Vegetation temperature and bare land temperature estimation method based on satellite remote sensing data

Abstract

The invention discloses a vegetation temperature and bare land temperature estimation method based on satellite remote sensing data. The vegetation temperature and bare land temperature estimation method comprises the following steps: step 1, preparing satellite remote sensing data and ground meteorological observation data; 2, calculating the vegetation coverage according to the data in the step 1; 3, calculating the bare land albedo, the bare land emissivity and the vegetation emissivity according to the data in the step 1; and 4, calculating the bare land temperature and the vegetation temperature. The method is based on the earth surface energy balance principle, does not depend on other pixel information, uses satellite remote sensing data, including but not limited to the earth surface temperature, the earth surface emissivity, the vegetation index, the vegetation type and ground meteorological observation data, of a target pixel as input, calculates the vegetation temperature and bare land temperature of the target pixel, has spatial independence, and is high in precision, and improves the estimation precision.

Description

technical field [0001] The invention relates to a method for estimating vegetation temperature and bare ground temperature, belonging to the technical field of satellite remote sensing, in particular to a method for estimating vegetation temperature and bare ground temperature based on satellite remote sensing data. Background technique [0002] Land Surface Temperature (LST) or T L ) is characterized by the pixel scale, which only represents the average land surface temperature of the area covered by the pixel, and cannot distinguish the vegetation temperature and bare land temperature in the pixel with different vegetation coverage. [0003] Land Surface Temperature (LST) or T L ) characterizes the temperature state of the earth's land surface, and is a key variable in the surface energy balance and water cycle. It plays a very important role in the study of land-atmosphere interaction and climate change. All fields have important application value. The surface temperat...

AI Technical Summary

Problems solved by technology

Aiming at the shortcomings of the existing calculation method, which has no physical mechanism support and cannot be applied to areas with high spatial heterogeneity, the present invention proposes a method based on the principle of surface energy balance, which does not depend on other pixel information, and uses target image The satellite remote sensing data (including surface temperature, surface emissivity, vegetation index, vegetation type, etc.)

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