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.

来自有机物质的土壤碳构成了全球碳循环的重要组成部分，是一种日益引起管理兴趣的资源。在非农业环境中，如美国西部占主导地位的丘陵和山区，缺乏显示土壤有机碳如何分布和野火后变化的准确数据。该项目将收集俄勒冈州西南部最近被烧毁的山区研究地点的土壤有机碳的范围、深度和年龄的数据，并将研究影响这些景观中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，包括在土壤中封存碳以应对气候变化的努力。该项目团队还将积极参与俄勒冈大学的体验式学习计划，该计划旨在帮助历史上代表性不足的群体的学生追求科学、技术、工程和数学（STEM）方面的兴趣，并将支持对一名女研究生的培训。该项目将量化地形、土壤性质和土壤有机碳之间的功能关系，这可以应用于世界各地的一系列侵蚀、土壤覆盖的景观。该项目将结合土壤生产和运输的地貌学理论、机载激光雷达生成的高分辨率地形以及实地获得的生态和生物地球化学数据，追踪山坡上土壤有机碳库的变化，这些变化跨越了一系列侵蚀速率和形态特征。此外，利用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量和持久性，通过碳储量量化与辐射测年相结合进行评估，从而确定过去和未来野火的遗产。该项目的综合框架可以进行校准，并应用于不同的生态区域，以一种允许快速和准确升级的方式绘制土壤碳图。该项目将促进关键带科学在全球环境变化下改善碳循环预测的潜力。提高对土壤有机碳的认识将有助于在土地管理和全球气候模型开发中的实际应用。此外，该项目将帮助俄勒冈大学推进三项倡议，以扩大STEM的参与，并将支持对一名女研究生的培训。该奖项反映了美国国家科学基金会的法定使命，并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，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.