Eddy covariance measurements
Estimating the storage term in eddy covariance measurements: the ICOS methodology
... In eddy covariance measurements, the storage flux represents the variation in time of the dry molar fraction of a given gas in the control volume representative of turbulent ...the ...
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Evaluation of a lower-powered analyzer and sampling system for eddy-covariance measurements of nitrous oxide fluxes
... a larger 30 ha aerodynamically homogeneous and flat field (Fig. 1a) under the same crop management practices. The soil at the site was a Guelph silt loam (fine loamy, mixed, mesic Glossoboric Hapludalf). Corn was planted ...
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Inferring 222 Rn soil fluxes from ambient 222 Rn activity and eddy covariance measurements of CO 2
... the eddy-covariance measurements; hence it is relatively small ( ∼ 15 km distance at 60 m measurement height) compared to the much larger footprint (over 100 km distance) during purely stable atmo- ...
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Dead Sea evaporation by eddy covariance measurements vs aerodynamic, energy budget, Priestley–Taylor, and Penman estimates
... The eddy covariance method is used for the first high- resolution, direct evaporation measurements of the Dead ...the measurements, where the latter one leads to a serious soiling of the ...
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Evaluating four gap-filling methods for eddy covariance measurements of evapotranspiration over hilly crop fields
... LE measurements include a prior splitting of the time series to be filled (Ta- ble 1), so that missing data are filled with existing observa- tions collected under similar ...
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Comparative assessment of net CO2 exchange across an urbanization gradient in Korea based on eddy covariance measurements
... urbanization gradient in Korea with high-rise high-den- sity urban residential, suburban, double-cropping crop- land, and forest canopy areas. Our study shows that the systematic differences due to different data ...
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Eddy covariance measurements of the sea spray aerosol flux over the open ocean
... [O’Dowd and de Leeuw, 2007; de Leeuw et al., 2007, 2011]. Almost all sea spray source functions have been derived via indirect techniques; the most widely used of which is the measurement of the mean size spectra and an ...
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Constraining ecosystem model with adaptive Metropolis algorithm using boreal forest site eddy covariance measurements
... used eddy covariance data acquired and shared by the FLUXNET community, including these networks: AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, CarboEuropeIP, CarboItaly, CarboMont, ChinaFlux, Fluxnet-Canada, ...
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Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
... cars than for gasoline. he modelled leet average contribution suggests that at least 90% of urban NOx emissions should originate from Diesel driven vehicles at the present location. 85% is modelled to be emitted by the ...
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Evaluation of Artificial Neural Networks and Eddy Covariance Measurements for Modelling the CO2 Flux Dynamics in the Acoculco Geothermal Caldera (Mexico)
... measurements without ground surface interferences, which are averaged with time, and recorded from a larger spatial scale (m 2 to km 2 ) depending on the EC tower height. However, it is also recognized some ...
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Nitrous oxide emissions from managed grassland: a comparison of eddy covariance and static chamber measurements
... for eddy covariance measurements was situ- ated on the boundary between the two ...enabled eddy covariance flux measurements from the South field in south westerly wind and from ...
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Quantifying the impact of emission outbursts and non stationary flow on eddy covariance CH4 flux measurements using wavelet techniques
... Our study investigated the impact of short-term episodic emission outbursts, so-called event fluxes, on the overall data quality of methane fluxes observed by eddy-covariance towers over a wet tussock ...
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Potential evaporation at eddy covariance sites across the globe
... evaporation measurements is to be preferred (Lhomme, ...evaporation measurements available ...evaporation measurements are more easy to perform and are broadly available (Zhou et ...2009). ...
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Interpreting eddy covariance data from heterogeneous Siberian tundra: land cover specific methane fluxes and spatial representativeness
... Rebmann, C., Göckede, M., Foken, T., Aubinet, M., Aurela, M., Berbigier, P., Bernhofer, C., Buchmann, N., Carrara, A., Cescatti, A., Ceulemans, R., Clement, R., Elbers, J. A., Granier, A., Grün- wald, T., Guyon, D., ...
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First eddy covariance flux measurements by PTR-TOF
... For the last decade, Proton Transfer Reaction Mass Spec- trometers (PTR-MS) have proven to be valuable tools for at- mospheric research. The PTR-MS was developed in the mid nineties as a fast, real-time organic trace gas ...
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Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers
... The dry chemiluminescence (DC) method has been used most regularly and successfully in a variety of environments and settings (e.g. Tuovinen et al., 1998, Bauer et al., 2000; Gallagher et al., 2001; Bassin, et al., 2004; ...
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Eddy-covariance flux measurements with a weight-shift microlight aircraft
... aircraft-based eddy-covariance measurements, we also include sensible heat flux estimates from the large-aperture scintillometer in the ...flux measurements are aver- aged over 10 min, ...
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Uncertainty of eddy covariance flux measurements over an urban area based on two towers
... the eddy covariance (EC) technique are done in the inertial sub- layer and free from obstructions (Roth, ...EC measurements from urban areas are needed for the pur- poses of wind engineering, ...
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Standardisation of eddy-covariance flux measurements of methane and nitrous oxide
... In the ‘separate’ scheme (named ‘A’ in the protocol), concentrations at each inlet (height) are continuously sam- pled by a dedicated gas analyser. In the ‘sequential’ scheme (‘B’ in the protocol) a single gas analyser ...
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Simultaneously assimilating multivariate data sets into the two-source evapotranspiration model by Bayesian approach: application to spring maize in an arid region of northwestern China
... The field observation systems at this site were constructed in May 2012 as part of the Heihe Watershed Allied Teleme- try Experimental Research (HiWATER) project (see details in Li et al., 2013b). The fluxes of sensible ...
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