这次强沙尘暴天气有明显的干侵入特征,对流层中高层高位势涡度,干空气在西北气流引导下,沿等熵面入侵到边界层;干侵入使对流层低层产生高位涡扰动、锋面气旋环流加强、低空急流形成、边界层辐合增强,从而引发了这次强沙尘暴天气。

关键词: 强沙尘暴, 干侵入, 位势涡度, 低空急流, 辐合

CLC Number:

P445 ⁺ . 4

WANG Fu-Cun, SHAO Liang, GUO Liang-Cai, FU Wei-Zhi, ZHANG Yue. Dry In trusion Ana lysis of a Strong Dust Storm in Hex iCorr idor[J]. J4, 2008, 26(2): 30-35.

王伏村, 邵亮, 郭良才, 付有智, 张悦. 河西走廊一次强沙尘暴过程的干侵入分析[J]. J4, 2008, 26(2): 30-35.

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Dry In trusion Ana lysis of a Strong Dust Storm in Hex iCorr idor

河西走廊一次强沙尘暴过程的干侵入分析

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