干旱区生态环境知识资源中心(Arid): 中国北方沙尘气溶胶对云和降水影响的数值模拟研究

Arid

	中国北方沙尘气溶胶对云和降水影响的数值模拟研究
其他题名	A Numerical Study of Effects of Mineral Dust Particles on Cloud and Precipitation in the Northwest China
	康凤琴; 银燕; 张逸轩
来源期刊	气象
ISSN	1000-0526
出版年	2009
卷号	35 期号:6 页码:36-45
中文摘要	已有的研究表明中国北方千旱半干旱地区是对流层沙尘气溶胶的主要来源之一,对当地乃至全球气候都有重要的意义.利用数值模拟研究方法探讨不同干燥程度的大气背景环境下,沙尘气溶胶数浓度对混合云形成和发展的可能影响,并采用析因试验讨论了主次影响因素.结果表明:沙尘气溶胶的增加导致降水减少、延长了云在空中存在的时间,改变了云的空间结构和微观结构.析因分析表明干旱半干旱气候背景条件下,混合云的累计降水量对沙尘气溶胶数浓度变化的敏感性要高于对大气环境湿度的敏感性;沙尘气溶胶数浓度增加导致云累计降水量的减少;沙尘气溶胶数浓度和大气环境湿度对云的累计降水量的影响是复杂的,研究结果可以用于指导降水预报业务.
英文摘要	Previous studies show that the arid and semi-arid regions of North China serve as one of the principal sources of tropospheric dusts. The possible impacts of the aerosol concentration upon the formation and development of mixed clouds in the condition of different dry atmosphere was discussed based on the modeling simulation. The factorial analysis method was used to identify impacts of the major and minor factors. The evidence suggests that (1) increase in sand aerosols would lead to reducing precipitation, suppressing hail particle genesis, prolonging the existence of clouds and altering their space structure and microscopic features; (2) factorial analysis shows that in the arid and semi-arid climate the accumulated rainfall from mixed clouds is more sensitive to the change in the number concentration of aerosols than to that in atmosphere moisture; (3) the augmentation of the number concentration would reduce accumulated precipitation; (4) increase of atmospheric humidity would be responsible for more accumulated rainfall. The presented results can be employed to account for the observational fact of the reduced number of hailfall days during a dry period of North China.
中文关键词	沙尘气溶胶 ; 云和降水 ; 数值模拟研究 ; 析因分析
英文关键词	sand-dust aerosol particles cloud and precipitation numerical study the factorial experiment method
类型	Article
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:3531558
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223982
作者单位	康凤琴, 甘肃省人工影响天气办公室, 兰州, 甘肃 730020, 中国.; 张逸轩, 甘肃省人工影响天气办公室, 兰州, 甘肃 730020, 中国.; 银燕, 南京信息工程大学, 江苏省气象灾害重点实验室.
推荐引用方式 GB/T 7714	康凤琴,银燕,张逸轩. 中国北方沙尘气溶胶对云和降水影响的数值模拟研究[J],2009,35(6):36-45.
APA	康凤琴,银燕,&张逸轩.(2009).中国北方沙尘气溶胶对云和降水影响的数值模拟研究.气象,35(6),36-45.
MLA	康凤琴,et al."中国北方沙尘气溶胶对云和降水影响的数值模拟研究".气象 35.6(2009):36-45.