Collaborative Proposal: Determining the Vulnerability and Resilience of Boreal Forests and Shrubs across Northwestern North America

合作提案：确定北美西北部北方森林和灌木的脆弱性和恢复力

• 批准号: 1603473
• 负责人: Rosanne D'Arrigo
• 金额: $ 37.2万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1603473&HistoricalAwards=false
• 关键词: Collaborative; Proposal; Determining; Vulnerability; Resilience

The importance of Boreal and Arctic landscapes is recognized by the scientific community as an important area of research. The overarching theory to be tested in this proposal is that the current controls over vegetation growth are not operating as they have been in the past. The investigators have at hand a detailed network of ground measurements of tree-ring data collected across a range of Boreal and Arctic forests and shrublands sites in Alaska and adjacent Canada. This data will be compared with satellite based remote sensing proxies of vegetation productivity. The work is by and large an analysis and comparison of two independent methods for assessing vegetation growth variability in Arctic ecosystems.This project will contribute to the education of the general public (e.g. annual open house exhibits, websites, blogs from the field), and will partially fund a post-doctoral researcher who will have the opportunity to expand their scientific experience and knowledge of this topic.This work will focus on Boreal and Arctic forests and shrublands across Alaska and adjacent Canada, regions that are experiencing some of the most rapid warming on the globe today. Satellite observations have revealed significant vegetation productivity trends (both greening and browning) of vegetation at high northern latitudes, with distinct differences between North America and northern Eurasia biomes and between tundra and boreal regions. At the same time, some observations show that the strong correlation between northern tree growth and temperature appears to be weakening in recent decades. The overarching theory to be tested in this proposal is that the current controls over vegetation growth are not operating as they have been in the past. The investigators have at hand a detailed network of in situ ground measurements of tree-ring data collected from across this region. This data will be compared with remote sensing proxies of vegetation productivity (from satellite NDVI), across a range of Boreal and Arctic forests and shrublands sites in Alaska and adjacent Canada. The work will include one year of field data in regions of high priority where the investigators will extract up to date tree ring cores for comparison with recent air temperature and remote sensing records.

北方和北极景观的重要性被科学界视为一个重要的研究领域。该提案要测试的总体理论是，目前对植被生长的控制措施并未像过去那样发挥作用。研究人员手头有一个详细的地面测量网络，对阿拉斯加和邻近加拿大的一系列北方和北极森林和灌木丛收集的树木年轮数据进行了地面测量。 该数据将与基于卫星的植被生产力遥感代理进行比较。这项工作大体上是对评估北极生态系统植被生长变异性的两种独立方法的分析和比较。该项目将有助于公众教育（例如，年度开放日展览、现场网站、博客），并将部分资助一名博士后研究员，他们将有机会扩展他们对此主题的科学经验和知识。这项工作将重点关注北方和北极森林和灌木丛 阿拉斯加和邻近的加拿大这些地区正在经历当今全球最快速的变暖。 卫星观测揭示了北部高纬度植被的显着植被生产力趋势（绿化和褐化），北美和欧亚大陆北部生物群落之间以及苔原和北方地区之间存在明显差异。与此同时，一些观察表明，近几十年来北方树木生长与温度之间的强相关性似乎正在减弱。 该提案要测试的总体理论是，目前对植被生长的控制措施并未像过去那样发挥作用。研究人员手头有一个详细的网络，对从该地区收集的树木年轮数据进行现场地面测量。 该数据将与阿拉斯加和邻近加拿大一系列北方和北极森林和灌木丛地区的植被生产力遥感代理（来自卫星 NDVI）进行比较。 这项工作将包括高优先级地区一年的现场数据，研究人员将提取最新的树木年轮核心，以便与最近的气温和遥感记录进行比较。

项目成果

Traumatic Resin Ducts in Alaska Mountain Hemlock Trees Provide a New Proxy for Winter Storminess

阿拉斯加山铁杉树上的创伤性树脂管为冬季暴风雨提供了新的替代物

• DOI: 10.1029/2018jg004849
• 发表时间: 2019
• 期刊: Journal of Geophysical Research: Biogeosciences
• 作者: Gaglioti, Benjamin V.;Mann, Daniel H.;Williams, A. Park;Wiles, Gregory C.;Stoffel, Markus;Oelkers, Rose;Jones, Benjamin M.;Andreu‐Hayles, Laia
• 通讯作者: Andreu‐Hayles, Laia

Tree-ring cellulose δ18O records similar large-scale climate influences as precipitation δ18O in the Northwest Territories of Canada

• DOI: 10.1007/s00382-021-05932-4
• 发表时间: 2021-10-24
• 期刊: CLIMATE DYNAMICS
• 影响因子: 4.6
• 作者: Field, Robert D.;Andreu-Hayles, Laia;Levesque, M.
• 通讯作者: Levesque, M.

A narrow window of summer temperatures associated with shrub growth in Arctic Alaska

• DOI: 10.1088/1748-9326/ab897f
• 发表时间: 2020-10-01
• 期刊: ENVIRONMENTAL RESEARCH LETTERS
• 影响因子: 6.7
• 作者: Andreu-Hayles, Laia;Gaglioti, Benjamin, V;D'Arrigo, Rosanne
• 通讯作者: D'Arrigo, Rosanne

A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes

• DOI: 10.1016/j.chemgeo.2018.09.007
• 发表时间: 2019-01-20
• 期刊: CHEMICAL GEOLOGY
• 影响因子: 3.9
• 作者: Andreu-Hayles, Laia;Levesque, Mathieu;Helle, Gerhard
• 通讯作者: Helle, Gerhard

Timing and Potential Causes of 19th-Century Glacier Advances in Coastal Alaska Based on Tree-Ring Dating and Historical Accounts

基于树木年轮测年和历史记载，阿拉斯加沿海 19 世纪冰川推进的时间和潜在原因

• DOI: 10.3389/feart.2019.00082
• 发表时间: 2019
• 期刊: Frontiers in Earth Science
• 影响因子: 2.9
• 作者: Gaglioti, Benjamin V.;Mann, Daniel H.;Wiles, Gregory C.;Jones, Benjamin M.;Charlton, Josh;Wiesenberg, Nicholas;Andreu-Hayles, Laia
• 通讯作者: Andreu-Hayles, Laia