Abstract

Seasonal and interannual variations of the aerosol optical depth (AOD) and the total carbon monoxide content in the atmospheric column have been determined by measurements of the MODIS and Measurements of Pollution in the Troposphere (MOPITT) instruments of the Terra satellite for several cities of Irkutsk oblast and Buryatia with a high level of atmospheric pollution for 2010–2021. For Irkutsk, a decrease in AOD interannual value from 0.278 in 2012 to 0.14 in 2020 with a general negative trend is shown. However, in 2021, the interannual AOD value for Irkutsk increased to 0.22. For Irkutsk, a negative trend of interannual variations in the total CO content in the atmospheric column is shown. When comparing the long-term seasonal variations of AOD according to ground measurements by a CIMEL photometer in Tory (Buryatia) and the OMI/Aura satellite data, the proximity of AOD values for the summer and autumn seasons and a significant excess of AOD according to satellite data over ground measurements for the spring months are shown. The largest Spearman correlation coefficient between ground and satellite measurements of AOD was for 2021 (ρ_s = 0.64).

中文翻译：

---

2010-2021年伊尔库茨克州和布里亚特大气气溶胶和一氧化碳含量光学特征

摘要

通过对伊尔库茨克几个城市的 Terra 卫星的 MODIS 和对流层污染测量 (MOPITT) 仪器的测量，确定了气溶胶光学深度 (AOD) 和大气柱中一氧化碳总含量的季节和年际变化2010-2021 年大气污染程度较高的州和布里亚特。伊尔库茨克市AOD年际值从2012年的0.278下降到2020年的0.14，总体呈现负增长趋势。然而，2021年，伊尔库茨克的年际AOD值增加至0.22。对于伊尔库茨克，大气柱中总二氧化碳含量的年际变化呈负趋势。根据托里（布里亚特）CIMEL 光度计的地面测量和 OMI/Aura 卫星数据比较 AOD 的长期季节性变化，夏季和秋季的 AOD 值接近，并且根据显示了春季月份地面测量的卫星数据。 AOD 地面和卫星测量值之间最大的 Spearman 相关系数是 2021 年（ρ _s = 0.64）。