Floatable dynamic box system for in-situ determination of greenhouse gas on water-gas interface and determination method

By designing a floating dynamic box system, combined with dynamic flow sampling and pressure balancing, the problems of pressure difference and continuous monitoring in the water-air interface greenhouse gas measurement device were solved, realizing stable and continuous measurement of greenhouse gas flux at the water-air interface, and improving the accuracy and reliability of the measurement.

CN121933683APending Publication Date: 2026-04-28XIAMEN UNIV
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Patent Information

Application Number
CN202610093794.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

Existing greenhouse gas measurement devices at the water-air interface are prone to pressure differences due to gas extraction or gas accumulation, which affects the accuracy of flux measurement. Furthermore, they are difficult to achieve continuous and real-time monitoring and are susceptible to human operation and environmental disturbances in aquatic environments, resulting in poor measurement stability and reliability.

Method used

The system employs a floating dynamic chamber system, which includes a floating sample-containing gas chamber, an openable and closable gas chamber top cover, an air pump, a greenhouse gas measurement module, and a data analysis processor. Through dynamic flow-through sampling and pressure balance design, it achieves stable and continuous measurement of greenhouse gas flux at the water-air interface.

Benefits of technology

Achieving pressure balance under in-situ water conditions avoids interference with the natural diffusion process, resulting in good system stability and high measurement efficiency, thus improving the authenticity and reliability of the measurement results.

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Abstract

The invention discloses a floatable dynamic box system for in-situ determination of greenhouse gas on a water-gas interface and a determination method, and relates to the technical field of water-gas interfaces, the floatable dynamic box system comprises a floatable sample accommodating gas chamber, an openable gas chamber top cover, a gas pump, a greenhouse gas measurement module and a data analysis processor. According to the method, a low-flow continuous gas extraction mode is adopted, equal-flow balance of gas is achieved through the gas inlet and the gas outlet, and pressure balance inside and outside the gas chamber is guaranteed. Compared with a traditional static box method and a vortex correlation method, flux data with higher time resolution can be obtained within shorter time, the application range is wide, manufacturing is easy, and the efficiency and accuracy of measuring the greenhouse gas flux of the water-gas interface are improved.
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