Method for obtaining net carbon budget of regional scale forest ecological system

An ecosystem and acquisition method technology, applied in the field of eddy-related technology and remote sensing image processing, can solve the problems that cannot reflect the carbon budget of a large-scale forest ecosystem

Inactive Publication Date: 2012-07-18
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the eddy correlation technology can only represent the carbon budget of the surrounding ecosystem of the observa

Method used

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  • Method for obtaining net carbon budget of regional scale forest ecological system
  • Method for obtaining net carbon budget of regional scale forest ecological system
  • Method for obtaining net carbon budget of regional scale forest ecological system

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Experimental program
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specific Embodiment approach 1

[0037] Step 1. Select forest flux observation sites with large differences in community structure, tree species composition, forest age, altitude and geographical location;

[0038] Step 2, carry out MODIS data acquisition and preprocessing, the specific method is as follows:

[0039] A. Download the MOD09A1 surface reflectance data synthesized in 8 days, and calculate the enhanced vegetation index EVI:

[0040] EVI = 2.5 ρ nir - ρ red ρ nir + ( 6 ρ red - 7.5 ρ blue ) + 1 ……Formul...

Embodiment

[0053] Example: Combine Figures 1 to 10 To illustrate this example:

[0054] The specific implementation of the technical solution of the present invention will be analyzed in conjunction with the following examples (evergreen coniferous forest and falling broad-leaved forest, data from AmeriFLUX):

[0055] Step 1. Site Selection

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Abstract

The invention discloses a method for obtaining net carbon budget of a regional scale forest ecological system, belonging to the technical field of the combination of related vorticity technology and remote sensing image processing. The invention provides the method for obtaining the net carbon budget of the regional scale forest ecological system, which aims at solving the problems that the related vorticity technology only represents the carbon budget condition of an ecological system at the periphery of an observing tower, but can not reflect the carbon budget condition of the forest ecological system in a large scale. The method comprises the steps of selecting different forest flux observing stations; obtaining and preprocessing the data of MODIS (Moderate Resolution Imaging Spectroradiometer); obtaining and processing data NEE of the flux observing stations; according to the types of the forest ecological systems, utilizing SPSS (Statistical Product and Service Solution) software to respectively record net carbon exchanging NEE data of representative stations and corresponding parameter relevance of EVI (Enhanced Vegetation Index), LSWI (Land Surface Water Index), LST (Land Surface Temperature) and LST'; generating a quantitative inverse model of the net carbon exchanging NEE of all types of forests; and testing and verifying the simulated results of the model so as to check the effectiveness. The method is used for obtaining the carbon budget condition of the forest ecological system in the large scale.

Description

technical field [0001] The invention relates to the technical field of combining eddy correlation technology with remote sensing image processing. Background technique [0002] The forest ecosystem is the main body of the terrestrial biosphere and plays an irreplaceable role in mitigating global climate change. Obtaining the current status, change process and future carbon sink potential of forest ecosystem carbon sources and sinks at the national or regional scale is of great significance for understanding the global carbon cycle mechanism, coping with climate change and environmental diplomacy negotiations. In order to minimize the pressure of implementation, my country has implemented a number of major forestry projects such as natural forest protection, shelter forests, and returning farmland to forests in the past 20 years. However, there are still great differences in the carbon budget, spatial distribution, and formation mechanism of forest ecosystems. Therefore, ther...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘殿伟汤旭光王宗明贾明明董张玉
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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