Fine-modal aerosol parameter inversion method

Abstract

The invention discloses a fine-modal aerosol parameter inversion method. The characteristic that polarization surface reflectance basically does not change along with wave bands from visible light tonear-infrared wave bands is utilized. The characteristic of small change of polarization surface reflectance is combined. Polarization remote sensing data of the POLDER sensor is inversed to obtain the optical thickness of the fine-modal aerosol. According to the invention, fine-modal aerosol parameters and polarization surface reflectance can be effectively and simultaneously inverted, and the inverted fine-modal aerosol optical thickness has higher spatial coverage, higher spatial resolution and higher precision. The method can be used for researching small-scale fine-modal aerosol, and thecoverage degree and the precision of bright earth surfaces (cities, deserts and the like) are improved.

Description

Technical field

[0001] The invention relates to the field of air pollution control, in particular to an atmospheric aerosol observation technology. Background technique

[0002] The particle size of atmospheric aerosols generally ranges from a few nanometers to tens of microns. In order to better evaluate their impact on the global radiation balance, climate change, atmospheric environment and human health, aerosols are usually divided into fine modes and coarse modes according to their particle size. Modal aerosol. The radius of fine-mode aerosols is generally 0.1-0.2 microns, and the main source is man-made emissions. The radius of coarse-mode aerosols is generally greater than 1 micron, mainly from natural emissions. According to the fifth assessment report of the Intergovernmental Panel on Climate Change (IPCC), fine-mode aerosols have a greater impact on climate change due to their large absorption characteristics. In addition, the fine-mode aerosol is the estimated groun...

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