LI-7700 Open Circuit CH₄、 CO₂、 H₂The O flux analysis system is a greenhouse gas flux observation system developed and produced by LI-COR company in the United States, which is particularly suitable for remote areas with power supply limitations. The system is composed of CH₄、 CO₂、 H₂O、 Composed of basic flux monitoring equipment such as energy.

There are also a range of high-performance solutions available for data processing and management. Equipped with SmartFlux^®LI-7700 open circuit CH module₄/CO₂/H₂The O flux analysis system can directly process raw monitoring data in the field into final flux results, which can be directly used for subsequent scientific research and analysis. Additionally, you can choose FluxSuite^®To manage flux data and monitor instrument status in real-time. These functions are currently only available in the LI-COR vorticity covariance analysis system worldwide.

Main advantage
·In situ monitoring for fast and accurate CO₂And H₂O measurement
·Accurate temperature control ensures long-term stability of optical filters
·The improved optical structure enhances the stability of the instrument in dusty environments
·The system has no air pump and pipeline channels, eliminating pressure drop, water vapor adsorption, and time delay effects, resulting in more accurate measurement results
·Automatically clean the optical path, significantly reducing maintenance work and enhancing data security. Process and store complete vorticity covariance datasets online
·The system is lightweight and has low power consumption, and can be powered by solar energy in the field

system composition

Technical principles

system principle
The system adopts the vorticity covariance method, using high-frequency wind speed and gas concentration data above 10Hz, and through a series of data calculation and processing processes, obtains CO within the monitoring range₂、 H₂O、 And energy flux. Used for research in boundary layer meteorology, ecology, global change, and other fields.

data acquisition
Output GHG data format, including complete instrument information, plot information CH₄、 CO₂And H₂The concentration of oxygen, three-dimensional wind speed, and data from biological meteorological sensors are stored in industrial grade USB flash drives. Convenient for future use of EddyPro^®Perform data processing.

data processing
It is easy to process raw GHG format data into flux results using LI-COR's open source. EddyPro^®The local version is installed on a personal computer and allows for various processing methods to perform in-depth analysis on the raw data. EddyPro^®Field version with SmartFlux^®The system is installed on a field vorticity monitoring station and can process complete flux results in real-time according to personal settings. The software provides Express mode and Advanced mode, which can adapt to simple and fast common data processing, and also provide flexible choices for expert researchers.

application area
Methane emissions from ecosystems such as farmland, swamps, wetlands, and forests, as well as monitoring atmospheric methane flux using vorticity covariance methods.

Procurement Information

(including SmartFlux)^® 2Real time online flux calculation module

optional components





free access

extensive reading

Origin and Manufacturer: LI-COR Corporation, USA