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利用涡动相关技术观测资料和同步的气象要素监测资料,分析了CO2的浓度日变化,描述了CO2通量的变化规律,探讨了风速、温度、动量通量、感热通量、潜热通量以及光合有效辐射对长白山森林生态系统CO2通量的影响,结果表明:在白天,CO2通量和梯度的输送方向是从大气向植被,在中午输送达到负的最大值。在夜间,CO2通量和梯度输送的方向与白天相反,并且,在早晨达到正的最大值。
Based on the observation data of the eddy covariance technology and the monitoring data of the meteorological elements, the diurnal variation of the CO2 concentration was analyzed. The variation of the CO2 flux was described. The effects of wind speed, temperature, momentum flux, sensible heat flux, latent heat flux And the effects of photosynthetically active radiation on the CO2 flux of forest ecosystem in Changbai Mountains. The results show that in the daytime, the fluxes and gradients of CO2 fluxes are from the atmosphere to the vegetation and reach the negative maximum at noon. At night, the CO2 flux and gradient are delivered in the opposite direction to the daytime and reach a positive maximum in the morning.