[PDF] Top 20 A comparison of eddy covariance and large aperture scintillometer measurements with respect to the energy balance closure problem
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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 ...the energy and water vapor ... See full document
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Consistency between hydrological model, large aperture scintillometer and remote sensing based evapotranspiration estimates for a heterogeneous catchment
... of scintillometer measured H and derived LE fluxes is performed by comparison with the measurements of an EC (Eddy Covariance) or BREB (Bowen Ratio Energy Balance) ...the ... See full document
13
Assessment of actual evapotranspiration over a semiarid heterogeneous land surface by means of coupled low resolution remote sensing data with an energy balance model: comparison to extra large aperture scintillometer measurements
... water balance; it is the second largest com- ponent after precipitation (Glenn et ...the eddy covariance method, for example, whereas it is much more difficult at larger scales (irrigated perimeter ... See full document
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A Diagnostic Approach towards the Causes of Energy Balance Closure Problem
... heat energy (LE) are systematically underestimated. We studied this problem using six years of eddy-correlation measurements for four fields (corn, soybean, and prai- rie) in central Iowa, ... See full document
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Eddy-covariance flux measurements with a weight-shift microlight aircraft
... EC measurements is connected to the interaction of terrain het- erogeneity and turbulent ...the energy balance on the re- gional scale with spatially averaging methods (Mauder et ...a ... See full document
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Eddy covariance flux measurements of ammonia by high temperature chemical ionisation mass spectrometry
... PTR-MS (Hansel et al., 1995; Lindinger et al., 1998) is a widely used state-of-the-art CIMS technique, primarily ap- plied to detect VOCs on-line with a high sensitivity and time resolution (de Gouw and Warneke, 2006; ... See full document
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Eddy covariance carbonyl sulfide flux measurements with a quantum cascade laser absorption spectrometer
... The determination of the total random flux uncertainty, which is due to the stochastic nature of turbulence and sen- sor noise, and the fraction of it that is due to sensor noise followed Langford et al. (2015), to which ... See full document
13
Determination of oceanic ozone deposition by ship-borne eddy covariance flux measurements
... relatively large scatter in the lag time results (due to poor cross-correlation results when small correlation exists between the ozone mixing ratio and the vertical wind component), the 1-hour averages and high ... See full document
15
Uncertainty of eddy covariance flux measurements over an urban area based on two towers
... Torni building itself: its main building is up to 15 m above the ground level, the tower up to 58 m and upper masonry ex- tending up to 66 m. The two EC systems (EC1 and EC2) were mounted on the opposite sides of an ... See full document
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Functional derivatives applied to error propagation of uncertainties in topography to large-aperture scintillometer-derived heat fluxes
... Acknowledgements. Matthew Gruber thanks the Geophysical Institute at the University of Alaska Fairbanks for its support during his Masters degree. We thank Flora Grabowska of the Mather library for her determination in ... See full document
11
Eddy covariance measurements of the sea spray aerosol flux over the open ocean
... volatility measurements indicates that the level of organics in the aerosol sampled was low; the sea-salt growth factors are thus assumed to be ...the eddy Figure ... See full document
16
Field intercomparison of two optical analyzers for CH 4eddy covariance flux measurements
... The QCLAS was connected to a scroll pump (TriScroll 600, Varian Inc., Italy) with a maximum pumping capacity of 420 lpm. As the QCLAS has no built-in pressure or flow control system, it is left to the user to deal with ... See full document
13
Evaluation of a lower-powered analyzer and sampling system for eddy-covariance measurements of nitrous oxide fluxes
... systems. Using a dryer on the intake line may degrade sys- tem frequency response but can eliminate uncertainties as- sociated with spectroscopic corrections for line broadening due to water vapour (Neftel et al., 2010) ... See full document
15
Development and validation of inexpensive, automated, dynamic flux chambers
... an eddy-covariance system, in a grassy clearing in the Duke Forest (Chapel Hill, ...Ozone-deposition measurements from the two meth- ods matched very well (4–10 % difference in mean flux rate) when ... See full document
14
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 ... See full document
14
Actual evapotranspiration and precipitation measured by lysimeters: a comparison with eddy covariance and tipping bucket
... camera lenses were often covered with small droplets. Weather conditions with drizzle or fog occur frequently at the study site. This is related to humid air masses from the Atlantic which are transported with the ... See full document
17
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 ... See full document
10
Infrared and millimetre-wave scintillometry in the suburban environment – Part 1: Structure parameters
... the scintillometer system to a certain extent, through comparison of trends and patterns of behaviour even if absolute values ...with energy clo- sure (Foken, ... See full document
21
Dead Sea evaporation by eddy covariance measurements vs aerodynamic, energy budget, Priestley–Taylor, and Penman estimates
... vapour measurements was expected for these ...other eddy covariance studies at other lakes, where a data availability between 36 and 56 % was reported ... See full document
21
Reviews and syntheses: Turning the challenges of partitioning ecosystem evaporation and transpiration into opportunities
... the eddy covariance data harmonization provided by CarboEuropeIP, FAO-GTOS-TCO, iLEAPS, the Max Planck Institute for Biogeochemistry, the National Science Foun- dation, the University of Tuscia, Universite´ ... See full document
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