Method, device and system for measuring carbon dioxide flux by dynamic box method without flowmeter

Abstract

The invention relates to a method, a device and a system for measuring carbon dioxide flux by a dynamic box method without a flow meter. The method for measuring the flux of carbon dioxide by the dynamic box method without a flow meter comprises the steps of: S1, determining the area to be measured, and buckling the airtight box on the area to be tested; S2, passing the outside air through the alkaline solution, and then inputting it into the airtight box, Mix evenly; S3, input the gas in the airtight box into the carbon dioxide measuring instrument for measurement, and generate a series of measured values; S4, use the no-flow variable formula to perform data fitting on the series of measured values, and calculate the flux of carbon dioxide. Compared with the prior art, the non-flowmeter dynamic box method provided by the present invention measures the carbon dioxide flux method, device and system. Compared with the traditional dynamic box method, the flowmeter equipment is removed, and the non-flow variable is also used in the calculation. Formula, on the basis of ensuring the same measurement accuracy, the equipment is simpler and the cost is lower, which is a great progress in this field.

Description

technical field [0001] The invention relates to carbon dioxide measurement technology, in particular to a method, a device and a system for measuring carbon dioxide flux by a dynamic box method without a flow meter. Background technique [0002] Part of the carbon dioxide in the atmospheric environment comes from the precipitation from the soil surface after the organic matter in the soil decays and decomposes. The dynamic closed box method of carbon dioxide flux measurement is to use the external pump or the built-in pump of the carbon dioxide measuring instrument to actively introduce the outside air into the dynamic closed box. concentration of carbon dioxide in the air. The dynamic airtight box method is more objective and real, and it is currently considered to be an ideal method for measuring carbon dioxide flux. The traditional dynamic airtight box method requires a flowmeter to measure the flow rate of the pump, and the high-precision electronic flowmeter is relativ...

AI Technical Summary

Problems solved by technology

The dynamic airtight box method is more objective and real, and it is currently considered to be an ideal method for measuring carbon dioxide flux. The traditional dynamic airtight box method requires a flowmeter to measure the flow rate of the pump, and the high-precision electronic flowmeter is relatively expensive. The equipment is mainly imported from abroad, which is difficult for ordinary scientific research institutes to afford. It is necessary to develop a method with simple equipment, low cost, and high-precision calculation of carbon dioxide flux.

[0003] The patent document with the application number 200610169662.7 discloses a method for in-situ measurement of soil carbon dioxide flux, but the use of the static box method does not solve the fundamental problem of expensive equipment required by the dynamic box method

[0004] For many years, the calculation of carbon dioxide flux has been either to buy expensive metering equipment, or to use a measurement method such as the avoidance of the dynamic box method in the above-mentioned patent literature, resulting in unobjective results and difficult to grasp the accuracy of the calculation

Therefore, there are great deficiencies in this field, especially the simplification of detection equipment and the improvement of algorithms, which urgently require inventors to carry out R&D and innovation.

Images