Skip to main content
U.S. flag

An official website of the United States government

Uncertainty in eddy covariance measurements and its application to physiological models

Author(s):

A.D. Richardson
A.D. Richardson

Year:

2005

Publication type:

Miscellaneous Publication

Primary Station(s):

Northern Research Station

Source:

Tree Physiology. 25: 873-885.

Description

Flux data are noisy, and this uncertainty is largely due to random measurement error. Knowledge of uncertainty is essential for the statistical evaluation of modeled andmeasured fluxes, for comparison of parameters derived by fitting models to measured fluxes and in formal data-assimilation efforts. We used the difference between simultaneous measurements from two towers located less than 1 km apart to quantify the distributional characteristics of the measurement error in fluxes of carbon dioxide (CO2) and sensible and latent heat (H and LE, respectively). Flux measurement error more closely follows a double exponential than a nornal distribution. The CO2 flux uncertainty is negatively correlated with mean wind speed, whereas uncertainty in H and LE is positively correlated with net radiation flux.

Citation

Hollinger, D.Y.; Richardson, A.D. 2005. Uncertainty in eddy covariance measurements and its application to physiological models. Tree Physiology. 25: 873-885.

Publication Notes

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/21276