A method and system for estimating PM2.5 concentration

Abstract

The invention discloses a PM2.5 concentration estimation method and system. The PM2.5 concentration estimation method comprises the steps of receiving satellite remote sensing data transmitted by a satellite, and obtaining an aerosol optical depth AOD according to the satellite remote sensing data; obtaining weather forecast data from a global weather forecast system GFS, and obtaining the atmospheric boundary layer height HPBL and the near-surface relative humidity RH according to the weather forecast data; obtaining PM2.5 data collected by a ground station; performing space matching on the PM2.5 data, the AOD, the HPBL and the RH on the same time point according to geographic position information of the ground station; building a geographically weighted regression model according to the PM2.5 data, the AOD, the HPBL and the RH obtained after space matching, and estimating the PM2.5 concentration according to the geographically weighted regression model. Space matching is performed on the AOD, the HPBL, the RH and the PM2.5 data collected by the ground station by introducing the HPBL and the RH in the weather forecast data so as to estimate the PM2.5 concentration inside a region. Compared with the prior art, the method and system have the advantage of being high in estimation precision.

Description

Technical field [0001] The invention relates to the field of atmospheric environment remote sensing monitoring, in particular to a PM 2.5 Concentration estimation method and system. Background technique [0002] As a major air pollutant, the impact of aerosol particles on public health is a recognized fact, which directly threatens human survival and sustainable development. Among them, fine particulate matter PM 2.5 (Particles with an aerodynamic diameter of less than 2.5μm) can reach the alveolar area xx of the human body, and particles with a diameter of less than 5μm can reach the alveolar area xx. Some smaller particles can even enter the human blood circulatory system through capillaries. Cardiovascular causes greater harm. In 2012, the United Nations Environment Program released the "Global Environment Outlook 5" that nearly 2 million premature deaths each year are related to particulate pollution. my country's atmospheric fine particulate matter (PM 2.5 Pollution is also...

AI Technical Summary

Problems solved by technology

[0004] In recent years, satellite remote sensing data has been widely used in the monitoring of particulate matter and pollutant gases, which has great application value for air quality policy formulation and air pollution forecasting; however, the regional scale near-surface PM 2.5 Concentrations face substantial uncertainty and have limited temporal and spatial applicability

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