Contribution to the wavelength dependence of solar aureole by using long-term record of aerosol optical properties

We investigated the long-term record of aerosol optical properties at ground-based and maritime measurements since 1990's by using the Sky radiometer (POM-01, 02: PREDE Co. Ltd., Tokyo, Japan.). One of the objectives was to understand the effect on earth climate change, and the other was to validate satellite and numerical models. Direct solar and indirect radiation measurements from the ground and sea have been successfully employed for aerosol optical properties (Aerosol optical thickness at each wavelength, Ångström exponent, Single scattering albedo at each wavelength, etc.) and size distribution of volume. These data have revealed various events (anthropogenic and/or natural aerosols), seasonal and long-term trends. However, there are still some things to consider in different observation environments (urban and rural, mountainous, oceanic, coastal, etc.) and different climatic conditions (polar to tropical), such as changes in surface albedo and atmospheric conditions, which are also related to spatial and temporal representation. Based on the validation of satellite (e.g., GCOM-C/SGLI, JAXA), we are conducting different research (atmosphere, Ocean, Cryosphere, Land) to proposals for next validation and analysis, focusing on the wavelength dependence of optical properties. We provide the possibility to the wavelength dependence of solar aureole, in this presentation, on the aerosol optical properties measurements with temporal and spatial variability in the long-term record.