极地研究

• 研究快报 • 上一篇    

A new method of measuring optical turbulence of atmospheric surface layer at Antarctic Taishan Station with ultrasonic anemometer

WU Xiaoqing1*, TIAN Qiguo2, JIANG Peng3, CHAI Bo2, QING Chun1,4, CAI Jun1,4, JIN Xinmiao2 & ZHOU Hongyan2,3   

  1. 1 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Science, Hefei 230031, China;
    2 Polar Research Institute of China, Shanghai 200136, China;
    3 University of Science and Technology of China, Hefei 230026, China;
    4 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230031, China
  • 出版日期:1965-12-30 发布日期:1965-12-30
  • 通讯作者: WU Xiaoqing

A new method of measuring optical turbulence of atmospheric surface layer at Antarctic Taishan Station with ultrasonic anemometer

WU Xiaoqing1*, TIAN Qiguo2, JIANG Peng3, CHAI Bo2, QING Chun1,4, CAI Jun1,4, JIN Xinmiao2 & ZHOU Hongyan2,3   

  1. 1 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Science, Hefei 230031, China;
    2 Polar Research Institute of China, Shanghai 200136, China;
    3 University of Science and Technology of China, Hefei 230026, China;
    4 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230031, China
  • Online:1965-12-30 Published:1965-12-30
  • Contact: WU Xiaoqing

摘要: To find the optimal location for large-aperture telescopes is a goal of astronomy. Chinese Antarctic astronomy has begun to flourish in recent years, and it is an urgent need in basic astronomical work to measure and analyze the optical turbulence spatiotemporal distribution in the Antarctic region. We analyzed turbulence data measured by a mobile atmospheric parameter measurement system from 30 December 2013 to 10 February 2014 at Antarctic Taishan Station. Because there is a discrepancy between the refractive index structure constant Cn2 measured by an ultrasonic anemometer with a single-point temperature structure function method and by micro-thermometer, a new method to measure Cn2 with a temperature spectrum method is proposed herein. Through comparing long-term continuous Cn2 data derived from ultrasonic anemometer with those via the new method and micro-thermometer, trend, magnitude and measured weak turbulence of ~2×10-16m-2/3 are generally satisfactory. The reason for the discrepancy inCn2 measurement between the ultrasonic anemometer with the old method and micro-thermometer is investigated.

关键词: optical turbulence, ultrasonic anemometer, temperature spectrum method, Antarctic Taishan Station

Abstract: To find the optimal location for large-aperture telescopes is a goal of astronomy. Chinese Antarctic astronomy has begun to flourish in recent years, and it is an urgent need in basic astronomical work to measure and analyze the optical turbulence spatiotemporal distribution in the Antarctic region. We analyzed turbulence data measured by a mobile atmospheric parameter measurement system from 30 December 2013 to 10 February 2014 at Antarctic Taishan Station. Because there is a discrepancy between the refractive index structure constant Cn2 measured by an ultrasonic anemometer with a single-point temperature structure function method and by micro-thermometer, a new method to measure Cn2 with a temperature spectrum method is proposed herein. Through comparing long-term continuous Cn2 data derived from ultrasonic anemometer with those via the new method and micro-thermometer, trend, magnitude and measured weak turbulence of ~2×10-16m-2/3 are generally satisfactory. The reason for the discrepancy inCn2 measurement between the ultrasonic anemometer with the old method and micro-thermometer is investigated.

Key words: optical turbulence, ultrasonic anemometer, temperature spectrum method, Antarctic Taishan Station