Transitions: A Study of the Spatial and Temporal Transition of Climate and Ecosystems in the Circumpolar Arctic

摘要：OPP-9732126,9732461 Chapin，林奇大学。阿拉斯加大学科罗拉多州这个项目旨在检验主要假设，即大气、生态系统、雪、永久冻土和土壤之间的表面能量和水分交换是在季节到十年的时间尺度上将陆地表面与气候耦合的主要机制。了解这种交流的特点、机制和反馈过程对于将其影响纳入泛北极气候变化的预测工具是必要的。该提案将全面审视地表能量和水分收支的研究，包括实地数据的收集、详细的数据分析、模型的开发以及空间和时间外推。绩效指标计划将实地工作与模拟工作紧密结合，同时对生态系统和自然气候系统进行调查。

Abstract OPP-9732126, 9732461 CHAPIN, LYNCH UNIV. ALASKA, UNIV. COLORADO This project is designed to test the primary hypothesis that the surface energy and moisture exchange between atmosphere, ecosystem, snow, permafrost, and soil is the principal mechanism for coupling the land surface to the climate on seasonal to decadal timescales. Understanding the characteristics, mechanisms and feedback processes of this exchange is necessary to incorporate their effects into predictive tools for pan-Arctic climate change. This proposal will take a comprehensive view of the study of the land surface energy and moisture budgets, involving collection of field data, detailed data analysis, model development, and spatial and temporal extrapolation. The PIs plan to integrate the field work closely with the simulation work, and investigations of ecosystems and physical climate systems are undertaken together.