covariance measurements
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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Estimating the storage term in eddy covariance measurements: the ICOS methodology
... 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 measurements, it can ...
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Eddy covariance measurements of the sea spray aerosol flux over the open ocean
... of measurements in the Outer Hebrides, almost 30 years ago [Smith et ...further measurements extended to higher wind speeds, the earlier leveling off was not observed but a similar feature occurred at the ...
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Constraining ecosystem model with adaptive Metropolis algorithm using boreal forest site eddy covariance measurements
... eddy covariance data acquired and shared by the FLUXNET community, including these networks: AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, CarboEuropeIP, CarboItaly, CarboMont, ChinaFlux, Fluxnet-Canada, GreenGrass, ...
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Evaluating four gap-filling methods for eddy covariance measurements of evapotranspiration over hilly crop fields
... eddy covariance (EC) tech- nique allows continuous measurements of latent heat flux ...EC measurements often expe- rience large portions of missing data because of instrumental malfunctions or ...
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Comparative assessment of net CO2 exchange across an urbanization gradient in Korea based on eddy covariance measurements
... Measurements were taken at four sites in Korea: a high- rise high-density residential area in EunPyeong, Seoul (HU: 37.6350°N, 126.9287°E; Fig. 1a); an open low-rise suburban area in Ochang, Cheongju (SU: ...
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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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Nitrous oxide emissions from managed grassland: a comparison of eddy covariance and static chamber measurements
... eddy covariance measurements was situ- ated on the boundary between the two ...eddy covariance flux measurements from the South field in south westerly wind and from the North field in north ...
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3D MORPHOLOGICAL MODELLING OF A RANDOM FIBROUS NETWORK
... morphological measurements performed by Peyrega et ...The covariance measurements of the fibres (Matheron, 1967; Serra, 1982) highlight the global anisotropy of the material, and the isotropy of ...
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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
... 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, identical to ...density ...
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Measurements and quality control of ammonia eddy covariance fluxes: a new strategy for high-frequency attenuation correction
... ing and was heated constantly to 40 ◦ C. The glass inlet acts as a critical orifice that regulates the volume flow at the in- let. From 28 May to 27 July a glass inlet with a flow rate of 15.4 L min −1 was used, and ...
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A comparison of eddy covariance and large aperture scintillometer measurements with respect to the energy balance closure problem
... eddy covariance (EC) systems and a large aperture scintillometer (LAS) in the Heihe River Basin, China, in 2008 and ...LAS measurements with a foot- print model for each site and discussed the differences ...
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Analysis of covariance
... of Covariance), bir araştırmada, bağımlı değişken üzerindeki etkisi incele- nen iki ya da daha çok grubu içeren bağımsız değişkenin dışında, bağımlı değişken ile ilişkisi bulunan ve ortak değişken (covariate) ...
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An airborne regional carbon balance for Central Amazonia
... eddy covariance studies (as well as the earlier study of Grace et ...stand-level measurements above relatively undisturbed forests to give erroneous regional carbon bal- ...
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3D MORPHOLOGICAL ANALYSIS OF COMPOSITE MATERIALS WITH AGGREGATES OF SPHERICAL INCLUSIONS
... by measurements on 3D images, such as the covariance and two point correlation functions of separate spheres in various directions, a tortuosity index obtained from 3D geodesic propagation, local volume ...
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Minimum number of measurements for evaluating Bertholletia excelsa.
... A significant effect of the measurement factor suggests that these can be affected by regular, irregular, or systematic physiological changes. As this effect can vary in different ways and intensities among the Brazil ...
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Infrared and millimetre-wave scintillometry in the suburban environment – Part 1: Structure parameters
... kilometres. Measurements are spatial averages, making this technique particularly valuable over areas with moderate heterogene- ity such as mixed agricultural or urban ...eddy covariance station located ...
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Comparison of two closed-path cavity-based spectrometers for measuring air–water CO 2and CH4 fluxes by eddy covariance
... Peltola, O., Hensen, A., Helfter, C., Belelli Marchesini, L., Bosveld, F. C., van den Bulk, W. C. M., Elbers, J. A., Haapanala, S., Holst, J., Laurila, T., Lindroth, A., Nemitz, E., Röckmann, T., Vermeulen, A. T., and ...
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