干旱区生态环境知识资源中心(Arid): 塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场

Arid

	塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场
其他题名	A Study of Atmospheric Circulation and Dust Storm Causes of Formation in the Tarim Basin --The Restructured Wind Field by Shapes of Dune and Observed Prevailing Wind
	韩永翔 1; 方小敏 2; 宋连春 1; 张强1 ; 杨胜利 2
来源期刊	大气科学
ISSN	1006-9895
出版年	2005
卷号	29 期号:4 页码:627-635
中文摘要	沙漠风积地貌的形态可反映风向的长期变化, 作者通过对塔克拉玛干沙漠风积地貌形态所揭示的风向及盆地边缘气象站40年的风况分析和合并, 重建了盆地中沙尘暴形成时的风场.在分析冷空气入侵塔里木盆地的路径、盆地中不同时期热力状况的基础上, 从大气环流的角度探讨了盆地中沙尘暴的成因.结果表明, 在暖季(春、夏), 由于地面对大气感热加热作用强烈, 形成了浅薄的热低压.当不同强度的冷空气入侵时, 尽管风场有所不同, 但都会分别在和田-于田-民丰一带、柯坪一带形成强大的辐合上升区, 使这两个地区成为中国沙尘暴发生频率最高的地区.
英文摘要	Because the weather and climate differ distinctly from the plains and mountainous areas in the Tarim Ba-sin, and the meteorologic data could be only observed around the margin of the Taklimakan Desert, the detailed pat-tern of atmospheric circulation is not known in the Tarim Basin. The wind field is restructured according to the 25 surface stations observed data of prevailing wind direction for about 40 years from 1961 to 2000 and the Taklimakan Desert’s shapes of dune which can show the prevailing wind direction in the Tarim Basin. In addition, based on the analysis of the pathway of cold air entering the Tarim Basin and the different thermodynamic conditions for different seasons, the causes of the dust storm formation from the view of atmospheric circulation are discussed. The results show that: 1) because the deduced wind field by Desert’s dune of shapes is in good agreement with that of the ob-served prevailing wind direction for about 40 years, which proves that the desert wind-accumulated relief is formed by the long-term strong cold air invading the Tarim Basin; 2) in winter months, the atmosphere in the Tarim Basin is very steady due to the existence of cold air lake, so the winter is the season of the smallest wind speed and the dust storm cannot be triggered. Even if the strong cold air invades the Tarim Basin, it is difficult to trigger the dust storms for disturbing the steady atmosphere; 3) the flimsy heat low is formed in the center of Taklimakan Desert in the warming season due to surface heat being transferred via the sensible heat to the atmosphere. When the cold air invades the Tarim Basin, it can trigger the development of heat low and form the dust storm; 4) the pathways of cold air invading the Tarim Basin depend mostly on the cold air intensity. When the wind intensity is strong, it not only has the eastern and western pathways, but also the third pathway (i. e. , the middle pathway) which the cold air gets across the middle part of Tian Shan. When the wind intensity is weak, it only has the eastern and/or west-ern pathways. Though the wind field is not uniform in the Tarim Basin because of the different wind intensity, the strong air convergence areas are formed at Hotan-Yutian-Minfeng in the south of the basin and Kalpin in the north-west of the basin, respectively. The cold gale with the sands and dust supplies continually the convergence areas and the dust storm forms, so the Hotan-Yutian-Minfeng and Kalpin regions hold the high frequency of dust storm in China. In addition, it is suggested that the center of dust storm should be in the hinterland of Taklimakan Desert ac-cording to die wind speed shear line sway, which is approved by the desert shapes in the center of the Taklimakan Desert.
中文关键词	塔克拉玛干沙漠 ; 风积地貌 ; 大气环流 ; 沙尘暴 ; 辐合上升区
英文关键词	Taklimakan Desert wind-accumulated relief atmospheric circulation dust storm air convergence area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:1998645
来源机构	兰州大学 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205981
作者单位	1.中国气象局兰州干旱气象研究所, 兰州, 甘肃 730020, 中国; 2.兰州大学,地理科学系, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	韩永翔,方小敏,宋连春,等. 塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场[J]. 兰州大学, 中国气象局兰州干旱气象研究所,2005,29(4):627-635.
APA	韩永翔,方小敏,宋连春,张强,&杨胜利.(2005).塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场.大气科学,29(4),627-635.
MLA	韩永翔,et al."塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场".大气科学 29.4(2005):627-635.