Method for monitoring carbon flux emission rule in ecological system region

Abstract

The invention discloses a method for monitoring a carbon flux emission rule in an ecological system region. The method comprises the following steps: acquiring initial values of carbon dioxide concentrations at different heights in the ecological system area; obtaining correction values of carbon dioxide concentrations at different heights through a BLS algorithm; obtaining accurate values of carbon dioxide concentration fields at different heights through an ART algorithm; according to the accurate values of the carbon dioxide concentration fields at different heights, calculating the carbon flux in the ecological system region through a Fick algorithm; obtaining environmental factor parameters in the ecological system area, integrating environmental factors and the carbon flux data, building an ELM model, and obtaining the carbon flux emission rule in the ecological system area. The method for monitoring the carbon flux emission rule in the ecological system region has the technical advantages of being high in temporal-spatial resolution, high in measurement speed, high in stability, capable of conducting continuous and real-time online monitoring analysis on the rice field carbon flux and the like.

Description

technical field [0001] The invention belongs to the field of carbon cycle research, and in particular relates to a method for monitoring the discharge law of carbon flux in an ecological system area. Background technique [0002] Carbon flux is one of the most basic concepts in carbon cycle research, expressing the total amount of carbon in an ecosystem passing through a certain ecological section. Carbon flux estimation is a key technical link in the study of carbon cycle and carbon budget under the background of global change. [0003] There are mainly four methods for traditional carbon flux measurement: static air box method, model method, micrometeorological method and dynamic air box method. With the further development and deepening of carbon flux research, many scholars have put forward many improvement schemes based on traditional carbon flux measurement methods, and based on this, they have studied rice planting links (transplanting, fertilization, irrigation and ...

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Problems solved by technology

[0006] 2. Sampling strategies for estimating regional carbon flux mainly use methods such as simple random sampling, uniform sampling, partitioned sampling, and mixed sampling, without considering the spatial heterogeneity of paddy field soil, and using the carbon flux of individual random points to represent the carbon flux of the entire region quantity

[0008] 3. Lack of long-term, high temporal and spatial resolution, and high-precision monitoring data

At present, European and American LI-8100 series detectors are basically used in the measurement of carbon flux in the world. The actual measurement accuracy is generally above 50 ppm, and the monitoring theory of this type of instrument is based on the CO 2 The concentration increase rate was used to calculate the soil carbon emissions, and the CO in the gas chamber during the monitoring period 2 The concentration will gradually increase, thereby inhibiting the ecosystem CO 2 In addition, this type of instrument cannot be monitored in rainy days, because the environment in rainy days is harsh, which will affect the sealing of the monitor and cause the instrument to fail to work normally.

Moreover, the instrument is expensive and cannot be deployed in large quantities

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