地形和天气形势对临汾市大气污染的影响
裴坤宁, 王雁, 闫世明, 蒋云盛, 郭伟

Influence of topography and weather situation on air pollution in Linfen City
PEI Kunning, WANG Yan, YAN Shiming, JIANG Yunsheng, GUO Wei
图2 临汾市24次污染过程轨迹向后推延12 h(a)、24 h(b)、48 h(c)、60 h(d)的气流后向轨迹聚类图
Fig.2 Cluster diagram of backward trajectory of air flow with the backward delay time of 12 h (a), 24 h (b), 48 h (c) and 60 h (d) for 24 pollution processes in Linfen City