Aerosol Optical Depth of the Atmosphere near TAIGA Gamma-ray Observatory According to GEOS-CHEM Chemical Model and CAMS Chemical Reanalysis

IF 0.9 Q4 OPTICS

Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI:10.1134/S1024856025700460

E. Yu. Mordvin, A. I. Revyakin, A. A. Lagutin

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Abstract

Atmospheric aerosol affects astronomical observations in the visible spectral region (400−700 nm). Therefore, information on the dynamics of optical properties of the atmosphere in the region of an astrophysical experiment is required for correct interpretation of experimental results. In the lack of local measurements, data on the state of the atmosphere can be derived, for example, from numerical simulation. The paper discusses the simulation results for AOD in the region of TAIGA gamma-ray observatory, where EAS Cherenkov radiation is recorded at night, with the use of GEOS-CHEM chemical transport model and CAMS chemical reanalysis. According to GEOS-CHEM and CAMS data, the average AODs (at a wavelength of 550 nm) over September–April in 2019–2022 were ∼0.08 and ∼0.05, respectively. The AOD maximum is observed in April and can attain 0.6. Verification of the simulation results with AERONET data shows their satisfactory agreement: the correlation coefficient is 0.92 for GEOS-CHEM and 0.91 for CAMS. Hence, the results of GEOS-CHEM and CAMS can be used for processing data from TAIGA gamma-ray observatory, as well as from similar astrophysical projects.

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基于GEOS-CHEM化学模型和CAMS化学再分析的TAIGA伽玛射线天文台附近大气气溶胶光学深度

大气气溶胶影响可见光波段（400 ~ 700 nm）的天文观测。因此，要正确地解释实验结果，就需要天体物理实验区域内大气光学性质的动态信息。在缺乏局部测量的情况下，可以从例如数值模拟中获得有关大气状态的数据。利用GEOS-CHEM化学输运模型和CAMS化学再分析，讨论了TAIGA伽玛射线观测站夜间记录EAS切伦科夫辐射区域AOD的模拟结果。根据GEOS-CHEM和CAMS数据，2019-2022年9月至4月的平均aod（波长为550 nm）分别为~ 0.08和~ 0.05。AOD最大值在4月，可达0.6。利用AERONET数据对仿真结果进行验证，结果表明两者吻合较好：GEOS-CHEM的相关系数为0.92，CAMS的相关系数为0.91。因此，GEOS-CHEM和CAMS的结果可以用于处理TAIGA伽玛射线天文台的数据，以及类似的天体物理项目。

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来源期刊

Atmospheric and Oceanic Optics OPTICS-

CiteScore

2.40

自引率

42.90%

发文量

期刊介绍： Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.