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

摘要 CHAPIN-9732126，9732461 CHAPIN，LYNCH UNIV. ALASKA，UNIV.科罗拉多 该项目旨在检验大气、生态系统、雪、永冻层和土壤之间的表面能量和水分交换是在季节到十年时间尺度上将陆地表面与气候耦合的主要机制这一基本假设。 了解这种交换的特征、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。 这项建议将全面研究地表能量和水分收支，包括收集实地数据、详细的数据分析、模型开发以及空间和时间外推。 PI计划将实地工作与模拟工作紧密结合起来，并一起进行生态系统和物理气候系统的调查。

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.