历史和未来百年尺度的植被碳水通量与气候的相互作用机制及关键区研究

The down regulation mechanism of vegtation leaves in response to carbon dioxide change is incorporated into the global atmosphere-ocean-land coupled model designed by Chinese scientists.The new photosyntheis scheme will be revised, coupled to climate models and validated against data. Based on the numerical experiments, the key regions of interacion between vegetation carbon and water flux and climate will be presented. The present and future 100-year scale mechanism of vegetation carbon and water flux in response to climate change and affecting climate change will be explored. The impact of vegetatoin density in increasing carbon dioxide concentration on climate change will be also studied. The future mid to high emission scenarios of carbon dioxide is used to study the spatiotemporal change of vegetation carbon and water flux as well as its interactive discrepancy with monsoon climate. The porposal intend to provide scientific data support for accurate estimation of present and future change of vegeation carbon and water flux in semi-arid regions, arid regions, boreal forests and monsoon regions,to provide scientific baseline for the interaction mechanism between vegetation and climate in these key regions, and to provide relevant caron and water flux data for climate negotiation of China.

在我国科学家开发设计的全球海陆气耦合模式系统里引入植被叶片对二氧化碳浓度响应的光合下调机制，修改并完成新光合方案的耦合和验证，根据数值试验给出植被碳水通量和气候相互作用强度的关键区，对历史和未来百年尺度的植被碳水通量对气候的响应和影响机制进行模拟研究，对二氧化碳浓度升高植被密度的气候效应进行数值试验，研究未来二氧化碳高排放和中等排放强度下的植被碳水通量的时空变化特征及其与季风气候的相互作用机理的差异，为准确估算干旱半干旱区、北方森林区和季风区的植被碳水通量历史和未来变化提供科学数据支撑，为耦合模式在上述关键区的植被大气相互过程机理研究提供模拟参考结果，为国家的气候谈判提供相应的碳通量和水汽通量数据。

在我国科学家开发设计的全球海陆气耦合模式系统里引入了植被叶片对二氧化碳浓度响应的光合下调机制，修改并完成了新光合方案的耦合和验证，根据数值试验给出了植被碳水通量和气候相互作用强度的关键区。利用耦合模式对历百年尺度的植被碳水通量对气候的响应和影响机制进行模拟研究，对二氧化碳浓度升高植被密度的气候效应进行数值试验，探索了未来二氧化碳升高背景下的植被碳水通量的时空变化特征及其与季风气候的相互作用机理的差异，为准确估算干旱半干旱区、北方森林区和季风区的植被碳水通量历史和未来变化提供了科学数据支撑，所得结果为耦合模式在上述关键区的植被大气相互过程机理研究提供模拟参考结果，可为国家的气候谈判提供相应的碳通量和水汽通量数据。