Results 21 to 30 of about 7,780 (201)

A methodological approach to the air-sea energy fluxes data collection and analysis at the tropical coastal ocean

open access: yesMethodsX, 2018
The southern South China coastal oceans within the South East Asian region are much lacking in the perception of the surface energy budget and evaporation over the ocean waters in response to climatic changes.
Yusri Yusup   +2 more
doaj   +1 more source

Comparison of evapotranspiration estimates using the water balance and the eddy covariance methods

open access: yesVadose Zone Journal, 2020
The eddy covariance method estimates the energy flux of latent heat for evapotranspiration. However, imbalance between the land surface energy output and input is a well‐known fact.
Tanja Denager   +3 more
doaj   +1 more source

Evaluation of a lower-powered analyzer and sampling system for eddy-covariance measurements of nitrous oxide fluxes [PDF]

open access: yesAtmospheric Measurement Techniques, 2018
Nitrous oxide (N2O) fluxes measured using the eddy-covariance method capture the spatial and temporal heterogeneity of N2O emissions. Most closed-path trace-gas analyzers for eddy-covariance measurements have large-volume, multi-pass absorption cells ...
S. E. Brown   +2 more
doaj   +1 more source

Quantifying the impact of emission outbursts and non-stationary flow on eddy-covariance CH4 flux measurements using wavelet techniques [PDF]

open access: yesBiogeosciences, 2019
Methane flux measurements by the eddy-covariance technique are subject to large uncertainties, particularly linked to the partly highly intermittent nature of methane emissions. Outbursts of high methane emissions, termed event fluxes, hold the potential
M. Göckede   +3 more
doaj   +1 more source

Does increased spatial replication above heterogeneous agroforestry improve the representativeness of eddy covariance measurements? [PDF]

open access: yesBiogeosciences
Spatial heterogeneity in terrestrial ecosystems compromises the accuracy of eddy covariance measurements. Examples of heterogeneous ecosystems are temperate agroforestry systems, which have been poorly studied by eddy covariance.
J. Á. Callejas-Rodelas   +8 more
doaj   +1 more source

Lag time determination in DEC measurements with PTR-MS [PDF]

open access: yesAtmospheric Measurement Techniques, 2010
The disjunct eddy covariance (DEC) method has emerged as a popular technique for micrometeorological flux measurements of volatile organic compounds (VOCs).
R. Taipale, T. M. Ruuskanen, J. Rinne
doaj   +1 more source

Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces

open access: yesJournal of Glaciology
Bulk aerodynamic methods have been shown to perform poorly in computing turbulent heat fluxes at glacier surfaces during shallow katabatic winds. Katabatic surface layers have different wind shear and flux profiles to the surface layers for which the ...
Cole Lord-May, Valentina Radić
doaj   +1 more source

Estimating scalar turbulent fluxes with slow-response sensors in the stable atmospheric boundary layer [PDF]

open access: yesAtmospheric Chemistry and Physics
Conventional and recently developed approaches for estimating turbulent scalar fluxes under stable atmospheric conditions are evaluated, with a focus on gases for which fast sensors are not readily available.
M. Allouche   +10 more
doaj   +1 more source

Modelling Amazonian forest eddy covariance data: a comparison of big leaf versus sun/shade models for the C-14 tower at Manaus I. Canopy photosynthesis [PDF]

open access: yesActa Amazonica, 2006
In this study, we concentrate on modelling gross primary productivity using two simple approaches to simulate canopy photosynthesis: "big leaf" and "sun/shade" models.
Lina Mercado   +5 more
doaj   +1 more source

The use of disjunct eddy sampling methods for the determination of ecosystem level fluxes of trace gases [PDF]

open access: yesAtmospheric Chemistry and Physics, 2009
The concept of disjunct eddy sampling (DES) for use in measuring ecosystem-level micrometeorological fluxes is re-examined. The governing equations are discussed as well as other practical considerations and guidelines concerning this sampling method as ...
A. A. Turnipseed   +8 more
doaj  

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