Collaborative Research: RUI: Glacier resilience during the Holocene and late Pleistocene in northern California

合作研究：RUI：北加州全新世和晚更新世期间的冰川恢复力

• 批准号: 2303408
• 负责人: Laura Levy
• 金额: $ 40.92万
• 依托单位: Humboldt State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2026-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2303408&HistoricalAwards=false
• 关键词: Collaborative; Research; RUI; Glacier; resilience

Glaciers are important water resources for downstream communities and are sensitive recorders of climate change. The reconstructed position of glaciers through the last ice age has been used to infer past climate changes in the western U.S. However, previous research has focused along the continental interior (e.g., the Rocky Mountains) or the Sierra Nevada. This project investigates climate changes over the past 20,000 years in the Trinity Alps region of the Klamath Mountains, northern California by reconstructing past glacier changes. The study provides the first quantitative data on glaciation from the Pacific-proximal Klamath Mountains, a location that may be out-of-phase climatically with interior continental ranges. The research is producing new reconstructions of past climate for northern California and fills a spatial gap in the glacial history along the western United States. The project highlights the impact of climate change on glaciers in northern California, with societal impacts for water resources in California and globally. Additional project goals include acting as a catalyst to inspire and recruit geoscience undergraduate majors and develop pathways for careers as geological and environmental scientists. All project institutions are Minority-Serving or Hispanic-Serving Institutions; the project provides 32 students an opportunity for a one-week field trip focusing on the Central Valley Water Project and water resources in California. By bringing together diverse students from the northernmost and southernmost parts of the state, the aim of this field trip is to stimulate the students’ interest in geoscience, expand their perspectives, and foster collaboration within these future leaders. Additionally, thirteen undergraduate and three graduate students are supported to conduct research and present their findings at conferences. This project uses a multi-disciplinary approach to identify past climate changes in the Trinity Alps of northern California and to evaluate the mechanisms for these changes by integrating geomorphic mapping, 10Be surface exposure dating, lake sediment coring, dendrochronology/dendroclimatology and numerical modeling of glaciers and climate changes. Until their recent demise, glaciers in the Trinity Alps were some of the lowest-elevation glaciers in the continental United States. These glaciers are closer to the moisture source of the Pacific Ocean than the better-studied glaciers in the Rocky Mountains and Sierra Nevada. Thus, glaciers in the Trinity Alps may have responded differently to climate changes over the past 20,000 years than the drier regions in the continental United States. The mechanisms for these past climate changes are being evaluated by comparing the climate reconstructions from this project to output from paleoclimate global climate models from PMIP4/CMIP6 and previously published paleoclimate records. By using methods from multiple disciplines, this project provides a new glacial and climate history for northern California and evaluates of the mechanisms associated with these changes.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.

冰川是下游社区的重要水资源，是气候变化的敏感记录。冰川在最后一个冰河时代的重建位置已被用来推断美国西部的过去气候变化，但是先前的研究集中在连续的内部（例如落基山脉）或内华达山脉。该项目通过重建过去的冰川变化，调查了过去20,000年的气候变化。这项研究提供了有关太平洋 - 高峰山山脉冰川的第一个定量数据，该位置可能具有内部连续范围的情况。这项研究正在为北加州产生新的过去气候重建，并填补了美国西部冰川历史上的空间空白。该项目凸显了气候变化对北加州辉煌的影响的影响，对加利福尼亚和全球水资源产生了社会影响。其他项目目标包括充当激发和招募地球科学本科专业的催化剂，并开发作为地质和环境科学家的职业途径。所有项目机构都是少数派服务或西班牙裔服务机构；该项目为32名学生提供了一次为期一周的实地考察，重点是加利福尼亚的中央谷水项目和水资源。通过从该州最北部和最南端的地区汇集不同的学生，这次实地考察的目的是激发学生对地球科学的兴趣，扩大他们的观点，并在这些未来的领导者中促进合作。此外，还支持13名本科生和三名研究生进行研究并在会议上介绍他们的发现。该项目使用多学科的方法来确定北加州三位一体阿尔卑斯山的过去气候变化，并通过整合地面映射，10BE表面暴露日期，湖泊沉积物，树突状态/树突状态学和冰川和气候变化的数字模型来评估这些变化的机制。直到他们最近的灭亡，三位一体阿尔卑斯山中的冰川是美国连续塔尔河中最低的冰川。这些冰川比落基山和内华达山脉的冰川更接近太平洋的水分来源。这是，三位一体阿尔卑斯山的冰川在过去20，000年中对气候变化的反应可能与连续美国的驾驶员地区不同。通过比较该项目的气候重建与PMIP4/CMIP6的古气候全球气候模型的输出以及先前发表的古气候记录的产量，可以评估过去气候变化的机制。通过使用来自多个学科的方法，该项目为北加州提供了新的冰川和气候历史，并评估了与这些变化相关的机制。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛影响标准的智力优点评估来获得的支持。