中国地区近十年颠簸类航空器空中报告统计

A Statistical Analysis of Aircraft Turbulence Pilot Reports in China in Past Decade

本文选取2011-2018年中国地区总计11137份颠簸类话音方式航空器空中报告(PIREPs)进行统计。研究发现,中国地区PIREPs年平均份数在冬季最多、夏季最少,其中峰值出现在2月、谷值出现在7月。所有PIREPs中,中度颠簸和严重颠簸占比较大(合计超过95%),两者之间的比例为1.8:1。就颠簸报告高度而言,高高度(>6000 m)、中高度(>3000、≤6000 m)、低高度(≤3000 m)比例为3.8:1.5:1。以我国民航业区域划分方式为标准,华北地区颠簸类PIREPs最多,其次为中南地区;西北和东北地区最少。PIREPs中各强度、高度颠簸的发生比例也具有一定年际变化趋势,其中中度颠簸占比逐渐下降、严重颠簸占比逐渐上升;2014年前高高度颠簸占比上升、中高度和低高度颠簸占比下降,2016年后高高度和中高度颠簸占比的年际趋势出现逆转。

In this paper,the spatial-temporal characteristics of aircraft turbulence in China are analyzed base on 11,137 PIREPs from 2011 to 2018.The results show that turbulence PIREPs is most in winter and least in summer,with the peak in February and the valley in July.The ratio of moderate and severe turbulence is 1.8:1.According to the occurrence height of turbulence,the ratio of high(>6000m),middle(>3000m,<6000m)and low(<3000m)PIREPs is 3.8:1.5:1.PIREPs were reported in North China mostly,followed by Central and Southern China,while Northwest and Northeast China account for the least.There is an inter-annual trend in the proportion of different intensity and height turbulence,among which moderate turbulence decrease and severe turbulence increase.Before 2014,high altitude turbulence increase,middle and low altitude turbulence decrease.After 2016,the trend of high and middle altitude turbulence reversed.