21 Mar 2022
21 Mar 2022
Status: a revised version of this preprint is currently under review for the journal AMT.

Average visibility that has been miscalculated

Zefeng Zhang, Hengnan Guo, Hanqing Kang, Jing Wang, Junlin An, Xingna Yu, Jingjing Lv, and Bin Zhu Zefeng Zhang et al.
  • Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China

Abstract. Visibility data are fundamental meteorological data widely used in many fields such as climate change, atmospheric radiation, atmospheric pollution, and environmental health. Calculating the average visibility is typically the first step when using visibility data. However, this study proves that the algorithm previously used to calculate average visibility is incorrect, leading to a non-negligible error in average visibility data. Moreover, the use of this incorrect algorithm not only artificially reduces the reliability of visibility data, but also affects the credibility and even the correctness of the conclusions reached in previous studies using visibility data. Therefore, we present the correct algorithm for average visibility, which should be applied to both future and previous research to significantly increase the reliability and application scope of visibility data.

Zefeng Zhang et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2022-74', Anonymous Referee #1, 01 Apr 2022
  • RC2: 'Comment on amt-2022-74', Anonymous Referee #2, 07 Apr 2022

Zefeng Zhang et al.

Zefeng Zhang et al.


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Short summary
1. This study proves that the algorithm that has been used to calculate the average visibility is incorrect, causing a non-negligible error. 2. The correct algorithm for average visibility is proposed in this study. 3. Not only should the correct algorithm be used in the future, but also the past visibility data should be revised.