Collaborative Research: Rapid Climate Change During the Miocene as a benchmark to understand future climate change

合作研究：中新世期间的快速气候变化作为了解未来气候变化的基准

• 批准号: 2002493
• 负责人: Barbara Carrapa
• 金额: $ 30.17万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002493&HistoricalAwards=false
• 关键词: Collaborative; Research; Rapid; Climate; Change

The Miocene Climatic Optimum, between 18 and 13 million years ago, is one of Earth's most recent prolonged warming events with peak global surface temperature about 7 degrees Celsius (13 degrees Fahrenheit) above present and characterized by intervals of abrupt variability. Despite this warmer surface temperature, carbon dioxide concentrations were similar to forecasts of the coming decades while the configuration of continents on the global was quite similar to present-day. Therefore, this period of warmer climate may provide a useful benchmark to understand future climate change. The scientific results of this research will help clarify the impacts of warming on the South American Monsoon System may have on millions of people that presently depend on it for water resources. Through a series of large public lectures, this project will also increase awareness about the power of climate models for informing on future climate and environmental change. Furthermore, the project will provide content for undergraduate- and graduate-level courses and help grow the nascent Department of Geosciences at the University of Connecticut (UConn). With the potential impacts of this new data and the associated educational components, this project stands to significantly benefit society.Although understanding of the climate of this Miocene Climatic Optimum (MCO) is well documented through a variety of proxy records, the continental record remains poorly resolved. This data gap hinders our ability to distinguish the temperature responses between land and sea, and thus, limits our ability to use the MCO as an analog for future climate change. This project will therefore analyze the record of paleoclimate from the Central Andes preserved in the geochemistry, palynology, physical sedimentology and paleontology of ancient sand seas and paleo river and lake deposits at key localities in NW Argentina. The research team will combine this effort with a series of Miocene sensitivity experiments with the Community Earth System Model to test if CO2 driven warming is able to produce the geochemical and paleoenvironmental data or if other mechanisms, such as Antarctic ice volume and orbital changes, are required. This multidisciplinary research will provide insights into the causes and responses of rapid climate changes under climate warming.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

中新世的气候最佳最佳（18到1300万年前）是地球最近的延长变暖事件之一，全球峰值的峰值温度约为7摄氏度（13摄氏度（13华氏度）），并以突然可变性的间隔为特征。尽管表面温度更高，但二氧化碳浓度与未来几十年的预测相似，而全球大陆的构型与当今的构型非常相似。因此，这个温暖的气候时期可能会提供一个有用的基准来了解未来的气候变化。这项研究的科学结果将有助于阐明变暖对南美季风体系的影响可能对数百万目前依赖水资源的人产生。通过一系列大型的公开讲座，该项目还将提高人们对气候模型的力量通知未来气候和环境变化的认识。此外，该项目将为本科和研究生级课程提供内容，并帮助发展康涅狄格大学（UCONN）的新生地球科学系。随着这些新数据和相关的教育组成部分的潜在影响，该项目将极大地使社会受益。尽管了解中新世气候最佳的气候（MCO），但通过各种代理记录很好地证明了这一中新世气候最佳（MCO），但大陆记录仍然很差。这个数据差距阻碍了我们区分土地和海洋之间温度反应的能力，因此，我们将使用MCO用作未来气候变化的模拟能力限制了我们的能力。因此，该项目将分析在西北阿根廷关键地区的古代学，物理沉积学和古河和湖泊沉积物的地球化学，生理沉积学和古生物学中保存的中央气候记录。研究团队将与社区地球系统模型进行一系列中新世灵敏度实验相结合，以测试CO2驱动的变暖是否能够生成地球化学和古环境数据，或者需要其他机制（例如南极冰量和轨道变化）。这项多学科研究将提供有关气候变暖下快速气候变化的原因和反应的见解。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估的评估来支持的。