水-气界面CO<sub>2<\/sub>通量监测的静态箱法与薄边界层模型估算法...

来自 : www.jlakes.org/html/2015/2/201 发布时间：2021-03-25

Abstract: Closed static chamber method and thin boundary layer method are frequently applied in monitoring air-water gas diffusive fluxes.However, there are differences in results between the methods due to theoretical principles which are still unclear.A type of closed static chamber was applied in Pengxi River, Three Gorges Reservoir to monitor air-water CO2 flux and compared with the results from thin boundary layer method that simultaneously monitored to discuss the causes for the differences.Results indicated that wind speed, air-water temperature difference, and depth of the water were the impact factors related to the difference between the methods above.It was found that the smaller difference between the methods above was created by the higher wind speed, or the greater air-water temperature difference, or the greater water depth.However, water surface area showed no significant impact on the difference between the methods.Through a comparison of CO2 fluxes data sets from the methods, it could be noted that there was a significant positive correlation on the monitoring results of the CO2 fluxes.But monitoring results from the closed static chamber method had higher variance compared to thin boundary layer method.From the viewpoint of the stability of the methods, the thin boundary layer method might be more feasible in the river-channel based reservoir area.
2015年2月13日摘要:模型估算法与静态箱法是水-气界面气体通量监测的主要方法, 因原理不同监测结果通常存在一定差异.目前对引起上述差异的主要环境因素仍不清晰.本研究使用自行设计...静态箱法; 薄边界层模型估算法; CO₂通量; 环境因素水