干旱区生态环境知识资源中心(Arid): Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations

Arid

DOI	10.1007/s10546-021-00620-6
	Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations
	Li, Jian; Guo, Jianping; Xu, Hui; Li, Jing; Lv, Yanmin
通讯作者	Guo, JP ; Xu, H (corresponding author), Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China.
来源期刊	BOUNDARY-LAYER METEOROLOGY
ISSN	0006-8314
EISSN	1573-1472
出版年	2021
卷号	180 期号:1 页码:155-171
英文摘要	Surface-layer stability is important in many processes, such as in the surface energy budget, atmospheric pollution, and boundary-layer parametrizations. Most previous studies on stability, however, conducted either theoretical or observational investigations at specific sites, thus leaving a gap with regard to the large-scale pattern. Here, wind-speed and temperature observations at multiple heights from the wind-tower network of China are used to estimate low-level stability during the 2009-2016 period. A series of data-quality-control procedures are conducted and data from 170 wind towers with more than 2 years of valid observations are selected. The degree of stability is classified by the Obukhov length, which is derived from the wind speed and temperature at 10 m and 70 m above ground level, combined with information regarding the roughness length. Overall, the occurrence frequency of surface-layer instability exhibits significant temporal and spatial variability, being particularly larger in spring and summer than in autumn and winter. The maximum frequency of summertime instability occurs in the time period 1000-1200 local solar time, approximately 2 h earlier than in autumn. Geographically, the peak instability frequency occurs much earlier in the day in north-west China than in other regions, likely owing to the arid and semi-arid land cover. Also noteworthy is the steady increase in instability frequency observed during the period analyzed here, likely resulting from the reduction in the vertical gradient of wind speed. Our findings call for explicit consideration of stability variability in the wind-energy industry and in fundamental boundary-layer investigations in China.
英文关键词	Obukhov length Roughness length Surface-layer stability Chinese wind-tower network
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000642049700001
WOS关键词	PLANETARY BOUNDARY-LAYER ; ATMOSPHERIC STABILITY ; ROUGHNESS LENGTH ; HONG-KONG ; SPEED ; HEIGHT ; PROFILE ; DISPLACEMENT ; TEMPERATURE ; POLLUTION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349755
作者单位	[Li, Jian; Guo, Jianping; Xu, Hui; Lv, Yanmin] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China; [Li, Jing] Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Li, Jian,Guo, Jianping,Xu, Hui,et al. Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations[J]. 北京大学,2021,180(1):155-171.
APA	Li, Jian,Guo, Jianping,Xu, Hui,Li, Jing,&Lv, Yanmin.(2021).Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations.BOUNDARY-LAYER METEOROLOGY,180(1),155-171.
MLA	Li, Jian,et al."Assessing the Surface-Layer Stability over China Using Long-Term Wind-Tower Network Observations".BOUNDARY-LAYER METEOROLOGY 180.1(2021):155-171.