Carbon Dioxide Flux Measurement Systems (CO2Flux) Handbook

Fischer, M

Pacific Northwest National Laboratory (U.S.)

关键词: Carbon Dioxide;    Soils;    Anemometers;    54 Environmental Sciences;    Manuals;   

DOI  :  10.2172/1020279
RP-ID  :  DOE/SC-ARM/TR-048
RP-ID  :  DE-AC05-7601830
RP-ID  :  1020279

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Southern Great Plains (SGP) carbon dioxide flux (CO2 flux) measurement systems provide half-hour average fluxes of CO2, H2O (latent heat), and sensible heat. The fluxes are obtained by the eddy covariance technique, which computes the flux as the mean product of the vertical wind component with CO2 and H2O densities, or estimated virtual temperature. A three-dimensional sonic anemometer is used to obtain the orthogonal wind components and the virtual (sonic) temperature. An infrared gas analyzer is used to obtain the CO2 and H2O densities. A separate sub-system also collects half-hour average measures of meteorological and soil variables from separate 4-m towers.