Results 1 to 10 of about 7,453 (161)
A performance evaluation of despiking algorithms for eddy covariance data. [PDF]
Sci Rep, 2021 AbstractSpike detection for raw high-frequency eddy covariance time series is a challenging task because of the confounding effect caused by complex dynamics and the high level of noise affecting such data. To cope with these features, a new despiking procedure rooted on robust functionals is proposed.
Vitale D.
europepmc +6 more sources
First eddy covariance flux measurements by PTR-TOF [PDF]
Atmospheric Measurement Techniques, 2010 The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. The high time resolution of the PTR-TOF allowed storing full mass spectra up to <i>m/z</i> 315 with a
M. Müller +10 more
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Ergodicity test of the eddy-covariance technique [PDF]
Atmospheric Chemistry and Physics, 2015 The ergodic hypothesis is a basic hypothesis typically invoked in atmospheric surface layer (ASL) experiments. The ergodic theorem of stationary random processes is introduced to analyse and verify the ergodicity of atmospheric turbulence measured using ...
J. Chen, Y. Hu, Y. Yu, S. Lü
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Towards a consistent eddy-covariance processing: an intercomparison of EddyPro and TK3 [PDF]
Atmospheric Measurement Techniques, 2014 A comparison of two popular eddy-covariance software packages is presented, namely, EddyPro and TK3. Two approximately 1-month long test data sets were processed, representing typical instrumental setups (i.e., CSAT3/LI-7500 above grassland and Solent R3/
G. Fratini, M. Mauder
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A Comparison Assessment of Measuring Evapotranspiration in Egypt [PDF]
Journal of Soil Sciences and Agricultural Engineering, 2021 Scarce water resources management makes accurate measurements of different parameters of water requirements very critical. Therefore, the values for crop evapotranspiration and crop water requirement are identical.
M. Ibrahim +3 more
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, 2012 In the 1970s, scientists met with difficulties in estimating fluxes over tall vegetation, like forests, using flux-gradient relationship (Raupach 1979). The roughness of the exchanging surface drive to efficient turbulent mixing reducing the concentration gradient and invalidating Monin-Obukhov similarity theory (Lenschow 1995).
Longdoz, Bernard, Granier, André
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Methane emissions from an oil sands tailings pond: a quantitative comparison of fluxes derived by different methods [PDF]
Atmospheric Measurement Techniques, 2021 Tailings ponds in the Alberta oil sands region are significant sources of fugitive emissions of methane to the atmosphere, but detailed knowledge on spatial and temporal variabilities is lacking due to limitations of the methods deployed under current ...
Y. You +5 more
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Low-cost eddy covariance: a case study of evapotranspiration over agroforestry in Germany [PDF]
Atmospheric Measurement Techniques, 2019 Heterogeneous land surfaces require multiple measurement units for spatially adequate sampling and representative fluxes. The complexity and cost of traditional eddy covariance (EC) set-ups typically limits the feasible number of sampling units ...
C. Markwitz, L. Siebicke
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Flux calculation of short turbulent events – comparison of three methods [PDF]
Atmospheric Measurement Techniques, 2017 The eddy covariance method is commonly used to calculate vertical turbulent exchange fluxes between ecosystems and the atmosphere. Besides other assumptions, it requires steady-state flow conditions.
C. Schaller, M. Göckede, T. Foken
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Calculating canopy stomatal conductance from eddy covariance measurements, in light of the energy budget closure problem [PDF]
Biogeosciences, 2021 Canopy stomatal conductance is commonly estimated from eddy covariance measurements of the latent heat flux (LE) by inverting the Penman–Monteith equation.
R. Wehr, S. R. Saleska
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