环北京地区积层混合云微物理结构飞机联合探测研究

利用北京、山西和河北三省市飞机在环北京地区探测的积层混合云微物理结构特征资料,结合卫星等宏观观测资料,分析了环北京地区积层混合云系空间云微物理结构特征。结果显示,冷锋云系前部,云内部微物理参数空间分布不均匀,2700m以上较大,垂直方向云粒子浓度和直径呈正相关关系,浓度极值间差7个量级,大滴粒子浓度差7个量级,降水粒子浓度差6个量级,水平方向云粒子浓度和直径分布不均匀,呈反相关关系。冷锋云系中部,云微物理参数垂直分布不均匀,在2500～3600m和4000m以上高度层出现云粒子峰值,且云粒子浓度和直径呈反相关关系,云滴粒子浓度极值间差6个量级,大滴粒子浓度差7个量级,降水粒子浓度差5个量级,水平方向云粒子分布不均匀,云粒子浓度和直径呈反相关关系。冷锋云系前部,云粒子谱在4800m高度谱型为单峰谱,4200m高度谱型多峰分布,3600m高度谱型为双峰谱。云降水粒子谱三高度层谱型差异不大,4800m高度谱型为单调递减谱,峰值在小粒子端（≤100μm）,4200m和3600m高度谱型相似,为双峰谱,峰值分别在≤小于100μm和230μm处。降水粒子谱三高度层谱型相似,都为单峰谱,峰值相差不大。冷锋云系中部,云粒子谱在三高度层谱型差异较大,4800m高度谱型为单峰谱,峰值在小滴端,4200m高度谱型为单峰谱,峰值在15μm处,3600m高度谱型为双峰谱,峰值分别在7μm和30μm处。云降水粒子谱三高度层谱型差异不大,4800m高度谱型为单调递减谱,峰值在小粒子端（≤100μm）,4200m和3600m高度谱型相似,为双峰谱,峰值分别在≤100μm和200μm处。降水粒子谱三高度层谱型相似,都为单峰谱,峰值相差不大。

Microphysical structures of stratocumulus mixed cloud detected by aircraft around Beijing area

Based on the satellite data and stratocumulus mixed cloud microphysical data measured by three airplanes in Beijing,Shanxi and Hebei,the stratocumulus mixed cloud spatial microphysical structure characteristics around Beijing area are analyzed.The results show that the spatial distribution of cloud microphysical parameters in front of cold front is non-uniform,it is bigger above 2 700 m,the vertical particles concentration and diameter is inverse correlation,the extreme of cloud particles concentration has 7 orders of magnitudes,the differnce of big particles concentration is 7 magnitudes,the difference of precipitation particles is 6 magnitudes.Cloud particles concentration and diameter in horizontal is un-uniform and anticorrelation.The vertical cloud microphysical parameters in middle of cold front are un-uniform and the peak values appears in 2 500—3 600 m and above 4 000 m.The concentration and diameter of cloud particles present inverse correlation,the extreme difference of cloud particles concentration is 6 magnitudes,the difference of big particles concentration is 7 magnitudes,the difference of precipitation particles is 5 magnitudes.The cloud particles concentration and diameter in horizontal is un-uniform,presenting inverse correlation.The cloud particles spectrum is unimodal in front of cold front on 4 800 m,multimodal on 4 200 m and bimodal on 3 600.The cloud precipitation particles spectrum is monotone decreasing on 4 800 m,peak value is in droplet（≤100 μm）.The spectrum patterns on 4 200 m and 3 600 m are bimodal,the peak value are separately in 100 μm and 230 μm.The precipitation particles spectrum patterns on three layers are unimodal and the peak values are similar.The cloud particles spectrum patterns on three layers in the middle of cold front appears a big difference.The spectrum patterns on 4 800 m and 4 200 m are unimodal while peak values appear in droplet and 15 μm,separately.The spectrum patterns on 3 600 m is bimodal,peak values are in 7 μm and 30 μm,separately.The cloud precipitation spectrums on three height layer is a little differece.It is monotone decreasing spectrum on 4 800 m,peak value appears in droplet（≤100 μm）.The spectrums are bimodal on 4 200 m and 3 600 m,peak values appear in less than 100 μm and 200 μm,separately.The precipitation spectrums on three layers are similar.They are unimodal.