Method for performing inversion on optical property of aerosol of coastal zone by using MODIS image

Abstract

The invention relates to a method for performing inversion on the optical property of aerosol of a coastal zone, and provides a new algorithm for performing inversion on the optical property of the aerosol of a coastal area in China by using a satellite image aiming at the characteristics of a large number of aerosol particles with high reflectivity and strong absorbability on the ocean surface of the coastal area in China. In the algorithm, the research is conducted by taking an image of a moderate resolution imaging spectroradiometer (MODIS) as an example; the inversion of the optical property of atmospheric aerosol over a muddy water area is finished by using the images of long wave bands of 1,240 nm, 1,640nm and 2,133 nm of the MODIS and a lookup table; and the correctness and applicability of the algorithm are verified by using an foundation observation result of a cleaning day. Theoretical basis is provided for adding a channel with long wave bands and transmissivity into a Chinese sea color remote sensor, the condition of the aerosol over the coastal zone can be reflected in real time, and decision basis is provided for related functional departments.

Description

technical field [0001] The patent of this invention relates to the study of aerosol optical properties over the ocean, especially the inversion of aerosol optical properties in the coastal zone. Background technique [0002] At present, water bodies are often divided into first-class water bodies and second-class water bodies in the world, and most of the coastal zones are second-class water bodies. The commonly used coastal aerosol retrieval algorithms are the dark target method and the adjacent pixel iteration method, but the dark target method is only suitable for areas where the aerosol has no or weak absorption and the surface is clean water, and the adjacent pixel iteration method is only applicable Areas with small areas of turbid water on the surface. There are many methods for retrieving the characteristics of aerosols over the first-class water area based on satellite images, but due to the complexity of the optical characteristics of the second-class water body, ...

AI Technical Summary

Problems solved by technology

The commonly used coastal aerosol retrieval algorithms are the dark target method and the adjacent pixel iteration method, but the dark target method is only suitable for areas where the aerosol has no or weak absorption and the surface is clean water, and the adjacent pixel iteration method is only applicable An area with a small area of ​​turbid water on the surface

There are many methods for retrieving the aerosol characteristics of the first-class water area based on satellite images, but due to the complexity of the optical characteristics of the second-class water body, it is difficult to obtain a general-purpose aerosol retrieval algorithm for the second-class water body

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