EAR-Climate: Geomorphic controls on soil organic carbon in fire-prone erosional landscapes

EAR-气候：易发生火灾的侵蚀景观中土壤有机碳的地貌控制

• 批准号: 2136934
• 负责人: Joshua Roering
• 金额: $ 39.28万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2136934&HistoricalAwards=false
• 关键词: EAR; Climate; Geomorphic; controls; soil

Soil carbon from organic material constitutes a substantial component of the global carbon cycle and is a resource of increasing management interest. In non-agricultural settings, such as hilly and mountainous terrain that dominates the western United States, accurate data showing how soil organic carbon is distributed and changes following wildfire is lacking. This project will collect data on the extent, depth, and age of soil organic carbon at recently-burned mountainous study sites in southwest Oregon, and it will examine the factors that affect soil organic carbon changes in such landscapes. This research will help to inform soil management schemes, including efforts to sequester carbon in soils to combat climate change. The project team will also actively contribute to experiential learning initiatives at the University of Oregon, which seek to empower students from historically underrepresented groups toward pursuing interests in science, technology, engineering, and mathematics (STEM), and it will support training for a female graduate student.This project will quantify the functional relationships between topography, soil properties, and soil organic carbon, which can be applied to an array of eroding, soil-mantled landscapes across the world. Through the coupling of geomorphic theory for soil production and transport, high-resolution topography generated from airborne lidar, and field-derived ecological and biogeochemical data, this project will track changes in soil organic carbon pools on hillslopes that span a range of erosion rates and morphologic characteristics. In addition, using data from study sites in southwest Oregon, this project will determine how disturbance and forest succession affect soil organic carbon amounts and permanence, assessed through the quantification of carbon stocks combined with radiometric dating, and thus determine the legacy of past and future wildfires. The project's integrative framework can be calibrated and applied in different ecoregions to map soil carbon in a fashion that allows for rapid and accurate upscaling. This project will advance the potential of critical zone science to improve carbon cycling predictions under global environmental change. Improved understanding of soil organic carbon will contribute to practical applications in land management and global climate model development. In addition, the project will help to advance three initiatives at the University of Oregon toward broadening participation in STEM, and it will support training for a female graduate student.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.

来自有机材料的土壤碳构成了全球碳循环的重要组成部分，并且是日益引起管理兴趣的资源。在非农业环境中，例如美国西部的丘陵和山区，缺乏显示土壤有机碳在野火后如何分布和变化的准确数据。该项目将收集俄勒冈州西南部最近燃烧的山区研究地点土壤有机碳的范围、深度和年龄的数据，并将研究影响此类景观土壤有机碳变化的因素。这项研究将有助于为土壤管理计划提供信息，包括在土壤中固碳以应对气候变化的努力。该项目团队还将积极为俄勒冈大学的体验式学习计划做出贡献，该计划旨在帮助历史上代表性不足的群体的学生追求对科学、技术、工程和数学 (STEM) 的兴趣，并将支持对女研究生的培训。该项目将量化地形、土壤特性和土壤有机碳之间的函数关系，可应用于一系列侵蚀、覆盖土壤的区域。 世界各地的风景。通过将土壤生产和运输的地貌理论、机载激光雷达生成的高分辨率地形以及现场获得的生态和生物地球化学数据相结合，该项目将跟踪山坡上跨越一系列侵蚀率和形态特征的土壤有机碳库的变化。此外，利用来自俄勒冈州西南部研究地点的数据，该项目将确定干扰和森林演替如何影响土壤有机碳含量和持久性，通过碳储量量化和放射性测年相结合进行评估，从而确定过去和未来野火的遗留问题。该项目的综合框架可以校准并应用于不同的生态区，以能够快速准确升级的方式绘制土壤碳图。该项目将提升关键区域科学的潜力，以改善全球环境变化下的碳循环预测。提高对土壤有机碳的了解将有助于土地管理和全球气候模型开发的实际应用。此外，该项目将有助于推进俄勒冈大学的三项举措，以扩大对 STEM 的参与，并将支持对女研究生的培训。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值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

Pedogenic pathways and deep weathering controls on soil organic carbon in Pacific Northwest forest soils

• DOI: 10.1016/j.geoderma.2023.116531
• 发表时间: 2023-08
• 期刊: Geoderma
• 影响因子: 6.1
• 作者: Brooke D. Hunter;J. Roering;P. Almond;O. Chadwick;M. Polizzotto;Lucas C. R. Silva

Quantifying erosion rates and weathering pathways that maximize soil organic carbon storage

量化侵蚀率和风化途径，最大限度地提高土壤有机碳储存量

• DOI: 10.1007/s10533-023-01054-7
• 发表时间: 2023
• 期刊: Biogeochemistry
• 影响因子: 4
• 作者: Roering, Joshua J.;Hunter, Brooke D.;Ferrier, Ken L.;Chadwick, Oliver A.;Yoo, Kyungsoo;Wackett, Adrian A.;Almond, Peter C.;Silva, Lucas;Jellinek, A. Mark
• 通讯作者: Jellinek, A. Mark

Geomorphic controls on the abundance and persistence of soil organic carbon pools in erosional landscapes

侵蚀景观中土壤有机碳库丰度和持久性的地貌控制

• DOI: 10.1038/s41561-023-01365-2
• 发表时间: 2024
• 期刊: Nature Geoscience
• 影响因子: 18.3
• 作者: Hunter, Brooke D.;Roering, Joshua J.;Silva, Lucas C.;Moreland, Kimber C.
• 通讯作者: Moreland, Kimber C.