长白山森林生态系统二氧化碳通量与涡动相关研究

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。

The Research of Carbon Dioxide Flux and Eddy Covariance in Forest Ecological System of Changbai Mountain

Based on the observation data by the open-path eddy covariance(OPEC) system and the synchronous monitoring data of meteorological elements,the authors analyzed the diurnal variation,monthly variation and seasonal variation of the concentration of CO 2.The authors described the variation rule of CO 2 flux,then discussed the influence of wind speed,temperature,momentum flux,sensible heat flux,latent evapotranspiration and PAR to the CO 2 flux in forest ecological system of Changbai mountain.The results showed that the transport direction of CO 2 flux and gradient was from the atmosphere to the vegetation,with a negative maximum at noon.At nignttime,the transport direction of CO 2 flux and gradient was opposite to the transport dirention at daytime,with a positive maximum in the morning.The wind speed and temperature had great influence on CO 2 flux,the relationship of among CO 2 flux and momentum flux,sensible heat flux,latent evapotranspiration as well as PAR were pretty good.