Collaborative Research: P2C2--Where Has the water Gone? Results from a Watershed Model with Dendroclimatic Inputs

合作研究：P2C2——水去哪儿了？

• 批准号: 1903561
• 负责人: Franco Biondi
• 金额: $ 21.69万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903561&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; Where; water

This project aims to determine the past behavior of river discharge, evapotranspiration, and snow-water equivalent by applying a combination of multiple tree-ring variables and water balance modeling. This research is part of an effort to improve the understanding of runoff from about one-third of the 200 largest rivers which has changed significantly since the 1950s yet lacks context for much longer (century-scale) information on seasonal runoff variability for individual watersheds that could help constrain future climate model projections.Specifically, the researchers aim to determine the past behavior of river discharge, evapotranspiration, and snow-water equivalent by applying a combination of multiple tree-ring variables and water balance modeling. Seasonal inputs, i.e. precipitation and air temperature, will be derived from multi-proxy tree-ring chronologies (early- and late-wood width, blue intensity, and wood anatomy measurements) in the western U.S. The field study design will update tree-ring chronologies that are part of the ITRDB (International Tree-Ring Data Bank) and will combine classic sampling methods with modern standardization tools. Compared with statistics-only reconstructions, the use of a watershed model may provide a way to perform sensitivity studies that improve the estimation of uncertainty in the extended records, in particular with regard to landscape and vegetation factors influencing infiltration and runoff efficiency (ratio of runoff to precipitation). A proof-of-concept study is included in the project to clarify how our monthly water balance model can be calibrated and run using seasonal instrumental and proxy records of climate. Accuracy of discharge reconstructions by the water-balance approach will be compared with that of reconstructions by the conventional approach of regression of gaged discharge on tree-ring data. The study area is the combined Truckee/Carson River Basin (Nevada and California), which embodies many of the water resources issues currently confronting managers and planners in the western U.S. Drought characteristics of this basin will be examined to place recent droughts in a long-term context. Spatial aspects of drought variability related to large-scale climatological drivers will be evaluated by comparing the new reconstructions with existing ones for other western rivers. The project also includes development of an interactive online mapping tool for use by resource managers, planners, and the general public in exploring the history of local and regional hydroclimate.The potential Broader Impacts (B.I.) include data useful for improved management of water and forest resources in the Truckee/Carson Basin and by extension in the Sierra Nevada, a critical mountain range for freshwater resources in the western United States. The project will support two graduate students directly engaged in the project as well as several undergraduate students. The project will also develop an online mapping tool that K-12 students who participate in UA Tree-Ring Lab's outreach program would be able to use.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.

该项目旨在通过应用多种树轮变量和水量平衡模型的组合来确定河流流量、蒸散量和雪水当量的过去行为。这项研究是为了提高对200条最大河流中约三分之一的径流的理解，这些河流自20世纪50年代以来发生了显著变化，但缺乏关于单个流域季节性径流变化的更长时间(百年尺度)的信息，这些信息可能有助于限制未来的气候模型项目。具体地说，研究人员的目标是通过应用多个树轮变量和水平衡建模的组合来确定河流流量、蒸散量和雪水当量的过去行为。季节输入，即降水和气温，将来自美国西部的多指标年轮年表(早材和晚材宽度、蓝色强度和木材解剖测量)。实地研究设计将更新国际年轮数据库(ITRDB)中的年轮年表，并将经典抽样方法与现代标准化工具相结合。与单纯的统计重建相比，流域模型的使用可以提供一种方法来进行敏感性研究，改进对扩展记录中不确定性的估计，特别是关于影响入渗和径流效率(径流与降水比率)的景观和植被因素。该项目包括一项概念验证研究，以阐明如何使用气候的季节性仪器和替代记录来校准和运行我们的每月水量平衡模型。将水量平衡法重建流量的精度与传统的树木年轮流量回归方法重建流量的精度进行比较。研究区域是Truckee/Carson河流域(内华达州和加利福尼亚州)，它体现了美国西部管理者和规划者目前面临的许多水资源问题。将研究该流域的干旱特征，以便将最近的干旱放在长期背景下考虑。将通过将新的重建与其他西部河流的现有重建进行比较，来评估与大规模气候驱动因素有关的干旱可变性的空间方面。该项目还包括开发交互式在线地图工具，供资源管理者、规划者和公众使用，以探索当地和区域水文气候的历史。潜在的更广泛影响(B.I.)包括有助于改进Truckee/Carson盆地以及内华达山脉的水资源和森林资源管理的数据，内华达山脉是美国西部淡水资源的关键山脉。该项目将支持两名直接参与该项目的研究生以及几名本科生。该项目还将开发一个在线地图工具，供参加UA Tree-Ring Lab扩展计划的K-12学生使用。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Inter-specific transpiration differences between aspen, spruce, and pine in a sky-island ecosystem of the North American Great Basin

• DOI: 10.1016/j.foreco.2021.119157
• 发表时间: 2021-07
• 期刊: Forest Ecology and Management
• 影响因子: 3.7
• 作者: Xinsheng Liu;F. Biondi

From Dendrochronology to Allometry

• DOI: 10.3390/f11020146
• 发表时间: 2020-02-01
• 期刊: FORESTS
• 影响因子: 2.9
• 作者: Biondi, Franco

Dendroanatomy of xylem hydraulics in two pine species: Efficiency prevails on safety for basal area growth in drought-prone conditions

• DOI: 10.1016/j.dendro.2023.126116
• 发表时间: 2023-07-21
• 期刊: DENDROCHRONOLOGIA
• 影响因子: 3
• 作者: Ziaco，Emanuele;Liu，Xinsheng;Biondi，Franco
• 通讯作者: Biondi，Franco

Bell-shaped tree-ring responses to air temperature drive productivity trends in long-lived mountain Mediterranean pines

钟形树轮对气温的反应推动了长寿山区地中海松的生产力趋势

• DOI: 10.1016/j.scitotenv.2023.164103
• 发表时间: 2023
• 期刊: Science of The Total Environment
• 影响因子: 9.8
• 作者: Piovesan, Gianluca;Rita, Angelo;Biondi, Franco;Baliva, Michele;Borghetti, Marco;Brunetti, Michele;De Vivo, Giuseppe;Di Filippo, Alfredo;Dinella, Anna;Gentilesca, Tiziana
• 通讯作者: Gentilesca, Tiziana

Stomatal regulation and xylem hydraulics of limber pine and Engelmann spruce in Great Basin sky-island ecosystems

• DOI: 10.1016/j.scitotenv.2023.164351
• 发表时间: 2023-06-03
• 期刊: SCIENCE OF THE TOTAL ENVIRONMENT
• 影响因子: 9.8
• 作者: Liu，Xinsheng;Ziaco，Emanuele;Biondi，Franco
• 通讯作者: Biondi，Franco