Noah-MP陆面过程模式对西双版纳热带雨林下垫面碳水热通量的模拟评估

Assessment of the Noah-MP Land Surface Process Model Simulation Performance on the Carbon,Water and Heat Fluxes of the Xishuangbanna Tropical Rain Forest

陆地植被生态系统是气候系统的重要组成部分,准确模拟植被与大气间碳水热通量交换对提高气候预测具有重要意义。本研究使用西双版纳热带雨林站近地层综合观测资料,评估了Noah-MP模式中72组不同参数化方案组合对碳水热通量的模拟能力。在此基础上,利用Tukey’s检验方法,对比分析了4个物理过程的不同参数化方案对模拟碳水热通量的影响。结果表明:Noah-MP模式能较好的模拟西双版纳站碳水热通量,参数化方案选择对干季碳水热以及湿季热通量模拟影响较大;不同的近地层湍流交换方案和土壤湿度限制气孔阻抗方案对模拟结果的影响最为显著。

The terrestrial vegetation ecosystem is an important part of the climate system. Accurately simulating the exchange of carbon,water and heat flux between vegetation and the atmosphere is of great significance for improving climate prediction. In this study,using the comprehensive observation data of the near-surface layer at the Xishuangbanna Tropical Rainforest site,the simulation capabilities of 72 sets of different parameterization scheme combinations in the Noah-MP model were evaluated for carbon,water,and heat flux. On this basis,using Tukey’s test method,the influence of different parameterization schemes of 4 physical processes on the simulation results was compared and analyzed. The results showed that the Noah-MP model can reasonably simulate the carbon,water,and heat fluxes of Xishuangbanna site,and the parameterization scheme combinations had a greater impact on the dry season carbon,water,and heat flux and wet season heat flux;the influence of different near-surface turbulence exchange and soil moisture limiting stomatal resistance schemes had significant effect on the simulation results.