The Global Climate Implications of Earth System Change in the Arctic

这一跨学科项目由一系列气候模型实验组成，旨在探索北极地表变化对大尺度气候特征的影响。该项目涉及已知植被-气候反馈的两个主要类别：对碳循环的影响，以及对地表和低层大气能量交换的影响。现有的工作主要是简单的概念性影响评估模型--该项目致力于通过在全球气候模型框架中隔离和评估北极陆地表面变化的远程影响来采取下一步行动。这项研究首先涉及模型开发，以改进在气候-动态植被耦合模型系统中北方生态系统中生物过程的表示。随后进行了模型模拟，以评估二氧化碳引起的高纬度变暖以及随后的北方植被变化对区域和全球的影响。一名研究生将得到支持，适用的结果将被纳入PI的教学课程。连接北极陆地和全球气候界，以及对正在进行的国际气候变化检测和评估进程的潜在投入，也可能产生更广泛的影响。

This interdisciplinary project consists of a series of climate model experiments that explore the impacts of arctic land-surface changes on large-scale features of climate. The project addresses the two primary categories of known vegetation-climate feedbacks: impacts on carbon cycling, and impacts on surface and lower atmosphere energy exchange. Existing work has been largely with simple conceptual models of impact assessment - this project endeavors to take the next step by isolating and assessing the remote impact of arctic land-surface change in a global climate model framework. The research first involves model development to improve the representation of biological processes in boreal ecosystems in a coupled climate-dynamic vegetation model system. This is followed by model simulations to assess the regional and global impacts of CO2-induced high-latitude warming and subsequent changes in boreal vegetation. A graduate student will be supported, and applicable results will be incorporated into the PI's teaching curriculum. Broader impacts may also result from bridging the Arctic terrestrial and global climate communities, and potential input to the ongoing international climate change detection and assessment process.