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Eddy Covariance Method

Eddy Covariance The measurement of weather not only relies on measurements at particular points but also researchers need to know how these conditions arise.

Various techniques used to assist in these studies rely on the measurement of surface fluxes of heat momentum, carbon dioxide and water vapour. The most common technique to measure these fluxes is the Eddy Covariance method.

To make these measurements you need at least an infra-red gas analyser and an anemometer capable of monitoring wind in the vertical and horizontal axis, with a fast response above 20 Hz.

Three axis anemometers are available from Gill with data rates up to 100Hz,and extensive networks have been set up world-wide to study important ecosystems which contribute to the carbon cycle. These systems are controlled by specially written software that calculates the surface fluxes of momentum, sensible and latent heat and carbon dioxide.

For more information about Gill 3-axis anemometers for eddy covariance applications, please click eddy covariance.

Eddy Covariance Method

HS100 Umist Eddy Covariance Method Test Site UK

WindMaster Pro - Eddy Covariance Method site, Siberia

Eddy Covariance method
R3-50 anemometer, located at the Northern most edge of the Sahara desert.
www.amma-international.org
Temperatures during May reach +50ºC in the shade!
Picture courtesy of: Centre of Ecology and Hydrology, Wallingford

Gill R3 Asymetric anemometer at eddy covariance Tundra Site, Northern Sweden. www.ans.kiruna.se
Temperatures drop to -30ºC in January, with wind speeds of 25m/s.
Picture courtesy of: Centre of Ecology and Hydrology, Wallingford

Gill R3-50 anemometer at eddy covariance method Tundra site, Northern Sweden. www.abacus-ipy.org
Picture courtesy of: Centre of Ecology and Hydrology, Wallingford