Doctoral Dissertation Research: Temperature reconstructions for the United States Intermountain West

博士论文研究：美国西部山间地区的温度重建

• 批准号: 2012482
• 负责人: Grant Harley
• 金额: $ 1.77万
• 依托单位: Regents of the University of Idaho
• 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 2022-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012482&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; Temperature; reconstructions

This study will reconstruct summer air temperatures over the past 1000 years using tree-ring data in an area where these data do not currently exit. Using a novel “blue-light” proxy for tree-ring analysis, this project will provide solid contributions to the field of dendrochronology. Understanding the broader temporal and spatial patterns, timing, and amplitude of current and past cool and warm periods provides a framework to better understand future environmental disruptions in the study region. These data and the environmental reconstructions produced by this research will be hosted at the International Tree-Ring Data Bank and NOAA World Data Center for Paleoclimatology so that they are readily accessible to the public, as well as other researchers. As a Doctoral Dissertation Research Improvement award, this project will provide support to enable a graduate student to establish an independent research career.Current and future changes in temperatures may have negative impacts on natural and human systems and high-resolution temperature reconstructions are needed to understand current and longer-term environmental change. The spatial variability of historic temperature trends is not fully understood, and this lack of knowledge limits model forecasts. This research will improve understandings of the historic spatial and temporal variability of summer temperatures across the western United States. It uses novel methods applied to tree rings to develop temperature records that provide information on (1) past and current spatiotemporal characteristics of temperature variability, (2) the full range and amplitude of historic temperatures, and (3) the timing and direction of temperature rate changes. Results from this work will contribute to increasing the global density of robust, longer-term, annually-resolved environmental records and increase the understanding of regional variability of past and present environmental trends.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.

这项研究将使用树木年轮数据重建过去1000年的夏季气温，该地区目前没有这些数据。 利用一种新的“蓝光”替代物进行树木年轮分析，这一项目将为树木年轮学领域做出坚实的贡献。了解更广泛的时间和空间模式，时间和幅度的当前和过去的冷暖期提供了一个框架，以更好地了解未来的环境破坏在研究区域。这些数据和这项研究产生的环境重建将托管在国际树轮数据库和NOAA世界古气候数据中心，以便公众和其他研究人员随时可以访问。作为博士论文研究改进奖，该项目将提供支持，使研究生能够建立一个独立的研究生涯。当前和未来的温度变化可能会对自然和人类系统产生负面影响，需要高分辨率的温度重建来了解当前和长期的环境变化。历史温度趋势的空间变异性尚未得到充分理解，这种知识的缺乏限制了模型的预测。这项研究将提高对美国西部夏季气温历史时空变化的理解。它使用适用于树木年轮的新方法来开发温度记录，提供以下信息：（1）过去和当前温度变化的时空特征，（2）历史温度的全部范围和幅度，以及（3）温度变化率的时间和方向。这项工作的结果将有助于增加全球可靠的、长期的、每年解决的环境记录的密度，并增加对过去和现在环境趋势的区域变化的理解。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

Unprecedented 21st century heat across the Pacific Northwest of North America

• DOI: 10.1038/s41612-023-00340-3
• 发表时间: 2023-02
• 期刊: npj Climate and Atmospheric Science
• 影响因子: 9
• 作者: K. J. Heeter;G. Harley;J. Abatzoglou;K. Anchukaitis;E. Cook;Bethany L Coulthard;Laura A. Dye;Inga K. Homfeld

Climate and ecological disturbance analysis of Engelmann spruce and Douglas fir in the greater Yellowstone ecosystem

• DOI: 10.1016/j.tfp.2020.100053
• 发表时间: 2021-03
• 作者: Brittany N. Rinaldi;R. S. Maxwell;T. Callahan;R. Brice;K. J. Heeter;G. Harley

Video tutorial: Measuring blue intensity with the CooRecorder software application

视频教程：使用 CooRecorder 软件应用程序测量蓝色强度

• DOI: 10.1016/j.dendro.2022.125999
• 发表时间: 2022
• 期刊: Dendrochronologia
• 影响因子: 3
• 作者: Heeter, Karen J.;King, Daniel J.;Harley, Grant L.;Kaczka, Ryszard J.
• 通讯作者: Kaczka, Ryszard J.

Climate-induced treeline mortality during the termination of the Little Ice Age in the Greater Yellowstone Ecoregion, USA

• DOI: 10.1177/09596836211011656
• 发表时间: 2021-04
• 期刊: The Holocene
• 作者: Maegen L. Rochner;K. J. Heeter;G. Harley;M. Bekker;S. Horn

Summer temperature variability since 1730 CE across the low-to-mid latitudes of western North America from a tree ring blue intensity network

• DOI: 10.1016/j.quascirev.2021.107064
• 发表时间: 2021-09
• 期刊: Quaternary Science Reviews
• 影响因子: 4
• 作者: K. J. Heeter;G. Harley;Justin T. Maxwell;R. Wilson;J. Abatzoglou;Shelly A Rayback;Maegen L. Rochner;Katherine A. Kitchens