Articles | Volume 29, issue 1
Nonlin. Processes Geophys., 29, 123–131, 2022
https://doi.org/10.5194/npg-29-123-2022
Nonlin. Processes Geophys., 29, 123–131, 2022
https://doi.org/10.5194/npg-29-123-2022
Research article
24 Mar 2022
Research article | 24 Mar 2022

Characteristics of intrinsic non-stationarity and its effect on eddy-covariance measurements of CO2 fluxes

Lei Liu et al.

Data sets

Turbulent fluxes of carbon dioxide in the urban boundary layer Lei Liu https://doi.org/10.4121/14790084.v1

Detrended fluctuation analysis (DFA) M. Magris https://www.mathworks.com/matlabcentral/fileexchange/67889-detrended-fluctuation-analysis-dfa

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Short summary
We find a new kind of non-stationarity. This new kind of non-stationarity is caused by the intrinsic randomness. Results show that the new kind of non-stationarity is widespread in small-scale variations of CO2 turbulent fluxes. This finding reminds us that we need to handle the short-term averaged turbulent fluxes carefully, and we also need to re-screen the existing non-stationarity diagnosis methods because they could make a wrong diagnosis due to this new kind of non-stationarity.