摘要
陆地生态系统碳循环是全球变化研究中的重要组成部分,多种模型已用于陆地生态系统碳循环的模拟。文中着重论述了陆地生物圈碳循环模型CARAIB的原理、方法及其应用和最新进展。CARAIB模型主要是基于叶面光合作用子模型、冠层子模型和木质呼吸作用3个子模型的耦合,应用大气环流模式气候数据模拟出生态系统碳存储量和生物群区分布。介绍了欧洲利用植物数字化地理配准数据库重新划分植物群组(BAGs)的方法,比较BAGs与传统的植物功能型(PFTs)划分在方法上的差异,根据植物群组应用CARAIB模型进行生物群区分布模拟,并提出利用CARAIB模型模拟我国陆地碳循环和生物群区分布的可行性,为研究中国植被对气候变化的响应模型和预测提供区域尺度的新方法。
Terrestrial carbon cycle is an important aspect in the research of global changes. In the paper, the principle and application of the model CARAIB are described. The model is based on the coupling of following three sub-models ： a leaf photosynthesis sub-model including estimates of stomatal conductance and leaf respiration, a canopy sub-model describing principally the radiative transfer through the foliage, and a wood respiration sub-model. Coupling of the atmospheric general circulation model, CARAIB is used to reconstruct the distribution of global vegetation and carbon stocks of the biosphere. Currently, a new method for dividing plant function types is applied to the model by using plant georeferenced data to define the plant groups in Europe, and it is denominated as Bioclimatic Affinity Groups （ BAGs）, whose division is based on modern plants classes and their homologous pollen with corresponding parameters. The difference between BAGs and traditional Plant Functional Types for defining plant groups is compared. The feasibility to apply CARAIB model with BAGs to simulate China＇ s terrestrial carbon cycle and the distribution of biomes is brought forward, to provide a new application for studying Chinese plants to respond and forecast global climate change.
出处
《热带地理》
2007年第6期483-488,共6页
Tropical Geography
基金
国家自然科学基金重点项目资助(40331011)
