基于卫星观测的连云港臭氧总量时空特征研究

Temporal and Spatial Characteristics of Total Column Ozone in Lianyungang Based on Satellite Observations

本文利用卫星观测的臭氧总量数据,分析连云港臭氧总量时空分布特征,以及与近地面臭氧的时空分布比较。结果表明,连云港市臭氧总量基本呈现纬向分布,同时臭氧总量从北向南呈递减趋势。从全市年均分布上看,赣榆区臭氧总量是最高的。从全市臭氧总量月均变化上看,高值集中出现在3~5月份。最高值在4月份,最小值出现在10月份。连云港市臭氧总量在春季达最高值,夏季次之,秋季为最小值。县区臭氧总量月变化和季节变化与全市相一致。卫星观测的臭氧总量与近地面臭氧相比,在空间分布上臭氧总量变化趋势与县区臭氧浓度变化基本一致。无论从臭氧总量上看,还是从近地面臭氧浓度上看,赣榆区是最高的,灌南县是最低的。从月均变化和季节变化上看,臭氧总量与近地面臭氧变化趋势并不一致。臭氧总量在4月份达到最高值,而近地面臭氧浓度在6月份达到最高值。臭氧总量在春季达到最高值,秋季为最低值。而近地面臭氧浓度在夏季达到最高值,冬季达到最低值。

In this paper,the total ozone data observed by satellite are used to analyze the temporal and spatial distribution characteristics of the total ozone in Lianyungang,and the comparison with the near surface ozone.The results show that total column ozone in Lianyungang basically presents a zonal distribution,and the total amount of ozone decreases from north to south.From the annual average distribution of the city,Ganyu has the highest total ozone.From the perspective of the monthly average change of the total amount of ozone in the city,the high value concentrated in March May.The highest value is in April,and the lowest value is in October.The total amount of ozone in Lianyungang City reached the highest value in spring,followed by summer,and the lowest value in autumn.The monthly and seasonal changes of total ozone in the county are consistent with those in the whole city.Compared with the near surface ozone,the total ozone observed by satellite has the same trend in spatial distribution as the ozone concentration in the county.In terms of total column ozone and ozone concentration near the ground,Ganyu is the highest and Guannan is the lowest.From the perspective of monthly and seasonal changes,the trend of total ozone is not consistent with that of near surface ozone.The total column ozone reached the highest value in April,while the near surface ozone concentration reached the highest value in June.The total ozone reached the highest value in spring and the lowest value in autumn.The ozone concentration near the ground reaches the highest value in summer and the lowest value in winter.