中南地区一次飞机颠簸的物理量场分析

Analysis of Physical Quantities Fields With An Air Turbulence in the Area of Central and Southern China

利用ERA-interim再分析资料和中南地区航空器空中报告,分析2017年2月4日20:00前后的颠簸报告位置与物理量场分布特征,结果表明:与颠簸位置对应最好的是散度场的强梯度区和温度平流的等零度线两侧,靠近涡度大值中心的强梯度区和垂直速度的大值区或大梯度区附近也容易发生颠簸,若满足以上条件的物理量场达3个或以上的区域,则容易发生严重颠簸。

Using ERA-interim reanalysis data and airborne reports from aircraft over the area of central and southern China,this work studies the distribution characteristics of locations with air turbulence reports and associated fields of physical quantities around 20:00 on February 4,2017.The result is shown as follows.Best associated with the turbulence location is the zone of strong gradients of the divergence field and both sides of a zero isotherm of temperature advection.Turbulence is also likely to occur in the zone of strong gradients next to the center of large vorticity and near large vertical velocity or large vertical velocity gradients.Air turbulence can be very serious in areas where there are three or more than three physical quantities fields meeting the conditions presented above.