摘要
为了探寻适用于中国地区的颠簸定量诊断方法以及分析颠簸的特征,利用飞机观测资料和ERA-Interim再分析资料,结合多种评估指标对比分析了7种飞机颠簸指数在中国地区的诊断效果。根据对比结果选取诊断效果较好的3种指数,利用ERA-Interim资料统计分析了1981-2015年中国地区发生中度及以上(MOG)飞机颠簸的时空分布特征。结果表明:(1)指数评估指标对不同指数的阈值变化的敏感程度不同;(2)不同颠簸指数的诊断效果之间存在较大的差异,布朗指数在中国地区的诊断效果最好;(3)中国地区飞机颠簸主要发生在400-200hPa;(4)中国中东部地区是颠簸高发区,且高发区位置、范围和中心频率均有明显的季节变化;(5)中国地区飞机颠簸具有一定的年际变化特征。
Based on aircraft reports and ERA-Interim reanalysis data,a comparative analysis of the diagnostic effect of 7 turbulence indexes is conducted by using multiple evaluation indicators in order to explore the effective quantitative diagnosis methods of turbulence in China.According to the comparative results,three indexes with better performances are selected to make a statistical analysis of the spatial and temporal distribution characteristics of moderate and greater(MOG) aircraft turbulence in China during 1981-2015 by using the ERA-Interim data.The results indicate that:(1)The assessment indicators have different sensitivity to the changes of thresholds of different indexes;(2) The diagnostic effects of different turbulence indexes have obvious differences,and Brown Index has the best diagnostic effect in China;(3) Turbulence in China mainly occurs between 400-200 hPa;(4) Mid-eastern China is a high incidence area of turbulence,the position,range and frequency of high incidence area have obviously seasonal changes;(5) The aircraft turbulence in China has interannual characteristics.
作者
徐佳男
王东海
巩远发
段月
XU Jia-nan;WANG Dong-hai;GONG Yuan-fa;DUAN Yue(Chengdu University of Information Teehnology,Chengdu 610225,China;School of Atmospheric Science,Sun Yat-Sen University, Guangzhou 510275,China)
出处
《成都信息工程大学学报》
2018年第6期704-712,共9页
Journal of Chengdu University of Information Technology
基金
民航空管系统科技资助项目(2017XZ-084)
关键词
气象学
航空气象
飞机颠簸
颠簸指数
对比分析
分布特征
meteorology
aviation meteorology
aircraft turbulence
turbulence index
comparative analysis
distribution characteristics
