Application of multi-rotor UAV-borne flux observation system in carbon dioxide flux monitoring of reed wetland

doi:10.13287/j.1001-9332.202504.003

Abstract

Abstract: The accurate monitoring of ecosystem carbon flux is the key to scientific assessment of terrestrial carbon sequestration. There is a big challenge for the tower-based eddy covariance system to cover multiple ecosystem types in a region. We introduced a multi-rotor UAV-borne flux observation system, and evaluated its observational accuracy based on the comparison of carbon flux between the multi-rotor UAV-borne flux observation system and the tower-based eddy covariance system within an experiment conducted in the reed wetland of the Liaohe Delta from July 27 to 29, 2023. The results showed that the multi-rotor UAV-borne flux observation system could monitor ecosystem carbon flux well, and the observed carbon flux source area was basically consistent with the eddy covariance system. The half-hour ecosystem carbon flux was significantly correlated with the observation results of the eddy correlation system, with a correlation coefficient of 0.889 and a root mean square error of 0.881. Our results provided a scientific basis for using the multi-rotor UAV-borne flux observation system to monitor ecosystem-atmosphere flux exchange across different ecosystem types.

Key words: UAV-borne flux, flux observation, multi-rotor UAV-borne flux observation system, reed wetland, net ecosystem carbon dioxide exchange

JIANG Xiaowen, ZHOU Guangsheng, SONG Xingyang. Application of multi-rotor UAV-borne flux observation system in carbon dioxide flux monitoring of reed wetland[J]. Chinese Journal of Applied Ecology, 2025, 36(4): 1189-1196.

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