The Characteristics at the Ali Observatory Based on Radiosonde Observations
文献类型：期刊论文
| 作者 | Qian, Xuan1,2; Yao, Yongqiang2; Wang, Hongshuai2; Wang, Yiping2; Bai, Zhen3; Yin, Jia2 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 130期号:994页码:14 |
| 关键词 | site testing methods: data analysis atmospheric effects balloons Online material: color figures |
| ISSN号 | 0004-6280 |
| DOI | 10.1088/1538-3873/aae6e2 |
| 英文摘要 | As part of the conceptual and preliminary design process of the Chinese Large Telescope, we have spent the last several years measuring and statistically analyzing the atmospheric characteristics above the high Ali Observatory region, in the most western part of the Tibetan Plateau. This is the first article in a series discussing the Ali Observatory site-testing campaign, and we analyze the radiosonde data sets for the first time in that area. The profiles of precipitable water vapor (PWV), upper wind, and optical turbulence are depicted, in addition the statistical characteristics are obtained. PWV profiles in the Ali area indicate that PWV is mainly concentrated below the altitude of 12 km above mean sea level(msl), decreasing with altitude, and has seasonal variations affected by monsoons. In 2016, the median PWV at the Ali Observatory was about 2.0 mm, and less than 1.0 mm during the winter. The wind profiles show strong seasonal variations of wind speed in the troposphere, where there is a prevailing stable west wind. The median wind speed at the height of the 200hP alpha pressure level was 27 m/s in 2016, with a mean speed over 50 m/s in February and 10 m/s in August. The optical turbulence profiles also show seasonal variations, with C-n(2) values between 10(-17) m(-2/3) and 10(-18) m(-2/3) in the free atmosphere. Three turbulent layers are found at the heights around 6-8 km, 12-13 km, and 18-20 km above msl, respectively. In 2016, the median seeing was estimated to be 0.'' 35 at the Ali Observatory, and 0.'' 24 in the summer. The results suggest that very low water vapor in winter, weak upper wind, and good seeing conditions in summer are present at the Ali Observatory, yielding high infrared transparency and high sensitivity for future ground-based optical and infrared telescopes. Given the unique longitude and high altitude, the Ali Observatory might be a promising site in the northern hemisphere for astronomical observations. |
| WOS关键词 | HIGH-ALTITUDE WIND ; PRECIPITABLE WATER-VAPOR ; STATISTICS ; RADIOMETER ; FORECAST ; VELOCITY ; C-N(2) ; HANLE ; MODEL |
| 资助项目 | Chinese Academy of Sciences[XDB23020300] ; National Natural Science Foundation of China (NSFC)[U1738203] ; National Natural Science Foundation of China (NSFC)[11203044] ; National Natural Science Foundation of China (NSFC)[11473041] ; National Natural Science Foundation of China (NSFC)[11653005] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000450241000001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/23333]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Qian, Xuan |
| 作者单位 | 1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing, Peoples R China 3.Ali Meteorol Bur, 9 Cent Beijing Rd, Shiquanhe Town, Tibet, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qian, Xuan,Yao, Yongqiang,Wang, Hongshuai,et al. The Characteristics at the Ali Observatory Based on Radiosonde Observations[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2018,130(994):14. |
| APA | Qian, Xuan,Yao, Yongqiang,Wang, Hongshuai,Wang, Yiping,Bai, Zhen,&Yin, Jia.(2018).The Characteristics at the Ali Observatory Based on Radiosonde Observations.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,130(994),14. |
| MLA | Qian, Xuan,et al."The Characteristics at the Ali Observatory Based on Radiosonde Observations".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 130.994(2018):14. |
入库方式： OAI收割
来源：国家天文台
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