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Based on the radiative transfer simulation and analysis of observational data on cloudiness, temperature, and humidity in the Arctic atmosphere in the years of the increased ice melting, a hypothesis is proposed on the effect of thin high clouds and aerosol layers on the heating and dissipation of low-level clouds in the Arctic. Along with the effect of thin high scattering layers on the transmission of solar radiation by tropospheric clouds, the dissipation of low-level clouds in the years of the increased ice melting can be one of the main mechanisms of the natural warming in the Arctic.