以基于过程的BEPS模型为基础,根据长白山温带阔叶红松林生态系统的生态过程机制,建立了能够描述半小时尺度生态系统通量日变化的模拟模型BEPS.应用该模型对2003年长白山温带阔叶红松林生长季内的CO2和水热通量的模拟结果表明:模型模拟的净生态系统生产力(NEP),潜热通量(LE),显热通量(Hs)与涡度相关系统的实测数据相关性较好,R2值分别达到0.68,0.75,0.71.模拟的长白山温带阔叶红松林生态系统的年累积NEP为300.5gC·m?2,与实测值也非常接近,说明应用该模型可以较好地模拟长白山温带阔叶红松林生态系统的CO2,水和热量交换过程.根据模型对不同气候变化情景下的NEP和蒸散(ET)的分析得出:长白山温带阔叶红松林生态系统的NEP对气候变化比较敏感,在气候变暖条件下该生态系统的碳汇功能可能会减弱.此外,作为基于过程的模型,BEPS对最大羧化速率(Vcmax)和最大气孔导度(gmax)等植物生理生态特征参数的变化反应也比较敏感. Based on the process-based BEPS model and based on the ecological process mechanism of the temperate broad-leaved Korean pine forest ecosystem in Changbai Mountains, a simulation model BEPS that can describe the diurnal variation of ecosystem fluxes at semi-hour scale was established. By using this model, Simulation results of CO2 and water heat flux during the growing season of Pinus koraiensis plantation showed that the simulated net ecosystem productivity (NEP), latent heat flux (LE), sensible heat flux (Hs) and eddy covariance The correlation coefficient is good and the R2 values ​​reach 0.68,0.75,0.71 respectively.The annual cumulative NEP of the temperate broad-leaved Korean pine forest ecosystem in Changbai Mountains is 300.5gC · m -2, which is close to the measured value, indicating that the model can be used Which can simulate the process of CO2, water and heat exchange in the temperate broad-leaved Korean pine forest ecosystem in Changbai Mountain.According to the model analysis of NEP and ET in different climate change scenarios, NEP is sensitive to climate change and its carbon sequestration function may be weakened under climatic warming conditions.In addition, as a process-based model, the maximum carboxylation rate (Vcmax) and maximum stomatal conductance (gmax) and other plant physiological and ecological characteristics of the response parameters are also more sensitive.