The Global Climate Implications of Earth System Change in the Arctic

北极地球系统变化对全球气候的影响

• 批准号: 0840048
• 负责人: Peter Snyder
• 金额: $ 21.74万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-04-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0840048&HistoricalAwards=false
• 关键词: Global; Climate; Implications; Earth; System

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.

这个跨学科的项目包括一系列气候模型实验，探索北极陆地表面变化对大尺度气候特征的影响。该项目涉及两大类已知的植被-气候反馈：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影响评估概念模型-本项目努力采取下一步行动，在全球气候模型框架内分离和评估北极陆地表面变化的远程影响。这项研究首先涉及模型开发，以提高在耦合的气候动力植被模式系统中的北方生态系统的生物过程的代表性。 随后进行模型模拟，以评估CO2引起的高纬度变暖和随后的北方植被变化对区域和全球的影响。 研究生将得到支持，适用的结果将被纳入PI的教学课程。 更广泛的影响还可能来自于北极陆地和全球气候社区之间的联系，以及对正在进行的国际气候变化探测和评估进程的潜在投入。