Gas Flux Measurement Using the Eddy Accumulation Method with Conditional Sampling.

Abstract

We applied the eddy accumulation theory with conditional gas sampling method for practicable gas flux measurement in natural condition. A new gas sampling system based on this theory was developed and the reliability of this method was checked. The coefficient b of the theory was calculated by using the sensible heat flux and the difference of averaged upward air temperature and downward one. The coefficient b has an almost constant value of 0.53. Sensible heat flux measured by the eddy accumulation showed a close agreement with that by the Bowen-ratio method.