Heat, Vapor, and CO2 Flux

Eddy covariance measurements

CS7500 CO2/H2O Open Path Gas Analyzer

CO2/H2O Open Path Gas Analyzer
  • CO2 and H2O open-path analyzer
  • Measures CO2 and H2O surface fluxes using eddy-covariance techniques
  • Includes SDM interface
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KH20 Krypton Hygrometer

Krypton Hygrometer
  • Highly sensitive hygrometer for measuring rapid fluctuations in atmospheric water vapor
  • Typically used with CSAT3 in Eddy Covariance systems
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About Heat, Vapor, and CO2 Flux

By finding the covariance between the vertical wind speed fluctuations with temperature as determined by the CSAT3 or CA27 (with 127TC) against humidity and carbon dioxide fluctuations, as measured by fast response sensors like a fine wire thermocouple (FW05), krypton hygrometer (KH20), or an open path CO2/H2O analyzer (CS7500), the sensible and latent heat flux, as well as vapor and CO2 fluxes, can be found. Virtual sensible heat flux can be determined by finding the covariance between the sonically determined temperature and vertical wind speed fluctuations.