激光雷达观测淮南大气SO2和NO2浓度廓线实例分析

为了初步探究淮南地区大气SO₂及NO₂的不同时空分布特征，采用自研的差分吸收激光雷达系统测得某地（淮南地区）部分月份大气SO₂及NO₂气体浓度分布廓线，并选取其中典型实例从气体水平浓度日变化、垂直浓度变化以及水平浓度月变化3个方面分析了SO₂及NO₂分布特点。结果表明，同一天夜晚时刻，SO₂及NO₂气体浓度大于下午时刻的气体浓度；SO₂及NO₂气体垂直浓度随高度增加呈递减趋势；SO₂及NO₂气体水平浓度月变化变现为冬季月份气体浓度最大，夏季月份气体浓度最小，春、秋季月份次之。SO₂及NO₂浓度变化特征是人群活动和气象条件变化共同作用的结果。

Analysis of SO2 and NO2 concentration profiles in Huainan detected by a lidar

In order to preliminarily explore the spatial and temporal distribution characteristics of SO₂ and NO₂ in the atmosphere of Huainan area, one self-developed differential absorption lidar system was used to measure the distribution profiles of SO₂ and NO₂ concentrations in the atmosphere of a certain Huainan area in some months. The typical examples were selected and the distribution characteristics of SO₂ and NO₂ were analyzed from three aspects of diurnal variation of horizontal concentration, variation of vertical concentration and monthly variation of horizontal concentration of gases. The results show that, the concentration of SO₂ and NO₂ at night on the same day was higher than that at afternoon. The vertical concentration of SO₂ and NO₂ decreased with the increase of altitude. The monthly variation of horizontal concentration of SO₂ and NO₂ gas is the highest in winter and the lowest in summer, the second in spring and autumn months. The variation of SO₂ and NO₂ concentration is the result of the interaction of population activities and meteorological conditions.