Methods of calibrating infrared CO2 analysers for sensitivity to CO2 and water vapour are described. Equations to correct eddy covariance CO2 flux measurements are presented for: (i) analyser cross-sensitivity to water vapour and the effects of density fluctuations arising from atmospheric fluxes of
Dry-air boundary conditions for correction of eddy flux measurements
โ Scribed by S. D. Smith; E. P. Jones
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 283 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0006-8314
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โฆ Synopsis
For measurements of eddy fluxes in the atmospheric boundary layer of gases (such as C02) whose average concentration is very large compared to the fluctuations, corrections for air density fluctuations are required. With the boundary condition of no flux of dry air at the surface, the evaporation correction to eddy fluxes is 2.6 times larger than has been estimated with the boundary condition of no mass flux at all at the surface. The heat flux correction is also increased by a few per cent.
๐ SIMILAR VOLUMES
The axis labels in Figure on p. 71 were interchanged, i.e., the y-axis should be H and the x-axis should be hE. As a result, the sentence beginning on line 6, p. 72 should read: Flux corrections increase with hE at any value of H for an analyser insensitive to water vapour (Figure ), whereas they d