基于无人机垂直观测的眉山市臭氧污染个例对比分析

doi:10.3969/j.issn.1673-503X.2024.03.003

Abstract

Abstract:

In order to better understand the concentration distribution of O₃ in the lower troposphere and the influence of meteorological factors on O₃ pollution, this paper used UAV (Unmanned Aerial Vehicle) to observe O₃ concentration vertically, air temperature and relative humidity in Meishan city from June 27 to 30 and July 6 to 12, 2022, and combines the weather situation, ground meteorological elements and HYSPLIT's 48 h backward trajectory to compare and analyze the two processes from the near surface and vertical direction, respectively. The results showed that the daily variation of O₃ concentration was obvious, the valley value near surface appeared at 06:00-08:00, and began to increase significantly around 10:00, then reaching a peak during 12:00-20:00. While the average concentration of O₃ in the vertical direction was lowest at 10:00 and rapidly enhanced at 12:00, fell slightly at 16:00 and peaked at 20:00. When the concentration of O₃ near surface is high, the corresponding average vertical concentration is also higher; while the concentration of O₃ near surface is higher than that in the vertical direction, and the concentration of O₃ in the 0~1000 m increases slightly and then decreases, and the peak mostly appears in the height of 0~300 m above the ground. The correlation between O₃ concentration and meteorological elements was significantly higher during the day than that during the night, positively correlated with temperature, negatively correlated with relative humidity and pressure, and positively correlated with wind speed, while the correlation between O₃ concentration and relative humidity in the vertical direction was significantly different at different observation times.

Key words: O₃ pollution, Unmanned Aerial Vehicle (UAV), Vertical distribution

CLC Number:

Jinglan LUO, Chao HU, Dongmin TANG, Xueqin PENG, Yike GAO. Comparative analysis of ozone pollution cases in Meishan city based on unmanned aerial vehicle vertical observation[J]. Journal of Meteorology and Environment, 2024, 40(3): 17-25.

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References 18

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日期	时段	气压	温度	相对湿度	降雨量	风速
6月27—30日	白天	-0.644^**	0.848^**	-0.852^**	a	0.412^**
6月27—30日	夜间	0.010	-0.008	-0.279	0.130	0.374^**
7月6—12日	白天	-0.329^**	0.790^**	-0.592^**	a	0.276^*
7月6—12日	夜间	-0.265^*	0.773^**	-0.532^**	a	0.591^**

日期	10时		12时		16时		20时		22时
日期	温度	相对湿度	温度	相对湿度	温度	相对湿度	温度	相对湿度	温度	相对湿度
6月27日	—	—	0.950^**	0.953^**	—	—	0.058	0.961^**	—	—
6月28日	—	—	0.981^**	0.814^**	0.957^**	0.819^**	0.938^**	0.757^**	—	—
6月29日	0.942^**	0.905^**	0.935^**	-0.657^**	0.942^**	0.905^**	0.925^**	0.650^**	0.909^**	0.262
6月30日	—	—	—	—	0.863^**	0.950^**	0.956^**	0.633^**	0.956^**	0.633^**
7月6日	—	—	0.993^**	0.840^**	0.990^**	0.690^**	0.989^**	0.000	0.965^**	0.946^**
7月7日	—	—	0.984^**	0.567^**	0.945^**	-0.714^**	0.990^**	0.176	0.753^**	-0.548^**
7月8日	0.935^**	0.875^**	0.926^**	-0.228	0.932^**	0.112	0.842^**	0.378^**	0.945^**	0.387^**
7月9日	0.812^**	0.519^**	0.938^**	-0.351^*	0.902^**	-0.747^**	0.868^**	0.066	0.886^**	-0.060
7月10日	—	—	0.901^**	-0.815^**	0.922^**	-0.773^**	0.950^**	-0.152	—	—
7月11日	—	—	0.970^**	0.929^**	0.879^**	-0.648^**	0.913^**	0.108	—	—
7月12日	—	—	—	—	0.971^**	-0.571^**	-0.174	-0.571^**	—	—

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Comparative analysis of ozone pollution cases in Meishan city based on unmanned aerial vehicle vertical observation

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