不同路径冷空气导致的宁夏沙尘重污染天气特征及传输规律
袁瑞瑞, 王建英, 张卫红, 张肃诏, 王坤, 雍佳

Characteristics of heavy dust pollution weather coused by cold air with different routes in Ningxia, China
Ruirui Yuan, Jianying Wang, Weihong Zhang, Suzhao Zhang, Kun Wang, Jia Yong
图3 2018—2021年宁夏各环流型出现频率及F1/F2值分布
Fig.3 The percentage of circulation types and F1/F2 values in Ningxia from 2018 to 2021