| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a gas concentration flux measuring apparatus that measures a wide area, such as a forest, is not affected by any coexisting substance, has high response properties and improved measurement stability. <P>SOLUTION: The gas concentration flux measuring apparatus comprises: a laser light source; a laser output control unit; a wavelength modulation control unit; a first light reception apparatus; a first DC component detector; a first wavelength modulator/demodulator; an optical system; a reference cell; a second light reception apparatus; a second DC component detector; a second wavelength modulator/demodulator; a third wavelength modulator/demodulator; an analyzer; an adder; a temperature measuring means; a pressure measuring means; and a flow rate measuring means for directly measuring a flow rate component in the two horizontal directions of gas flow in a measurement region and a flow speed component in the vertical direction and outputting the measurement signals to an analyzer. The analyzer performs an analysis based on an eddy correlation rule, by using a signal inputted from the flow rate measuring means, and determines a momentum flux and concentration of gas to be measured, by using the analysis result by computation. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
