the main results are as follows: the dry zone and high potential area above middle-level corresponded well with dark zone in wv image, which showed the dry intrusion was obvious.
结果表明: 北京地区高低层配置符合干侵入三维模型,中层以上的干区与水汽图像的暗区相吻合, 同时配合有自高纬向低纬传播的高位涡带, 北京地区干侵入特征明显。