Analysis of wind-speed profiles and optical turbulence above Gaomeigu and the Tibetan Plateau using ERA5 data

doi:10.1093/mnras/staa2960

HFCAS OpenIR

	Analysis of wind-speed profiles and optical turbulence above Gaomeigu and the Tibetan Plateau using ERA5 data
	Han, Yajuan 1,2,3; Yang, Qike 1,2,3; Liu, Nana 1,3,4; Zhang, Kun 1,3,4; Qing, Chun 1,3; Li, Xuebin1,3 ; Wu, Xiaoqing1,3 ; Luo, Tao 1,3
	2021-03-01
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
通讯作者	Wu, Xiaoqing(xqwu@aiofm.ac.cn) ; Luo, Tao(luotao@aiofm.ac.cn)
摘要	Appropriate knowledge of wind-speed distributions and optical turbulence at existing and potential astronomical observatories is crucial for siting ground-based telescopes and applying adaptive optics (AO) systems. In this paper, the wind-speed and optical-turbulence characteristics above Gaomeigu and the Tibetan Plateau are studied by employing the 20-yr (1999-2018) European Centre for Medium-Range Weather Forecasts' fifth set of reanalysis data (ERA5). First, the meteorological parameters derived from ERA5 data are evaluated with coinciding radiosonde measurements. Results show that the meteorological parameters of ERA5 data in the free atmosphere have quite good reliability, with bias and root mean square error basically lower than 1.2 K in temperature and basically smaller than 2 m s(-1) for wind speed. Then, vertical distributions and seasonal behaviour of the wind speed at Gaomeigu and Lhasa station above the Tibetan Plateau are analysed. Thirdly, the Richardson number (R-i) in the free atmosphere is calculated to provides us with a map of relative probability of different periods and regions of optical turbulence being developed above the two sites. In general, the atmospheric stability of Gaomeigu is higher than that of Lhasa station. Particularly in June, for Gaomeigu, the atmospheric stability within 6-30 km a.s.l. is basically superior or equal to the stable condition found at two mid-latitude sites: Oukaimeden and La Palma. Moreover, Lhasa station has a relative higher stability during June-September than other months. Furthermore, we provide the (C-n(2)) profiles using ERA5 data at Gaomeigu and Lhasa. The results indicate that the choice of an appropriate outer-scale model is crucial for revealing local turbulence characteristics.
关键词	turbulence atmospheric effects methods: data analysis site testing
DOI	10.1093/mnras/staa2960
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[91752103] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA17010104] ; Foundation of the Key Laboratory of Science and Technology Innovation of the Chinese Academy of Sciences[CXJJ-19S028]
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of the Key Laboratory of Science and Technology Innovation of the Chinese Academy of Sciences
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000637320000003
出版者	OXFORD UNIV PRESS
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/121592
专题	中国科学院合肥物质科学研究院
通讯作者	Wu, Xiaoqing; Luo, Tao
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Anhui, Peoples R China 3.Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China 4.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
第一作者单位	中科院安徽光学精密机械研究所
通讯作者单位	中科院安徽光学精密机械研究所
推荐引用方式 GB/T 7714	Han, Yajuan,Yang, Qike,Liu, Nana,et al. Analysis of wind-speed profiles and optical turbulence above Gaomeigu and the Tibetan Plateau using ERA5 data[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,501.
APA	Han, Yajuan.,Yang, Qike.,Liu, Nana.,Zhang, Kun.,Qing, Chun.,...&Luo, Tao.(2021).Analysis of wind-speed profiles and optical turbulence above Gaomeigu and the Tibetan Plateau using ERA5 data.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,501.
MLA	Han, Yajuan,et al."Analysis of wind-speed profiles and optical turbulence above Gaomeigu and the Tibetan Plateau using ERA5 data".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 501(2021).