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	塔克拉玛干沙漠夏季晴空对流边界层大涡模拟
其他题名	Large-Eddy Simulation of Summer Clear Sky Convective Boundary Layer in the Taklimakan Desert
	王敏仲 1; 徐洪雄 2; 王寅钧 2; 买买提艾力·买买提依明 3; 张建涛 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2018
卷号	38 期号:6 页码:1275-1286
中文摘要	为了探索塔克拉玛干沙漠夏季晴空对流边界层湍流结构和热对流运动规律,利用沙漠腹地探空及地表通量观测资料,开展了晴空对流边界层的大涡模拟研究。结果表明:(1)沙漠夏季晴空条件下,对流边界层湍能主要由地表热力浮力对流产生,机械剪切对边界层湍能的贡献较小,小尺度湍涡对湍能的耗散随高度呈减弱趋势,边界层湍能变化呈现间歇性特点。(2)沙漠夏季晴空边界层中存在着有组织的热对流泡现象,热泡最大上升速度可超过4.0 m·s~(-1);沙漠热对流运动一般呈羽状和网状分布特征,在上升运动区周围伴随有大片的下沉辐散区域。(3)地表感热和逆温层顶盖强度是控制和影响沙漠对流边界层发展的两个重要因素,感热增大,对流边界层变暖且高度升高;感热减小,对流边界层变冷且高度降低。在感热不变的条件下,逆温层顶盖强度越强,越不利于对流边界层发展,反之则相反。
英文摘要	Large-eddy simulation of clear sky convective boundary layer is carried out with sounding and surface flux observation data in the hinterland of Taklimakan Desert so as to explore the structure of the turbulence and the law of heat convection of summer clear sky boundary layer in the Desert.The study shows that:(1) Under the summer clear sky in the Taklimakan Desert,the boundary layer turbulent kinetic energy is mainly generated by the surface thermal buoyancy convection.The dissipation of turbulent kinetic energy triggered by small-scale eddy weakens as the increase of the height.The variation of the boundary layer turbulent kinetic energy has the feature of intermission.(2) Organized thermal bubbles appear in the boundary layer.The maximum ascending speed of the thermal bubbles exceeds 4.0 m·s~(-1);the thermal convection in Taklimakan Desert generally shows the pinnate and network-like distribution,with a large area of sinking divergence around the upward motion area.(3) The surface sensible heat and the intensity at the top of the inversion layer are two important factors controlling and influencing the development of the convective boundary layer in Taklimakan Desert.If the sensible heat increases,the boundary layer becomes warmer and its height also increases;if the sensible heat decreases,the boundary layer becomes colder and its height also decreases.When the sensible heat remains the same,the stronger the intensity at the top of the inversion layer is,the more negative influence it will have on the development of the convective boundary layer,vice versa.
中文关键词	塔克拉玛干沙漠 ; 晴空 ; 对流边界层 ; 大涡模拟 ; 热对流泡 ; 湍流动能
英文关键词	Taklimakan Desert clear sky convective boundary layer large-eddy simulation thermal bubble turbulent kinetic energy
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:6375715
来源机构	中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238808
作者单位	1.中国气象科学研究院;;中国气象局乌鲁木齐沙漠气象研究所, 灾害天气国家重点实验室;;, ;;乌鲁木齐, 北京;;新疆 100081;;830002, 中国; 2.中国气象科学研究院, 灾害天气国家重点实验室, 北京 100081, 中国; 3.中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国
推荐引用方式 GB/T 7714	王敏仲,徐洪雄,王寅钧,等. 塔克拉玛干沙漠夏季晴空对流边界层大涡模拟[J]. 中国气象局乌鲁木齐沙漠气象研究所,2018,38(6):1275-1286.
APA	王敏仲,徐洪雄,王寅钧,买买提艾力·买买提依明,&张建涛.(2018).塔克拉玛干沙漠夏季晴空对流边界层大涡模拟.中国沙漠,38(6),1275-1286.
MLA	王敏仲,et al."塔克拉玛干沙漠夏季晴空对流边界层大涡模拟".中国沙漠 38.6(2018):1275-1286.