2025年沙尘入侵湖南省的污染输送分析

李巧媛, 周慧, 许霖

Analysis of pollutant transport during sandstorm invasion into Hunan Province in 2025

LI Qiaoyuan, ZHOU Hui, XU Lin

图2 2025年4月12—14日逐时PM10质量浓度（a，单位：μg·m-3）和PM2.5与PM10质量浓度比（b）的Hovm?ller图 [剖面起点为张家界（29.1°N，110.5°E），终点为郴州（25.8°N，113.0°E），蓝色实线表示PM10质量浓度最大值轨迹，红色实线表示PM2.5与PM10质量浓度比最低值轨迹]

Fig. 2 Hovm?ller diagram of hourly PM10 mass concentration (a, Unit: μg·m-3) and the PM2.5 to PM10 mass concentration ratio (b) from April 12 to 14, 2025 (The profile starts at Zhangjiajie (29.1°N, 110.5°E) and ends at Chenzhou (25.8°N, 113.0°E), the blue solid line indicates the trajectory of the maximum PM10 mass concentration, and the red solid line shows the trajectory of the minimum PM2.5 to PM10 mass concentration ratio)