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Recurrence Analysis of Eddy Covariance Fluxes
2016Measuring 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. +3 more
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EClog: A handheld eddy covariance logging system
Computers and Electronics in Agriculture, 2006A 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. +3 more
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Disjunct Eddy Covariance Method
2011The 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
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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
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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
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Eddy Covariance Measurements over Lakes
2011We give an overview on the status of eddy covariance measurements over lake surfaces with a focus on CO2 fluxes. Inland waters have a significant role in the sequestration, transport, and mineralization of organic carbon (Battin et~al. 2009; Tranvik et~al. 2009).
Timo Vesala, Werner Eugster, Anne Ojala
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Eddy Covariance Measurements over Crops
2011Croplands are managed ecosystems with rapid development over the course of the growing season under nearly optimal growth conditions with respect to nutrient availability (fertilization), water availability (possible irrigation in dry conditions), competition (monocultures where herbicide and fungicides applications keep other competitors off the plot)
Christine Moureaux +6 more
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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.
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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.
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Eddy Covariance Measurements over Wetlands
2011Wetland ecosystems can be classified according to various systems, one of which defines three major groups: (1) northern peatlands (with a total area of 350×106 ha), (2) freshwater swamps and marshes (204×106 ha), and (3) coastal wetlands (36×106 ha) (Mitsch et~al. 2009).
Tuomas Laurila +2 more
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Exploring Eddy-Covariance Measurements Using a Spatial Approach: The Eddy Matrix
Boundary-Layer Meteorology, 2016Taylor’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
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Eddy Covariance Measurements Over Urban Areas
2011Throughout the last two decades, numerous research projects applied the eddy covariance (EC) approach to urban ecosystems to directly measure turbulent fluxes between the urban surface and the atmosphere to quantify the exchange of energy, water vapor, greenhouse gases, air pollutants, and aerosols in connection with the assessment of (air pollutant ...
Feigenwinter, Christian +2 more
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