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Method and system for acquiring sunlight-induced chlorophyll fluorescence data

A technology of chlorophyll fluorescence and chlorophyll content, applied in fluorescence/phosphorescence, other database retrieval, other database indexing, etc., can solve the problems of sensor temporal and spatial resolution limitations, and achieve the effect of high temporal and spatial resolution and strong physical foundation

Pending Publication Date: 2021-11-19
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a method and system for obtaining sunlight-induced chlorophyll fluorescence data, which solves the technical problems in the prior art that are all based on machine learning algorithms and limited by the inherent temporal and spatial resolution of the sensor

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  • Method and system for acquiring sunlight-induced chlorophyll fluorescence data
  • Method and system for acquiring sunlight-induced chlorophyll fluorescence data
  • Method and system for acquiring sunlight-induced chlorophyll fluorescence data

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Embodiment Construction

[0052] The embodiment of the present invention provides a method and system for acquiring sunlight-induced chlorophyll fluorescence data, which solves the technical problem in the prior art that is based on machine learning algorithms and is limited by the inherent temporal and spatial resolution of the sensor.

[0053] The technical solution in the embodiment of the present invention is to solve the above-mentioned problems, and the general idea is as follows:

[0054] First obtain vapor pressure content data, surface albedo data, leaf area index, wind speed, air temperature, and surface receiving short-wave and long-wave radiation data; then obtain chlorophyll content data based on surface albedo data and a preset lookup table; steam Pressure content data, leaf area index, wind speed, air temperature, surface receiving short-wave and long-wave radiation data, and chlorophyll content data are input into the preset radiation transfer model, and the output is chlorophyll fluores...

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Abstract

The invention discloses a method and system for acquiring sunlight-induced chlorophyll fluorescence data. The method comprises the following steps: acquiring vapor pressure content data, surface reflectance data, leaf area index, wind speed, air temperature, surface received short wave and long wave radiation data; performing inversion based on the surface reflectance data and a preset lookup table to obtain chlorophyll content data; and inputting the vapor pressure content data, the leaf area index, the wind speed, the air temperature, the earth surface received short-wave and long-wave radiation data and the chlorophyll content data into a preset radiation transmission model, and outputting the data to obtain chlorophyll fluorescence data. The data set obtained through the method is high in temporal-spatial resolution, the data obtaining result has a strong physical basis, and the method can be suitable for large, medium and small-scale fluorescence inversion verification and deep application of fluorescence data products.

Description

technical field [0001] The invention relates to the technical field of agricultural energy, in particular to a method and system for acquiring sunlight-induced chlorophyll fluorescence data. Background technique [0002] Sunlight-induced chlorophyll fluorescence (hereinafter referred to as chlorophyll fluorescence, SIF) is a light signal between 650-800nm ​​that is actively released by plants when they perform photosynthesis under natural light conditions. As one of the by-products of photosynthesis, chlorophyll fluorescence is closely related to photosynthetically active radiation, total primary productivity of vegetation, and various stress factors. Therefore, accurate measurement of chlorophyll fluorescence has broad prospects and significance for monitoring vegetation growth, regional ecosystem stability, distribution of global carbon sources and carbon sinks, and terrestrial carbon cycle. [0003] In order to improve the spatio-temporal resolution of chlorophyll fluore...

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Application Information

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IPC IPC(8): G01N21/64G01D21/02G06F16/901G06F17/18
CPCG01N21/6456G01D21/02G06F17/18G06F16/9017G01N2021/635G01N2021/1797
Inventor 杨健杨淞晰史硕张阳阳杜霖
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)