物理学报2017，Vol.66Issue(3)：407-416,10.DOI:10.7498/aps.66.039201
常规气象参数估算南极泰山站近地面大气光学湍流强度
Estimating optical turbulence of atmospheric surface layer at Antarctic Taishan station from meteorological data
摘要
Abstract
Turbulence intensity in the near-surface layer and its decrease rate with height are closely related to the quality of potential sites. Astronomers have been pursuing a perfect astronomical site to place the large-aperture telescopes. Compared with the best mid-latitude sites, Antarctic plateau inevitably becomes an ideal site for building the next-generation large optical and infrared telescopes, which is because of its low infrared sky emission, low atmospheric precipitable water vapour content, low aerosol and dust content of the atmosphere, and light pollution. In this paper, we establish a model of the atmospheric optical turbulence in surface layer, and use it to estimate C2n at Antarctic Taishan station for the first time. The meteorological parameters of the model input are the data measured by a mobile atmospheric parameter measurement system at Antarctic Taishan station from 30 December 2013 to 10 February 2014. The values of C2n, estimated by the model and measured by a micro-thermometer, are compared. Sensitivity analysis of the estimation method is also carried out. The measurement results and analyses show that C2n obtained at Taishan station has obvious diurnal variation characteristics, with well-behaved peaks in the daytime and nighttime, and minima near sunrise and sunset. C2n obtained in the nighttime is stronger than that in daytime, more specifically, it is on the order of 2 × 10?14 m?2/3. The comparison between model predictions and experimental data demonstrates that it is feasible to estimate C2n in Antarctic by using this model. The biggest differences between C2n values obtained from the model and measurement usually emerge at sunrise and sunset, respectively. Considering the fact that Antarctic atmosphere is in a stable state most of the time, the values of C 2n estimated by different nondimensional structure parameter functions are nearly the same. Thus, the measurement accuracy of air temperature difference from one height to another is the main factor that affects the estimated value of C2n.关键词
南极天文/光学湍流/估算方法/敏感性分析Key words
Antarctic astronomy/optical turbulence/estimating method/sensitivity analysis引用本文复制引用
吴晓庆,田启国,金鑫淼,姜鹏,青春,蔡俊,周宏岩..常规气象参数估算南极泰山站近地面大气光学湍流强度[J].物理学报,2017,66(3):407-416,10.基金项目
国家自然科学基金(批准号: 41275020, 41576185, 11503023)、中国极地研究中心极地科学青年创新基金(批准号: CX20130201)、上海市自然科学基金(批准号: 14ZR1444100)和中国极地环境综合考察与评估项目(批准号: CHINARE-2013-02-02, CHINARE-2014-02-03)资助的课题. Project supported by the National Natural Science Foundation of China (Grant Nos. 41275020, 41576185, 11503023), the Polar Science Innovation Fund for Young Scientists of Polar Research Institute of China (Grant No. CX20130201), the Shanghai Natural Science Foundation, China (Grant No. 14ZR1444100), and the Chinese Polar Environment Comprehensive Investigation and Assessment Programs (Grant Nos. CHINARE-2013-02-02, CHINARE-2014-02-03). （批准号: 41275020, 41576185, 11503023）
