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，并且是增加管理兴趣的资源。在非农业环境中，例如占主导地位的丘陵和山地地形，准确的数据显示了土壤有机碳的分布方式以及缺乏野火后的变化。该项目将在俄勒冈州西南部最近被燃烧的山区研究地点的土壤有机碳的程度，深度和年龄收集数据，它将检查影响这种景观中土壤有机碳变化的因素。这项研究将有助于告知土壤管理方案，包括努力隔离土壤中的碳以应对气候变化。项目团队还将积极为俄勒冈大学的体验学习计划做出贡献，该计划旨在使学生能够从历史上不足的团体中赋予对科学，技术，技术，工程和数学（STEM）的兴趣，它将支持对女性研究生的培训，这将量化这一范围的女性研究生，这些项目将量化地图，土壤有机物和土壤有机物的功能性，这是一个范围，这是一家人，这是一个跨越地图，土壤有机物，既可以享受，又可以使土壤和土壤有机物与土壤有机化，并且是一家人，这是一个范围，这是一个范围的土壤和土壤，并且是一家人的土壤和土壤，并且是一家人的土壤和土壤，并且是一位土壤，并且是一位土壤，并且是土壤有机的，并且可以量化。世界各地的风景。通过与土壤生产和运输的地貌理论的耦合，由机载激增产生的高分辨率地形以及现场衍生的生态和生物地球化学数据，该项目将跟踪山坡上土壤有机碳池的变化，这些山地池跨越了一系列侵蚀率和形态学特征。此外，使用来自俄勒冈州西南研究地点的数据，该项目将决定干扰和森林的继承如何影响土壤有机碳的数量和永久性，并通过定量碳储量与辐射测定的结合进行评估，从而确定过去和未来野火的遗产。该项目的集成框架可以在不同的生态区中进行校准和应用，以以一种方式绘制土壤碳，从而可以快速准确地进行扫描。该项目将促进关键区科学的潜力，以改善全球环境变化下的碳循环预测。对土壤有机碳的了解得以提高，将有助于土地管理和全球气候模型开发中的实际应用。此外，该项目将有助于促进俄勒冈大学的三项举措，以扩大对STEM的参与，并将支持对女性研究生的培训。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来评估的支持。

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.