Vol. 38, issue 06, article # 3
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Abstract:
Atmospheric aerosol affects astronomical observations performed in the visible spectral range (400−700 nm). Therefore, information on the dynamics of the optical properties of the medium in the area of an astrophysical experiment is necessary for the correct interpretation of the results. Due to the lack of local measurements, data on the state of the atmosphere can be obtained, for example, from numerical simulation. The paper discusses the results of AOD simulation using the GEOS-CHEM chemical transport model and CAMS chemical reanalysis for the TAIGA gamma-ray observatory area, where EAS Cherenkov radiation is recorded at night. It is shown that the average AOD value (550 nm) for the period from September to April in 2019–2022 according to GEOS-CHEM and CAMS data are ~ 0.08 and ~ 0.05, respectively. The AOD maximum is observed in April and can attain 0.6. Verification of the simulation results using AERONET data showed their satisfactory agreement: the correlation coefficient is 0.92 for GEOS-CHEM and 0.91 for CAMS. Thus, the results of GEOS-CHEM and CAMS can be used at the stage of processing the experimental data of the TAIGA gamma-ray observatory, as well as similar astrophysical projects.
Keywords:
AOD, simulation, GEOS-CHEM, CAMS, TAIGA gamma-ray observatory
References:
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