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

文献类型：期刊论文

作者Han, Yajuan1,2,3; Yang, Qike1,2,3; Liu, Nana1,2,4; Zhang, Kun1,2,4; Qing, Chun1,2; Li, Xuebin1,2; Wu, Xiaoqing1,2; Luo, Tao1,2
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2021-03-01
卷号501
关键词turbulence atmospheric effects methods: data analysis site testing
ISSN号0035-8711
DOI10.1093/mnras/staa2960
通讯作者Wu, Xiaoqing(xqwu@aiofm.ac.cn) ; Luo, Tao(luotao@aiofm.ac.cn)
英文摘要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.
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]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000637320000003
出版者OXFORD UNIV PRESS
资助机构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
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/121591]  
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.Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China
2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, Hefei 230031, Anhui, Peoples R China
3.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Anhui, Peoples R China
4.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
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).

入库方式： OAI收割

来源：合肥物质科学研究院

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