Collaborative Research: P2C2: Extending Key Records of Holocene Climate Change and Glacier Fluctuations in the North Pacific Region Using Subfossil Wood from Southeastern Alaska

合作研究：P2C2：利用阿拉斯加东南部的亚化石木材扩展北太平洋地区全新世气候变化和冰川波动的关键记录

基本信息

批准号：
2002561
负责人：
Benjamin Gaglioti
金额：
$ 32.8万
依托单位：
University of Alaska Fairbanks Campus
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：
2020-06-01 至 2024-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002561&HistoricalAwards=false
关键词：
Collaborative Research P2C2 Extending Key

项目摘要

This project aims to develop a multi-millennial, tree-ring chronology from subfossil trees exposed by retreating glaciers in Southeast Alaska to precisely calendar-date Holocene glacier fluctuations and compare them with a new record of climate seasonality. The multi-millennial tree-ring chronology will be used to extend reconstructions of spring and summer temperatures and build new records of winter storminess by analyzing traumatic resin ducts in annual tree rings. The winter storminess reconstruction is related to the strength of the Aleutian Low-pressure system (AL) and its analysis has the potential to transform the understanding of cold season ocean-atmospheric variability in the North Pacific. Specific goals of this project are to: 1) Generate 2,000-year-long records of wintertime AL along with summer temperature variability to determine how they responded to past climate forcing. 2) Use dendrochronology to precisely date when seven land-terminating and two tidewater glaciers advanced and retreated during the last 4000. 3) Test the hypothesis that the most extensive Holocene glacier advances in south coastal Alaska occurred when cooler summer air temperatures (reduced melt) coincided with a strengthened AL (increased snowfall). The potential Broader Impacts include the collection of time-sensitive archives of buried wood that would be available to the scientific communities for multi-disciplinary investigations. The project will generate new reconstructions of spring-summer temperature, winter storminess and glacier advance/retreats to better understand the dynamics of climate-glacier mass balance and the North Pacific decadal variability at millennial time scales. This project will provide training for four undergraduate students as part of their undergraduate thesis including field work, data analysis and presentation of the results. The researchers will engage in public outreach by giving two talks at Glacier Bay National Park. In addition, a dendrochronology workshop in partnership with the Hoonah Indian Association and the Hoonah Native Forest Partnership will be organized in the Native Alaskan Village of Hoonah with the goal of engaging students in skill-based technique centered on the collection and analysis of 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.

该项目旨在开发一个多千禧一代的树环时间类，从通过将阿拉斯加东南部冰川撤退到精确日历日期全新世冰川波动而暴露的亚物质树，并将它们与气候季节的新记录进行比较。多千年树环的年表将用于扩展春季和夏季温度的重建，并通过分析年度树环中的创伤性树脂导管来建立冬季风暴的新记录。冬季风暴重建与阿留申式低压系统（AL）的强度有关，其分析有可能改变北太平洋对寒冷季节海洋 - 大气变异性的理解。该项目的具体目标是：1）产生2,000年的冬季AL记录以及夏季温度的可变性，以确定它们如何应对过去的气候强迫。 2）使用Dendrochology以确切的日期使用DENDROSTOLOGY，当时七个土地终止和两个潮汐水冰川在最后4000期中升级并撤退。3）测试以下假设：南部阿拉斯加南岸最广泛的全新世冰川进步发生时，当凉爽的夏季空气温度（减少）与增强的AL（增强雪地）相吻合时，就会发生。潜在的更广泛的影响包括收集埋藏木材的时间敏感档案，这些档案将为科学社区提供多学科调查。该项目将产生新的春季夏季温度，冬季风暴和冰川疗程的重建，以更好地了解气候 - 冰川质量平衡的动态和千年时间尺度上北太平洋衰老变异性的动态。作为其本科论文的一部分，该项目将为四名本科生提供培训，包括现场工作，数据分析和结果的介绍。研究人员将通过在冰川湾国家公园进行两次演讲，从事公共宣传。此外，将在阿拉斯加原住民霍oah村与霍oah印度协会和霍oah本地森林伙伴关系合作举办一项Dendrosology研讨会，目的是让学生参与基于技能的技术，以收集和分析为基于树木的纪录，这反映了NSF的法定任务和范围的范围，该奖项通过评估范围及其范围进行了评估。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

A Spatiotemporal Assessment of Extreme Cold in Northwestern North America Following the Unidentified 1809 CE Volcanic Eruption

DOI：
10.1029/2022pa004581
发表时间：
2023-04
期刊：
Paleoceanography and Paleoclimatology
影响因子：
3.5
作者：
C. Leland;R. D’Arrigo;N. Davi;K. J. Anchukaitis;L. Andreu‐Hayles;T. Porter;T. Galloway;M. Mant;G. Wiles;R. Wilson;S. Beaulieu;R. Oelkers;B. Gaglioti;M. Rao;E. Reid;T. Nixon
通讯作者：
C. Leland;R. D’Arrigo;N. Davi;K. J. Anchukaitis;L. Andreu‐Hayles;T. Porter;T. Galloway;M. Mant;G. Wiles;R. Wilson;S. Beaulieu;R. Oelkers;B. Gaglioti;M. Rao;E. Reid;T. Nixon

How does the proximity of mountain glaciers affect the microclimates of adjacent forests in Southeast Alaska?

山地冰川的接近如何影响阿拉斯加东南部邻近森林的小气候？