CAREER: Integrating river hydrology across scales: advancing understanding of the global river-atmosphere interface

职业：跨尺度整合河流水文学：增进对全球河流-大气界面的理解

• 批准号: 2243001
• 负责人: George Allen
• 金额: $ 53.52万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-15 至 2027-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2243001&HistoricalAwards=false
• 关键词: CAREER; Integrating; river; hydrology; across

Rivers are natural hotspots for greenhouse gas emissions and are included in global carbon budget evaluations. However, the amount of greenhouse gas emitted by rivers is highly uncertain largely due to a fundamental gap in the current understanding of hydraulic scaling between small streams and large rivers. This project will develop a predictive understanding of how geomorphic and hydrologic processes combine to drive river-atmosphere interface dynamics across spatial and temporal scales. It will test underlying assumptions involved in estimating the global surface area of Earth’s rivers and streams and it will be used to more accurately estimate the global rates of greenhouse gas emissions from inland waters. The integrated research and teaching program will promote hydrologic and environmental literacy and awareness through public outreach and education, and it will help recruit and retain underrepresented minority students with the goal of increasing participation and diversity in STEM. This research will quantify the full size-distribution of river surface area within a continental-scale river basin by combining satellite, airborne, and fieldwork observations. Using these observations, this work will assess the interactions between river surfaces and streamflow at different time and spatial scales and develop a novel open-source model for predicting the river-atmosphere interface dynamics based on hydrologic drivers. The knowledge generated from this project will help fill in the conceptual gaps in our understanding of the river-atmosphere interface and develop the next generation of global river surface area products used in carbon budgets. This research will also untangle the hydrologic and geomorphic drivers of changing river morphology, advancing our understanding of how humans are impacting river systems and aquatic ecosystems. This award is co-funded by the Hydrologic Sciences and Geomorphology & Land-use Dynamics programs.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.

河流是温室气体排放的天然热点，包括全球碳预算评估。但是，河流发出的温室气数量高度不确定，这在很大程度上是由于当前对小流和大河之间氢化缩放的理解的基本差距。该项目将对地貌和水文过程如何驱动跨空间和时间尺度的河流 - 大气界面动力学的结合形成预测的理解。它将测试估计地球河流和溪流的全球表面积涉及的基本假设，并将用于更准确地估算内陆水域的全球温室气体排放率。综合研究与教学计划将通过公共宣传和教育来促进氢化学和环境素养以及意识，这将有助于招募和保留人数不足的少数族裔学生，目的是增加STEM的参与和多样性。这项研究将通过结合卫星，机载和现场工作观测来量化连续规模盆地内河流表面积的全尺寸分布。使用这些观察结果，这项工作将在不同时间和空间尺度上评估河流表面与流量之间的相互作用，并开发出一种新型的开源模型，以预测基于水文驱动因素的河流 - 大气界面动力学。该项目产生的知识将有助于填补我们对河流界面界面的理解，并开发碳预算中使用的下一代全球河流表面积产品。这项研究还将解开不断变化的河流形态的水文和地貌驱动因素，从而促进我们对人类如何影响河流系统和水生生态系统的理解。该奖项由水文科学和地貌学和土地利用动态计划共同资助。该奖项反映了NSF的法定使命，并使用基金会的知识分子优点和更广泛的影响审查标准，通过评估来诚实地表示支持。

项目成果

Inland Water Greenhouse Gas Budgets for RECCAP2: 2. Regionalization and Homogenization of Estimates

• DOI: 10.1029/2022gb007658
• 发表时间: 2023-04
• 期刊: Global Biogeochemical Cycles
• 影响因子: 5.2
• 作者: R. Lauerwald;G. Allen;B. Deemer;Shaoda Liu;T. Maavara;P. Raymond;L. Alcott;D. Bastviken;A. Has