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| “7.17”西北夏季沙尘暴数值模拟 | |
| 引用本文： | 赵建华,张强,李耀辉,刘世祥,隆霄.“7.17”西北夏季沙尘暴数值模拟[J].中国沙漠,2009,29(6):1221-1228. |
| 作者姓名： | 赵建华 张强 李耀辉 刘世祥 隆霄 |
| 作者单位： | 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;兰州大学,大气科学学院,甘肃,兰州,730000 2. 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 3. 兰州大学,大气科学学院,甘肃,兰州,730000 |
| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
| 摘 要： | 对2005年7月17日发生在西北地区近20 a来夏季最强的沙尘暴过程进行了数值模拟研究,结果得到:①沙尘暴发生前,沙源处于高温控制下;②起沙是水平低涡和垂直涡叠加而成的一种类似于Benard对流泡的系统扫掠沙源的结果;③起沙主要发生在水平低涡移动方向的右部。 |
| 关 键 词： | 沙尘暴 起沙 涡叠加 |
| 收稿时间： | 2008-3-14 |
| 修稿时间： | 2008-9-24 |
Numerical Simulation of "7.17" Sand-dust Storm in Northwest China |
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| ZHAO Jian-hua,ZHANG Qiang,LI Yao-hui,LIU Shi-xiang,LONG Xiao.Numerical Simulation of "7.17" Sand-dust Storm in Northwest China[J].Journal of Desert Research,2009,29(6):1221-1228. | |
| Authors: | ZHAO Jian-hua ZHANG Qiang LI Yao-hui LIU Shi-xiang LONG Xiao |
| Institution: | 1.Institute of Arid Meteorology, China Meteorological Administration; Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou 730020, China; 2.College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China |
| Abstract: | A sand-dust storm which occurred over northwest China on Jul 17, 2005 was known as the severest one in summer of the recent 20 years. It was simulated by dust model-GRAPES_SDM with purpose of finding out its potential starting mechanism. The results show that ①the dust source area was dominated by high temperature before the sand-dust storm occurrence; ②dust emission was resulted from the sediments being swept by the superposed flow of horizontal low vortex and vertical vortex which coupled into a cell resembling to well-known Benard convective cell; ③dust emission mainly occurred at the right of the moving orientations of the horizontal low vortex. |
| Keywords: | dust storm dust emissions superposition of vortices |
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