BIOCOMPLEXITY: Feedbacks Between Ecosystems and the Climate System

该项目将描述和量化陆地生态系统、气候系统和空气污染之间的反馈机制，包括水、能源和各种化学物质的循环。将开发一个耦合模型，将动态陆地水文学和生态学、物理气候（大气和海洋）和大气化学联系起来，该模型还可能是唯一的，包括与土地使用变化和排放预测和政策的双向联系。该模型将用于量化空气污染和气候变化对全球植被生产力和分布的综合影响。认识到各种反馈过程中存在很大的不确定性，主要研究者（PI）Prinn和Melillo博士将对其结论的敏感性进行全面分析，并提供关键模型输出变量的概率分布。PI希望这项研究提供重要信息，以了解我们未来的全球环境将如何在世界人口增长，技术和农业实践变化以及经济发展的共同影响下演变。该项目得到了环境中生物复杂性：耦合生物地球化学循环研究方案的支持。

This project will characterize and quantify the feedback mechanisms among terrestrial ecosystems, the climatic system, and air pollution involving cycles of water, energy, and various chemical species. A coupled model that links dynamic terrestrial hydrology and ecology, physical climate (atmosphere and ocean), and atmospheric chemistry will be developed that also, and perhaps, uniquely, includes two-way linkages with land-use change and emissions prediction and policy. The model will be used to quantify the combined effects of air pollution and climate change on the productivity and distribution of vegetation globally. Recognizing the large uncertainties in various feedback processes, the principal investigators (PIs), Drs. Prinn and Melillo, will undertake a comprehensive analysis of the sensitivity of their conclusions, and provide probability distributions for the key model output variables. The PIs expect this research to provide significant information for understanding how our future global environment will evolve under the joint effects of growing world population, changing technological and agricultural practices, and economic development. This project is being supported through the Biocomplexity in the Environment: Coupled Biogeochemical Cycles Research Program.