主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2022, Vol. 38 ›› Issue (6): 57-64.doi: 10.3969/j.issn.1673-503X.2022.06.007

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Comparative analysis of cloud forecast for top ten airports in China based on cloud diagnosis algorithms

Ji-liang XU(),Wei ZHANG,Yan-hua SU,Lei GU   

  1. Aviation Meteorological Center, Air Traffic Administration Bureau, Civil Aviation Administration of China, Beijing 100018, China
  • Received:2021-03-28 Online:2022-12-28 Published:2022-12-27

Abstract:

The 6h numerical forecast data from NCEP reanalysis data FNL were selected to calculate the cloud base height and cloud cover of the lowest layer clouds below 1500 m in the top ten airports in China using the cloud diagnosis algorithm.The corresponding airport routine weather reports were used to check the calculation results and make a comparative analysis.The results showed that regardless of cloud cover, the accuracy rate and miss rate of the C cloud cover diagnosis method (C method) were lower than those of the WR95 method and optimized WR95 method (WR95opt) in most airports.The TS score of WR95 and WR95opt in Beijing, Shanghai Pudong, Kunming, and Shanghai Hongqiao is slightly higher than that of the C method, while in Chengdu, Xi'an, and Chongqing it is lower than that of the C method.While considering cloud cover, the calculation results from these methods are poor, the accuracy and TS score decrease, and the miss ratio increases.The calculation results of the C method for sparse cloud and above cloud are worse than that of less cloud.The relative error difference of cloud height calculated by each method is large, and the relative error spreads in both positive and negative.The calculation result of WR95opt in Beijing, Shanghai Pudong, Guangzhou, Shenzhen, Shanghai Hongqiao, Hangzhou, and Kunming is better, the calculation result of WR95 in Chengdu is better, and the calculation result of C method in Xi'an and Chongqing is better.

Key words: Cloud cover, TS scores, Relative error

CLC Number: