Results 31 to 40 of about 53,109 (325)

Eddy covariance measurement of isoprene fluxes [PDF]

open access: yesJournal of Geophysical Research: Atmospheres, 1998
A system has been developed to directly measure isoprene flux above a forest canopy by eddy covariance using the combination of a fast response, real‐time isoprene sensor and sonic anemometer. This system is suitable for making nearly unattended, long‐term, and continuous measurements of isoprene fluxes. Isoprene detection is based on chemiluminescence
Guenther, Alex B, Hills, Alan J
openaire   +3 more sources

Comparative measurements of water vapor fluxes over a tall forest using open- and closed-path eddy covariance system [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
Eddy covariance using infrared gas analyzes has been a useful tool for gas exchange measurements between soil, vegetation and the atmosphere. So far, comparisons between the open- and closed-path eddy covariance (CP) system have been extensively made on ...
J. B. Wu   +3 more
doaj   +1 more source

Bubble-Mediated Gas Transfer and Gas Transfer Suppression of DMS and CO2 [PDF]

open access: yes, 2018
Direct dimethyl sulfide (DMS) flux measurements using eddy covariance have shown a suppression of gas transfer at medium to high wind speed. However, not all eddy covariance measurements show evidence of this suppression.
Asher W.   +6 more
core   +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

Benthic oxygen exchange in a live coralline algal bed and an adjacent sandy habitat: an eddy covariance study [PDF]

open access: yes, 2015
Coralline algal (maerl) beds are widespread, slow-growing, structurally complex perennial habitats that support high biodiversity, yet are significantly understudied compared to seagrass beds or kelp forests.
Attard, Karl M.   +5 more
core   +2 more sources

The Sensible Heat Flux in the Course of the Year at Ny-Ålesund, Svalbard: Characteristics of Eddy Covariance Data and Corresponding Model Results

open access: yesAdvances in Meteorology, 2015
In this paper we present one year of meteorological and flux measurements obtained near Ny-Ålesund, Spitsbergen. Fluxes are derived by the eddy covariance method and by a hydrodynamic model approach (HMA) as well.
Georg Jocher   +5 more
doaj   +1 more source

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

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

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