Field comparison of disjunct and conventional eddy covariance techniques for trace gas flux measurements.
Environ Pollut
; 152(3): 630-5, 2008 Apr.
Article
em En
| MEDLINE
| ID: mdl-17707112
ABSTRACT
A field intercomparison experiment of the disjunct eddy covariance (DEC) and the conventional eddy covariance (EC) techniques was conducted over a grass field. The half-hourly water vapor fluxes measured by the DEC were within the estimated uncertainty from the fluxes measured by the EC. On the average there was a slight overestimation (<10%) of the fluxes measured by the DEC during the day and underestimation during the night as compared to the fluxes measured by the EC. As this bias does not appear in the simulated DEC measurements it is likely to be due to instrumental problems. The insensitivity of the quality of the fluxes measured by the DEC method to the deficiencies in the gas analysis shows the robustness of this new approach for measuring the surface-atmosphere exchange of trace gases.
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Base de dados:
MEDLINE
Assunto principal:
Algoritmos
/
Monitoramento Ambiental
/
Movimentos do Ar
/
Poluentes Atmosféricos
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article