气候变化领域集成服务门户(CCPortal): Long-lived high-frequency gravity waves in the atmospheric boundary layer: Observations and simulations

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DOI	10.5194/acp-19-15431-2019
	Long-lived high-frequency gravity waves in the atmospheric boundary layer: Observations and simulations
	Jia M.; Yuan J.; Wang C.; Xia H.; Wu Y.; Zhao L.; Wei T.; Wu J.; Wang L.; Gu S.-Y.; Liu L.; Lu D.; Chen R.; Xue X.; Dou X.
发表日期	2019
ISSN	16807316
起始页码	15431
结束页码	15446
卷号	19 期号:24
英文摘要	A long-lived gravity wave (GW) in the atmospheric boundary layer (ABL) is analysed during a field experiment in Anqing, China (30'37° N, 116'58° E). Persistent GWs with periods ranging from 10 to 30 min over 10 h in the ABL within a 2 km height are detected by a coherent Doppler lidar from 4 to 5 September 2018. The amplitudes of the vertical wind due to these GWs are approximately 0.15-0.2ms-1. The lifetimes of these GWs are longer than 20 wave cycles. There is no apparent phase progression with altitude. The vertical and zonal perturbations in the GWs are 90° out of phase, with vertical perturbations generally leading to zonal ones. Based on experiments and simplified two-dimensional computational fluid dynamics (CFD) numerical simulations, a reasonable generation mechanism of this persistent wave is proposed. A westerly low-level jet of ∼ 5ms-1 exists at an altitude of 1-2 km in the ABL. The wind shear around the low-level jet leads to wave generation under the condition of light horizontal wind. Furthermore, a combination of thermal and Doppler ducts occurs in the ABL. Thus, the ducted wave motions are trapped in the ABL and have long lifetimes. © Author(s) 2019.
语种	英语
scopus关键词	altitude; boundary layer; computational fluid dynamics; Doppler lidar; gravity wave; numerical model; satellite data; satellite imagery; Anhui; Anqing; China
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143962
作者单位	Glory China Institute of Lidar Technology, Shanghai, 201315, China; CAS Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei, 230026, China; Electronic Information School, Wuhan University, Wuhan, 430072, China; Anqing Meteorological Bureau, China Meteorological Administration, Anqing, 246001, China; Technical Support Center for Atmosphere Observation, Anhui Meteorological Bureau, China Meteorological Administration, Hefei, 230031, China
推荐引用方式 GB/T 7714	Jia M.,Yuan J.,Wang C.,et al. Long-lived high-frequency gravity waves in the atmospheric boundary layer: Observations and simulations[J],2019,19(24).
APA	Jia M..,Yuan J..,Wang C..,Xia H..,Wu Y..,...&Dou X..(2019).Long-lived high-frequency gravity waves in the atmospheric boundary layer: Observations and simulations.Atmospheric Chemistry and Physics,19(24).
MLA	Jia M.,et al."Long-lived high-frequency gravity waves in the atmospheric boundary layer: Observations and simulations".Atmospheric Chemistry and Physics 19.24(2019).