Inventors:
George Burba - Lincoln NE, US
Dayle McDermitt - Lincoln NE, US
Anatoly Komissarov - Lincoln NE, US
Tyler G. Anderson - Lincoln NE, US
Liukang Xu - Lincoln NE, US
Bradley A. Riensche - Firth NE, US
Assignee:
Li-Cor, Inc. - Lincoln NE
International Classification:
G01N 31/00
US Classification:
702 23, 702 24, 702 50, 702137, 73 106, 73 2328
Abstract:
Disclosed embodiments of the present invention provide means to obtain correct gas density and flux measurements using (i) gas analyzer (open-path, or closed-path gas analyzers with short intake tube, for example 1 m long, or any combination of the two); (ii) fast temperature or sensible heat flux measurement device (such as, fine-wire thermocouple, sonic anemometer, or any other device providing fast accurate gas temperature measurements); (iii) fast air water content or latent heat flux measurement device (such as, hygrometer, NDIR analyzer, any other device providing fast accurate gas water content measurements); (iv) vertical wind or sampling device (such as sonic anemometer, scintillometer, or fast solenoid valve, etc. ) and (v) algorithms in accordance with the present invention to compute the corrected gas flux, compensated for T-P effects. In case when water factor in T-P effects is negligible, the fast air water content or latent heat flux measurement device (item iii in last paragraph) can be excluded.