Results 241 to 250 of about 327,544 (281)

Eddy-Covariance Measurements

2021
The eddy-covariance method represents the only direct way to measure the turbulent fluxes of momentum, temperature, trace gases, and particles between the land surface and the atmosphere. It is a direct measurement of the net carbon-dioxide budget and dry deposition.
Matthias Mauder, Thomas Foken, Marc Aubinet, Andreas Ibrom   +3 more
openaire   +1 more source

MEASURING TREE AND VINE ET WITH EDDY COVARIANCE

Acta Horticulturae, 2000
The eddy covariance method is a viable method to measure evapotranspiration from tree and vine crops. However, one must be careful to measure properly the energy balance components and to apply corrections to the heat flux data to obtain good results. Based on several years of experience with energy balance measurements, we have found that failure to ...
SNYDER R. L., PAW U. K. T., DUCE P., SPANO, Donatella Emma Ignazia, FERREIRA M. I., PACO T. A., DO CONNELL J. H.   +6 more
openaire   +5 more sources

Exploring Eddy-Covariance Measurements Using a Spatial Approach: The Eddy Matrix

Boundary-Layer Meteorology, 2016
Taylor’s frozen turbulence hypothesis states that “standard” eddy-covariance measurements of fluxes at a fixed location can replace a spatial ensemble of instantaneous values at multiple locations. For testing this hypothesis, a unique turbulence measurement set-up was used for two measurement campaigns over desert (Namibia) and grassland (Germany) in ...
Christian Engelmann, Christian Bernhofer
exaly   +2 more sources

The Eddy Covariance Method

2011
The eddy covariance method for measuring exchanges of heat, mass, and momentum between a flat, horizontally homogeneous surface and the overlying atmosphere was proposed by Montgomery (1948), Swinbank (1951), and Obukhov 1951). Under these conditions, net transport between the surface and atmosphere is one-dimensional and the vertical flux density can ...
Thomas Foken, Marc Aubinet, Ray Leuning
openaire   +1 more source

Recurrence Analysis of Eddy Covariance Fluxes

2016
Measuring energy and matter fluxes between the atmosphere and vegetation using the Eddy Covariance (EC) technique is the state-of-the-art method to quantify carbon exchange between terrestrial ecosystems and their surrounding. The EC equipment is usually mounted onto a flux tower reaching higher than the local canopy.
Flach, M., Lange, H., Foken, T., Hauhs, M.   +3 more
openaire   +2 more sources

EClog: A handheld eddy covariance logging system

Computers and Electronics in Agriculture, 2006
A new eddy covariance logging (EClog) system has been developed based on a handheld computer. The logging program, written in C language, reads the digital data from the sonic anemometer and writes it to a CompactFlash card, at the same time showing instantaneous data, means and fluxes on the screen.
van der Molen, M.K., Zeeman, M.J., Lebis, J., Dolman, A.J.   +3 more
openaire   +2 more sources

RuFlux: The Network of the Eddy Covariance Sites in Russia

Izvestiya Rossiiskoi Akademii Nauk Seriya Geograficheskaya, 2023
For the first time, the information is summarized on the history of establishment, the state of observations and the main scientific results on sites included in RuFlux, the Russian eddy covariance network for the monitoring of greenhouse gases (GHG). Eddy covariance technique provides estimates of GHG fluxes at the level of ecosystems.
O. A. Kuricheva, V. K. Avilov, A. V. Varlagin, M. L. Gitarskiy, A. A. Dmitrichenko, E. A. Dyukarev, S. V. Zagirova, D. G. Zamolodchikov, V. I. Zyryanov, D. V. Karelin, S. V. Karsanaev, I. N. Kurganova, E. D. Lapshina, A. P. Maksimov, T. Ch. Maximov, V. V. Mamkin, A. S. Marunich, M. N. Miglovets, O. A. Mikhailov, A. V. Panov, A. S. Prokushkin, N. V. Sidenko, A. V. Shilkin, Yu. A. Kurbatova   +23 more
openaire   +1 more source

Principle of Eddy Covariance

2012
This chapter examines the relationship between eddy covariance calculations and the concept of net ecosystem exchange. Eddy covariance is a class of micrometeorological method that measures the fluxes of energy, water, and trace gases between the earth’s surface and the atmosphere.
openaire   +1 more source

Disjunct Eddy Covariance Method

2011
The eddy covariance method (EC) requires that all frequencies of turbulent motions and trace gas variations contributing to the flux are resolved by the measurement system. In conventional EC systems this is achieved by using anemometers and gas analyzers with fast response time and high data sampling frequency in order to catch the high-frequency end ...
Janne Rinne, Christof Ammann
openaire   +1 more source

An Eddy Perspective of Global Air-Sea Covariation

Journal of Meteorological Research, 2021
Mesoscale eddies are widely distributed in the global ocean. They affect the ocean flow field and material transport, and play an important role in the energy transfer between the ocean and the atmosphere. With the development of high-resolution satellite observations, many regional studies are emerging on the coupling effects between mesoscale eddies ...
Jianjie Liu, Ge Chen, Guiyan Han, Bentao Zhang   +3 more
openaire   +1 more source