Stream Corridor Hydrologic Controls on Carbon Dioxide Fluxes

河流廊道水文对二氧化碳通量的控制

基本信息

批准号：
2103520
负责人：
Matthew Winnick
金额：
$ 36.85万
依托单位：
University of Massachusetts Amherst
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-07-01 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2103520&HistoricalAwards=false
关键词：
Stream Corridor Hydrologic Controls Carbon

项目摘要

Rivers and streams are increasingly recognized as important sources of greenhouse gases such as carbon dioxide (CO2) to the atmosphere; however, the full magnitude of emissions and the processes that control them remain highly uncertain. This project will combine innovative field characterizations of stream hydrology and carbon processing with advanced computer models to improve our ability to predict and scale stream CO2 fluxes. Results of this research will advance our understanding of an important component of the global carbon cycle and the ability to monitor changes into the future, and generated computer models will be made publicly available. This research will also comprise the training of a PhD student and undergraduate researcher, and it will serve as the focus of a 1-day educational module for a diverse group of high school students through the Rocky Mountain Biological Laboratory’s summer Field Biology course.The primary objective of this project is to develop quantitative models of stream corridor hydrologic processes, their controls on watershed-level stream CO2 fluxes, and their spatial and temporal modes of variability. Through intensive field monitoring of the upper East River watershed in the Colorado Rocky Mountains, the project will address a number of research goals: (1) Provide direct observations of groundwater inputs to streams using high resolution temperature mapping and geochemical characterization to understand their contributions to CO2 fluxes and role in driving spatiotemporal variability through connectivity and flowpath variations; (2) Disentangle in-stream CO2 production between water-column and hyporheic zone sources and characterize the dominant processes that control CO2 exchange with the hyporheic zone through a series of reach-scale monitoring efforts and tracer release experiments; (3) Incorporate process-based representations of groundwater inputs and stream corridor production, along with transport and turbulent gas exchange, into reach- and watershed-scale stream network models of CO2 to improve predictions and monitoring of stream concentrations and fluxes.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.

河流和溪流越来越被认为是大气中的温室气体（例如二氧化碳（CO2））的重要来源。但是，全部排放量和控制它们的过程仍然高度不确定。该项目将将流水文和碳处理的创新现场字符与先进的计算机模型相结合，以提高我们预测和扩展流二氧化碳通量的能力。这项研究的结果将提高我们对全球碳周期重要组成部分的理解，并能够监视对未来的变化的能力，并将公开使用生成的计算机模型。 This research will also comprise the training of a PhD student and undergraduate researcher, and it will serve as the focus of a 1-day educational module for a divers group of high school students through the Rocky Mountain Biological Laboratory’s summer Field Biology course.The primary objective of This project is to develop quantitative models of stream corridor hydrologic processes, their controls on watershed-level stream CO2 fluxes, and their spatial and temporary modes of variability.通过对科罗拉多洛矶山脉的上东河流域进行密集的现场监控，该项目将解决许多研究目标：（1）直接使用高分辨率的温度映射和地球化学表征来直接观察到地下水输入，以了解其对CO2磁通的贡献，并在驱动空间时间变化中通过连接和流动性变量来驱动空间变化; （2）在水柱和高潮区域之间解开河流二氧化碳的产生，并通过一系列接触量表的监测工作和示踪剂释放实验来表征与高压区域控制二氧化碳交换的主要过程； (3) Incorporate process-based representations of groundwater Inputs and stream corridor production, along with transport and turbulent gas exchange, into reach- and watershed-scale stream network models of CO2 to improve predictions and monitoring of stream concentrations and fluxes.This award reflects NSF's statutory mission and has been deemed precious of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.