干旱区生态环境知识资源中心(Arid): 覆盖逆温强度对干旱区超厚对流边界层影响的大涡模拟

Arid

	覆盖逆温强度对干旱区超厚对流边界层影响的大涡模拟
其他题名	Large eddy simulation of the effect of the intensity of capping inversion on a super-thick convective boundary layer in an arid area
	王蓉; 黄倩; 张强
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2020
卷号	37 期号:4
中文摘要	基于干旱沙漠地区敦煌野外观测资料和大涡模式,模拟研究了覆盖逆温强度对干旱区超厚对流边界层发展及边界层顶夹卷作用的影响。结果表明:① 覆盖逆温层被打破之前,覆盖逆温强度越弱,混合层越不稳定,越有利于湍流垂直向上发展,对流边界层、混合层和夹卷层都较厚,夹卷速度较大,边界层顶夹卷作用较强。当覆盖逆温层被充分发展的边界层对流完全贯穿以后,原本被限制在厚度小但能量大的强覆盖逆温层下的边界层对流,湍流混合更剧烈,边界层顶夹卷作用更强,更有利于混合层与覆盖逆温层之上的中性层结混合,形成厚度较大的超厚边界层。② 覆盖逆温层被打破之前,驱动边界层发展的湍流动能主要由热浮力提供;覆盖逆温层被打破以后,混合层中的切变产生项对边界层湍流动能贡献最大。
英文摘要	The impacts of the intensity of capping inversion on the development of a super-thick convection boundary layer and the entrainment process in an arid area were simulated by large eddy simulation using intensive field observation data from Dunhuang,China.The results show that:(1)Before the capping inversion was broken,the weaker inversion was,the more unstable the mixed layer;the more favorable the turbulent vertical upward development;the thicker the convective boundary layer,mixed layer,and entrainment layer;and the greater the entrainment speed.Additionally,the entrainment effect was strong at the top of the boundary layer when the inversion was weaker.When the capping inversion layer was completely convective through the fully developed boundary layer,the boundary layer convection,which was originally confined to the strong overlying inversion layer with low thickness and high energy,the convection mixing was more intense,the entrainment was stronger,and the more likely it was that the mixed layer and the neutral layer above the inversion layer would mix to form a super-thick boundary layer.(2)Before the capping inversion was broken,the turbulent kinetic energy of the boundary layer was mainly provided by thermal buoyancy.After the capping inversion layer was broken,the shear production term in the mixing layer contributed the most to the turbulent kinetic energy of the boundary layer.
中文关键词	大气边界层 ; 覆盖逆温强度 ; 超厚对流边界层 ; 夹卷作用 ; 大涡模拟
英文关键词	atmospheric boundary layer intensity of capping inversion super-thick convective boundary layer entrainment large eddy simulation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6834393
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353515
作者单位	王蓉, 甘肃省人工影响天气办公室;;兰州大学大气科学学院, ;;半干旱气候变化教育部重点实验室, 兰州;;兰州, 甘肃;;甘肃 730020;;730000, 中国. 黄倩, 兰州大学大气科学学院, 半干旱气候变化教育部重点实验室, 兰州, 甘肃 730000, 中国. 张强, 甘肃省气象局, 兰州, 甘肃 730020, 中国.
推荐引用方式 GB/T 7714	王蓉,黄倩,张强. 覆盖逆温强度对干旱区超厚对流边界层影响的大涡模拟[J]. 兰州大学,2020,37(4).
APA	王蓉,黄倩,&张强.(2020).覆盖逆温强度对干旱区超厚对流边界层影响的大涡模拟.干旱区研究,37(4).
MLA	王蓉,et al."覆盖逆温强度对干旱区超厚对流边界层影响的大涡模拟".干旱区研究 37.4(2020).