基于OMI 的中国区域2005–2020 年间臭氧柱总量随经纬度变化特性研究

利用 OMI 每日 L3 级 O3 柱总量数据对中国区域 2005–2020 年间臭氧柱总量变化趋势开展研究, 构建了相 关数据库, 并基于数据筛选和数据挖掘分析了该期间中国区域臭氧柱总量与纬度和经度的相关性。结果表明, 在 2005–2020 年间, 中国区域上空的臭氧柱总量随纬度增大而增大, 而其与经度的关系受纬度值影响。当纬度大于特定 阈值时, 臭氧柱总量随经度增大而增大; 而当纬度小于该值时, 臭氧柱总量由西向东基本保持稳定。研究结果对于揭 示中国区域臭氧柱总量变化规律、进一步分析全球臭氧变化趋势具有重要意义。

Variation Characteristics of Total Ozone Column Amount with Latitude and Longitude in China from 2005 to 2020 Based on OMI

The trend of total ozone column amount in China from 2005 to 2020 is studied with OMI daily Level-3 ozone column data products. By constructing the relevant database, the correlation between China′s regional total ozone column density and latitude and longitude is analyzed based on data searching and data mining methods. The results show that the total ozone column amount over China increases with the increase of latitude from 2005 to 2020, and its relationship with longitude is affected by latitude. When the latitude is greater than a certain threshold, the total ozone column amount increases with the increase of longitude, and when the latitude is less than this value, the total ozone column amount basically remains stable from West China to East China. The results are of great significance to reveal the variation of total ozone column amount in China and to further analyze the change trend of global ozone.