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监测地气间动量、热量和痕量气体等的交换对水文、气象和生态环境等有着重要的意义。阐述了一种利用自行研制的大口径闪烁仪(LAS)、光学温度梯度仪和基于可调谐二极管激光吸收光谱术(TDLAS)的开放光路痕量气体监测系统,实现了较大区域热通量和二氧化碳等气体通量快速监测的方法。实验结果表明,所测数据与涡动相关(EC)仪的数据比较,显热通量的相关系数为0.91,二氧化碳通量的相关系数为0.74。由此,用大口径闪烁仪监测区域热通量和基于TDLAS光学技术连续可靠监测陆地区域碳通量是完全有可能的,这种方法在大区域热通量和气体通量监测将会有很好的应用前景。
The monitoring of the exchange of momentum, heat and trace gases is of great significance to hydrology, meteorology and ecological environment. A large aperture scintillation spectrometer (LAS), an optical temperature gradient meter and an open-circuit trace gas monitoring system based on tunable diode laser absorption spectroscopy (TDLAS) are described in this paper. The large area heat flux and Carbon dioxide and other gas flux rapid monitoring methods. The experimental results show that the correlation between measured data and eddy covariance (EC) instrument is 0.91 for sensible heat flux and 0.74 for carbon dioxide flux. As a result, it is entirely possible to monitor regional heat flux with a large-aperture scintillator and to continuously and reliably monitor carbon fluxes in the terrestrial region based on TDLAS optical technology. This method will have a very large heat flux and gas flux monitoring Good application prospects.