Collaborative Research: Deglacial and Holocene Environmental Change in California's Headwaters: Insights from High-Resolution Sedimentary Records from Mono Lake

合作研究：加利福尼亚州源头的冰消期和全新世环境变化：莫诺湖高分辨率沉积记录的见解

• 批准号: 1828862
• 负责人: Susan Zimmerman
• 金额: $ 17.88万
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1828862&HistoricalAwards=false
• 关键词: Collaborative; Research; Deglacial; Holocene; Environmental

As droughts, floods, and wildfires increase in frequency, intensity, and devastation, new emphasis must be placed on understanding the climate system of the American West. This project will study sediments from the Mono Basin, the most important water source for California. Located in the eastern Sierra Nevada, Mono Lake is highly sensitive to changes in the amount of precipitation falling in the region. The project will develop well-dated lake data to compare with climate models for the last ~16,000 years to study the mechanisms that control environmental change. In addition, the project will produce methodological improvements in sediment-dating techniques, produce virtual tours for the Flyover Country mobile phone app and develop educational materials for national park and community groups. The project also will use project datasets in hands-on STEM training for undergraduate and graduate students and high school teachers. Well-dated lake sediment cores provide one of the few terrestrial archives available to extend the record of climate change in the American West into the early Holocene and terminal Pleistocene. Interpretation of geochemical, sedimentological, and paleobiological proxy records from Mono Lake cores will provide continuous records of lake level and productivity that are tied to absolute lake levels available from paleo-shorelines. A sub-centennial-precision age model for the records will allow accurate and precise correlation of terrestrial climate conditions in the West to global records for the first time. This will shed light on the mechanisms controlling Western climate between the waning of the great continental ice sheets and the droughts and pluvials of the last 2000 years, which have been examined in detail in tree-ring records.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.

随着干旱，洪水和野火的频率，强度和破坏的增加，必须将新的重点放在理解美国西部气候系统的情况下。 该项目将研究加利福尼亚州最重要的水源的单盆地的沉积物。 Mono Lake位于内华达州东部的内华达州，对该地区降水量的变化高度敏感。该项目将开发良好的湖泊数据，以与过去约16，000年的气候模型进行比较，以研究控制环境变化的机制。 此外，该项目将在沉积物约会技术上产生方法论上的改进，为天桥国家手机应用程序提供虚拟旅行，并为国家公园和社区团体开发教育材料。该项目还将在本科生和研究生和高中老师的动手STEM培训中使用项目数据集。良好的湖泊沉积物核心提供了为数不多的陆地档案之一，可将美国西部气候变化的记录扩展到全新世早期和终末更新世。对单湖岩心的地球化学，沉积学和古生物学替代记录的解释将提供湖泊水平和生产力的连续记录，这些记录与古 - 清除物可获得的绝对湖泊水平相关。用于记录的次年期限年龄模型将使西方的陆地气候条件与全球记录的准确和精确相关。这将阐明控制西方气候的机制，在大陆冰盖的衰落与过去2000年的干旱和挑战之间，这些机制已在树环记录中进行了详细检查。这奖反映了NSF的法定任务，并已有。使用基金会的知识分子优点和更广泛的审查标准，被认为值得通过评估来支持。