eddy covariance
Potential evaporation at eddy covariance sites across the globe
... used eddy-covariance data acquired and shared by the FLUXNET community, including these networks: AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, CarboEuropeIP, CarboItaly, CarboMont, ChinaFlux, FLUXNET-Canada, ...
24
Eddy covariance carbonyl sulfide flux measurements with a quantum cascade laser absorption spectrometer
... following eddy covariance flux calculations were conducted for three high-pass filtering sce- narios commonly used in the literature: (i) block averaging (BA), (ii) linear detrending (LD), and (iii) ...
13
A comparison of eddy covariance and large aperture scintillometer measurements with respect to the energy balance closure problem
... The eddy covariance (EC) method has been widely applied to measure the exchange of energy, water vapor, and car- bon dioxide between the land surface and the ...
16
Eddy covariance raw data processing for CO2 and energy fluxes calculation at ICOS ecosystem stations
... The eddy covariance (EC) technique is a reliable, wide- spread methodology used to quantify turbulent exchanges of trace gases and energy between a given ecosystem at the earth’s surface and the ...of ...
24
Incorporating grassland management in ORCHIDEE: model description and evaluation at 11 eddy-covariance sites in Europe
... ries. The SSA method was shown to be suitable for ex- ploring the time variability of eddy-covariance ecosystem– atmosphere fluxes (Mahecha et al., 2007), and was used to explore model–data misfit on ...
17
Uncertainty of eddy covariance flux measurements over an urban area based on two towers
... Abstract. The eddy covariance (EC) technique is the most direct method for measuring the exchange between the sur- face and the atmosphere in different ecosystems. Thus, it is commonly used to get ...
18
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 the North ...
16
Eddy covariance flux measurements of ammonia by high temperature chemical ionisation mass spectrometry
... Relaxed Eddy Accumulation technique, Bio- geosciences, 6, 2575–2588, ...in eddy covariance applications: A compari- son of available approaches, ...
18
The case for increasing the statistical power of eddy covariance ecosystem studies : why, where and how?
... The eddy covariance (EC) technique provides one of the most direct measures of energy and mass exchanges between the land surface and the atmosphere (Baldoc- chi, 2008, ...
12
A comparison of methods for determining field evapotranspiration: photosynthesis system, sap flow, and eddy covariance
... studies conducted in the forest ecosystem) (Dugas, 1990) or on plant population and sampled plant leaf area (Ham et al., 1990). Both of these approaches demonstrated that the cot- ton transpiration measured by sap flow ...
20
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 ...
15
Low-cost eddy covariance: a case study of evapotranspiration over agroforestry in Germany
... Low-cost eddy covariance (EC-LC) installation The low-cost eddy covariance set-up shared the same ultra- sonic anemometer (uSONIC-3 Omni) as used for the conven- tional EC ...
20
Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers
... Abstract. We present a systematic intercomparison study of eddy covariance ozone flux measurements made using two fast response dry chemiluminescence analysers. Ozone de- position was measured over a well ...
14
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, ...
19
Dried, closed-path eddy covariance method for measuring carbon dioxide flux over sea ice
... there has been significant confusion around the importance of that role, largely because the community studying sea ice gas fluxes has been unable to reconcile large fluxes measured by eddy covariance with ...
16
Measurements and quality control of ammonia eddy covariance fluxes: a new strategy for high-frequency attenuation correction
... lation, the 3-D wind vector coordinate is typically rotated to ensure zero vertical wind velocity over the averaging period (Finnigan et al., 2003; Wilczak et al., 2001). Due to the tower rotation mechanism used in this ...
20
Using eddy covariance to measure the dependence of air–sea CO2 exchange rate on friction velocity
... When the air stream approaches the ship, the streamlines are distorted by the bluff body. This leads to an uplift of the air from its original height and to an upward tilt of the stream- lines. For accurate eddy ...
19
Eddy-covariance data with low signal-to-noise ratio: time-lag determination, uncertainties and limit of detection
... The simulations applied to sensible heat flux data reveal a distinct relationship between the signal-to-noise ratio of the raw temperature data and the relative flux bias for both the MAX and AVG lag determination ...
17
Optimization of an enclosed gas analyzer sampling system for measuring eddy covariance fluxes of H 2O and CO2
... Abstract. Several initiatives are currently emerging to ob- serve the exchange of energy and matter between the earth’s surface and atmosphere standardized over larger space and time domains. For example, the National ...
19
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 ...
18