Collaborative Research: Dunefield Records of Late Quaternary Climatic Change, Northern China

合作研究：中国北方晚第四纪气候变化的沙丘记录

• 批准号: 0502489
• 负责人: Joseph Mason
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0502489&HistoricalAwards=false
• 关键词: Collaborative; Research; Dunefield; Records; Late

The objective of this project is to develop new records of late Quaternary climatic change. It is designed specifically to yield a composite record of dune activity and associated hydrologic change and dust production from the Last Glacial Maximum to the present, as well as indicating past changes in the East Asian monsoon circulation. These results will derive from stratigraphic and geomorphic evidence preserved in dune fields distributed across northern China. The work will be undertaken collaboratively by scientists in North America and China, and will promote training and learning through the involvement of graduate and undergraduate students in both laboratory and field work. Questions this research is designed to resolve are: a) the relative magnitude of change in the monsoon system at orbital and millennial timescales; b) the timing and abruptness of change at the orbital timescale and the degree to which they are reproduced by model experiments, and c) the synchroneity of millennial-scale climatic change across northern China, as well as on hemispheric and global scales. While the record at any given study site may be incomplete and open to multiple interpretations, a composite record from many different geomorphic settings is expected to provide relatively straightforward, potentially quantitative paleoclimatic information. This landscape-scale record will also be valuable in assessing the importance of land-surface feedbacks in the monsoon system.

该项目的目标是开发晚第四纪气候变化的新记录。它是专门设计的，以产生一个复合记录沙丘活动和相关的水文变化和粉尘生产从末次盛冰期到现在，以及表明过去的东亚季风环流的变化。这些结果将来自分布在中国北方的沙丘地中保存的地层和地貌证据。这项工作将由北美和中国的科学家合作开展，并将通过研究生和本科生参与实验室和实地工作来促进培训和学习。本研究旨在解决的问题是：a）季风系统在轨道和千年时间尺度上变化的相对幅度; B）在轨道时间尺度上变化的时间和连续性以及它们被模式实验再现的程度;以及c）中国北方以及半球和全球尺度上千年尺度气候变化的同步性。虽然在任何给定的研究地点的记录可能是不完整的，并开放多种解释，从许多不同的地貌设置的复合记录预计将提供相对简单的，潜在的定量古气候信息。这种大尺度的记录对于评估季风系统中陆面反馈的重要性也很有价值。