EAGER: Thermokarst lake carbon gas emission estimates and scaling

EAGER：热岩溶湖碳气体排放估算和缩放

• 批准号: 1823717
• 负责人: Andrew Parsekian
• 金额: $ 21.86万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1823717&HistoricalAwards=false
• 关键词: EAGER; Thermokarst; lake; carbon; gas

Thermokarst lakes that form when permafrost thaws and subsides are common features in Arctic regions. Recently, these lakes have been identified as providing a key pathway for methane release to the atmosphere. However, quantifying these fluxes has remained elusive. The purpose of this project is to connect direct observations of lake methane gas emissions, local geophysical mapping of these emissions, and regional-scale satellite-based observations, to improve the quantification and scaling of methane gas release from Arctic thaw lakes.Rapid and non-invasive ground-based geophysical measurements will be taken to describe thermokarst lake methane emissions, develop relationships between lake expansion and methane emissions, and then use Synthetic Aperture Radar imagery to scale the results to large regions. The synergy of direct, geophysical, and remote sensing measurements will provide linked, multi- scale observations not previously available. The outcomes of this work have implications for understanding global carbon budgets, Arctic engineering, and the development of environmental monitoring methods. Furthermore, this research will provide additional validation to the Ground Penetrating Radar and Synthetic Aperture Radar methods, benefit their respective development fields, and encourage more widespread application of these methods across the Arctic. This project includes outreach efforts to local communities that will result in summaries of the scientific results for general dissemination. Graduate and undergraduate students will be mentored throughout the research.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.

当永久冻土融化和沉降时形成的热岩溶湖是北极地区的常见特征。最近，这些湖泊已被确定为甲烷释放到大气中的关键途径。然而，量化这些通量仍然难以捉摸。该项目的目的是将湖泊甲烷气体排放的直接观测、这些排放的当地地球物理测绘和区域尺度的卫星观测相结合，以改进北极解冻湖泊甲烷气体排放的量化和缩放。将采取快速和非侵入性的地面地球物理测量来描述热岩溶湖泊甲烷排放，建立湖泊扩张与甲烷排放之间的关系，然后使用合成孔径雷达图像将结果缩放到大区域。直接测量、地球物理测量和遥感测量的协同作用将提供以前没有的多尺度观测。这项工作的结果对了解全球碳预算、北极工程和环境监测方法的开发具有影响。此外，这项研究将为探地雷达和合成孔径雷达方法提供额外的验证，有利于其各自的发展领域，并鼓励这些方法在北极地区更广泛的应用。该项目包括对当地社区的外联工作，这将导致科学成果的摘要，供普遍传播。该奖项反映了NSF的法定使命，并被认为值得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来支持。

项目成果

Permafrost thaw lake methane flux estimates using GPR

使用探地雷达估算永久冻土融化湖甲烷通量

• DOI: 10.1190/gpr2020-024.1
• 发表时间: 2020
• 期刊: 18th International Conference on Ground Penetrating Radar
• 作者: Rangel, R.;Parsekian, A.D.;Engram, M.J.;Ohara, N.;Jones, B.M.;Anthony, K.M.W.
• 通讯作者: Anthony, K.M.W.