Collaborative Research: Water Balance of western North America: Dynamics of the Miocene summer monsoon

合作研究：北美西部水平衡：中新世夏季季风的动力学

• 批准号: 0450211
• 负责人: Mitchell Lyle
• 金额: $ 28.46万
• 依托单位: Boise State University
• 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: 2005-02-15 至 2007-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0450211&HistoricalAwards=false
• 关键词: Collaborative; Research; Water; Balance; western

0450211LyleThis project focuses on the analysis of the water balance in the Western U.S. during Miocene time through the application of an innovative approach that links changes in precipitation patterns to sea surface temperature (SST) variations in the eastern Pacific and Gulf of Mexico. In contrast to the prevailing arid climate of the modern Western U.S., conditions during middle Miocene time were far wetter despite similar atmospheric carbon dioxide levels. This project will determine how SST variations affect the net transfer of water from ocean to land by using existing Ocean Drilling Program sediment cores to reconstruct a SST time series for the middle and late Miocene, by groundtruthing the time series using terrestrial proxies for climate change, and by applying both regional and global climate models to simulate the impact of SST variations on climate conditions in the Western U.S. The project will produce the first well-constrained SST record for Miocene time and will provide modeling results that hindcast Miocene climate conditions and that may also be applied in a predictive sense to determine the potential impact of warming episodes on the future aridity of the Western U.S. Broader impacts of the project include linkages between the water cycle and regional climate change, support for relatively recent PhDs as principal investigators, and training of graduate and undergraduate students.

0450211 lyhethis项目通过应用创新方法，将降水模式的变化与墨西哥东部太平洋和海湾的海面温度变化（SST）变化联系起来，重点介绍了中新世时期美国西部水平平衡的分析。 与现代美国西部的普遍干旱气候相反，尽管大气中的二氧化碳水平相似，但中新世时期的条件却湿润得多。该项目将通过使用现有的海洋钻井程序岩心来确定SST变化如何影响水从海洋到陆地的净转移，以通过对中新世晚期和晚期进行重建SST时间序列，使用陆地代理进行气候变化的时间序列，并应用区域性和全球气候模型，以模拟SST变体的影响，并将其构成SST变异的影响，以使其在美国及格的影响中构成了SST变体的影响。中新世时间，并将提供建模结果，使中新世的气候条件具有预期性，并且还可以以预测的意义应用，以确定温暖情节对该项目的更广泛影响的潜在影响，包括水循环和区域气候变化之间的更广泛的联系，包括最新的PHD，作为主要研究人员作为主要研究人员和培训毕业生和培训学生和培训学生。