A simple estimation model of aerosol optical thickness based on meteorological station observed atmospheric visibility

Zhu Li; Jianyu Chen; Shaoqi Gong; Zhihua Mao; Zengzhou Hao

doi:10.1117/12.2023228

24 September 2013 A simple estimation model of aerosol optical thickness based on meteorological station observed atmospheric visibility

Zhu Li, Jianyu Chen, Shaoqi Gong, Zhihua Mao, Zengzhou Hao

Author Affiliations +

Proceedings Volume 8869, Remote Sensing and Modeling of Ecosystems for Sustainability X; 88690S (2013) https://doi.org/10.1117/12.2023228
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Aerosol optical thickness (AOT) and atmospheric visibility are two important weather parameters. AOT reflects the state of the atmosphere,-and atmospheric visibility is widely used in various aspects of social life. Generally, it is reported in literatures that both of them are affected by Air Pollutants and other meteorological factors, such as surface pressure, ground temperature, wind speed, precipitation. In this paper, a statistic relationship expression is established between AOT and atmospheric visibility on the basis of the point-to-point meteorological observations. In the national region, the correlation between atmospheric visibility and weather factors indicates that the surface pressure has great influence on atmospheric visibility all the year round. And the influence based on precipitation is more obvious in spring and summer, mean-while wind speed and temperature play important roles in autumn and winter. A significant positive correlation was found between AOT and API. To express the relationship between atmospheric visibility and AOT, some computable models were utilized. According to the accuracy analysis, the cubic curve model and the power function model are more accurate. And both RMSE (root-mean-square error) of them is higher than 0.47. But the coefficient of cubic curve is more complex in practice. Finally, a simple estimation model of aerosol optical thickness based on meteorological station observed atmospheric visibility was conducted using power function. The Pearson coefficient between calculation of power function and observation is 0.73.

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Zhu Li, Jianyu Chen, Shaoqi Gong, Zhihua Mao, and Zengzhou Hao "A simple estimation model of aerosol optical thickness based on meteorological station observed atmospheric visibility", Proc. SPIE 8869, Remote Sensing and Modeling of Ecosystems for Sustainability X, 88690S (24 September 2013); https://doi.org/10.1117/12.2023228

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KEYWORDS

Visibility

Atmospheric modeling

Atmospheric particles

Atmospheric optics

Aerosols

Environmental sensing

Meteorology

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