GAS CONCENTRATION FLUX MEASURING DEVICE

摘要

[PROBLEMS] To provide a gas concentration flux measuring device for measuring a wide region such as a forest without being affected by a coexistent material, which device has a high response and an excellent measurement stability. [MEANS FOR SOLVING PROBLEMS] The gas concentration flux measuring device includes: a laser light source; a laser output control device; a wavelength modulation control device; a first light reception device; a first DC component detector; a first wavelength modulator/demodulator; an optical system; a reference cell; a second light reception device; a second DC component detector; a second wavelength modulator/demodulator; a third wavelength modulator/demodulator; an analysis device; an adder; temperature measuring means; pressure measuring means; and flow rate measuring means for directly measuring the gas flow rate components in horizontal two directions and the gas flow rate component in the perpendicular direction in the measurement region and outputting the measurement signals to the analysis device. The analysis device performs analysis based on the vortex correlation rule by using the signals inputted from the flow rate measuring means and calculates the kinetic momentum flux and concentration of the gas by using the analysis result.