Results 11 to 20 of about 7,780 (201)

Predicting evapotranspiration from drone-based thermography – a method comparison in a tropical oil palm plantation [PDF]

open access: yesBiogeosciences, 2021
For the assessment of evapotranspiration, near-surface airborne thermography offers new opportunities for studies with high numbers of spatial replicates and in a fine spatial resolution.
F. Ellsäßer   +8 more
doaj   +1 more source

Globally Scalable Approach to Estimate Net Ecosystem Exchange Based on Remote Sensing, Meteorological Data, and Direct Measurements of Eddy Covariance Sites

open access: yesRemote Sensing, 2022
Despite a rapid development of Nature-Based Solutions (NBS) for carbon removal in recent years, the methods for evaluating NBS still have certain gaps. We propose an approach based on a combination of remote sensing data and meteorological variables to ...
Ruslan Zhuravlev   +4 more
doaj   +1 more source

The INFLUX network – eddy covariance in and around an urban environment [PDF]

open access: yesEarth System Science Data
The eddy covariance method is used by various disciplines to measure atmospheric fluxes of both vector and scalar quantities. One long-term, multi-site urban flux network experiment was the Indianapolis Flux Experiment (INFLUX), which successfully ...
J. P. Horne   +8 more
doaj   +1 more source

Chemical sensor resolution requirements for near-surface measurements of turbulent fluxes [PDF]

open access: yesAtmospheric Chemistry and Physics, 2011
Businger and Delany (1990) presented an approach to estimate the sensor resolution required to limit the contribution of the uncertainty in the chemical concentration measurement to uncertainty in the flux measurement to 10 % for eddy covariance ...
M. D. Rowe   +2 more
doaj   +1 more source

Using Stochastic Ray Tracing to Simulate a Dense Time Series of Gross Primary Productivity

open access: yesRemote Sensing, 2015
Eddy-covariance carbon dioxide flux measurement is an established method to estimate primary productivity at the forest stand level (typically 10 ha).
Martin van Leeuwen   +2 more
doaj   +1 more source

Ergodicity test of the eddy-covariance technique [PDF]

open access: yesAtmospheric 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
doaj   +1 more source

Improved Post-processing of Eddy-Covariance Data to Quantify Atmosphere–Aquatic Ecosystem CO2 Exchanges

open access: yesFrontiers in Marine Science, 2018
The capture of carbon by aquatic ecosystems and its sequestration in sediments has been studied as a potential method for mitigating the adverse effects of climate change.
Tatsuki Tokoro, Tomohiro Kuwae
doaj   +1 more source

Comparative CO2 flux measurements by eddy covariance technique using open- and closed-path gas analysers over the equatorial Pacific Ocean [PDF]

open access: yesTellus: Series B, Chemical and Physical Meteorology, 2012
Direct comparison of air–sea CO2 fluxes by open-path eddy covariance (OPEC) and closed-path eddy covariance (CPEC) techniques was carried out over the equatorial Pacific Ocean.
Fumiyoshi Kondo, Osamu Tsukamoto
doaj   +1 more source

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

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

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