Research progress on atmospheric aerosol optical properties and radiation effects of Hefei Research Institute

Research progress on atmospheric aerosol optical properties and radiation effects of Hefei Research Institute

Recently, the scientific team of the Lidar Technology Research Center of the Atmospheric Optics Research Center of the Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei Institute of Material Science, has studied the seasonal variations of atmospheric aerosol optical properties, the characteristics of daily changes, and their calculation of radiative forcing. Influence the systematic study and made some new progress. The study has a certain reference value for the evaluation of radiation effects in polluted areas. Relevant results were published on July 20, 2015 and May 28, 2014 at Atmos. Meas. Tech. (2015, 8, 2901-2907) and the American Geophysical Association (AGU), published by the European Earth Science Association (EGU). Published by J. Geophys. Res. Atmos. (2014, 10, 6128-6139).

Aerosol is not only one of the main components causing air pollution, but also an important radiative forcing factor that affects the radiation balance of the ground-gas system. Aerosols can affect the climate through their direct radiative forcing and indirect effects. That is, on the one hand, aerosol particles directly diffuse and absorb solar radiation, which directly causes the solar radiation energy absorbed by the atmosphere, the solar radiation energy reaching the ground, and the solar radiation energy reflected from the top of the atmosphere back to the atmosphere. On the other hand, the presence of aerosol particles can change the physical and microphysical characteristics of the cloud and thus change the radiation characteristics of the cloud, affecting the distribution of solar energy in the earth-atmosphere system. Because aerosols are composed of substances with different spectral distributions, shapes, chemical compositions, and optical properties, the aerosol concentration can vary by several orders of magnitude in time and space. As a result, the uncertainty of the current assessment of the radiation effects of aerosols remains large.

Researchers used experimental observation data to analyze the optical microphysical properties of atmospheric aerosols in Hefei area and obtained the seasonal statistics of aerosols in the Hefei area. It was revealed that atmospheric aerosols in Hefei area have large optical thickness in summer, large particles in spring, and winter absorption. Scientific facts such as sexuality; further assessment of aerosol radiative forcing effects and influencing factors in Hefei area, the results show that the daily changes of aerosol optical characteristics in the polluted areas are large, usually using the daily average as the input parameter for radiation effect assessment will cause more than 10% Relative deviation. Therefore, for highly polluted areas, it is advisable to use long-term high-time-resolved instantaneous measurements to evaluate radiation effects.

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