EAGER: A novel approach to measure greenhouse gas emissions from coastal marine ecosystems

EAGER：测量沿海海洋生态系统温室气体排放的新方法

• 批准号: 2223204
• 负责人: Peter Berg
• 金额: $ 29.67万
• 依托单位: University of Virginia Main Campus
• 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: 2022-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2223204&HistoricalAwards=false
• 关键词: EAGER; novel; approach; measure; greenhouse

The PI requests EAGER funding to develop a better and more accurate approach for determining greenhouse gas exchange between shallow-water marine systems and the atmosphere. If successful, this would transform our ability to accurately measure air-water exchange of greenhouse gasses in shallow-water marine ecosystems. The results of this EAGER project would increase our understanding of how aquatic ecosystems can help mitigate the impacts of human generated greenhouse gas emissions. More accurate and process-based knowledge on this topic is needed to allow better predictions of climate change impacts that would be expected and to outline local and global mitigation initiatives.The accelerating warming of Earth has spurred an intense and global focus on greenhouse gas exchange between the atmosphere and aquatic systems, including coastal waters. As direct measurements of air-water exchange of greenhouse gasses, here defined as CO2, CH4, and N2O, are complex and challenging to perform, most estimates today are based on published general empirical relationships from which exchange coefficients are estimated and multiplied with site-specific concentration differences over the air-water interface. This EAGER research proposes to combine upside-down aquatic eddy covariance (AEC) measurements of O2 fluxes over the air-water interface with an array of the best of these new greenhouse gas sensors and, from the prior, to extract greenhouse gas-specific exchange coefficients in order to calculate air-water greenhouse gas fluxes. If the new approach works, it would be transformative and have two major outcomes: it will vastly improve estimates of greenhouse gas air-water exchange where it is applied; and it will lead to new lines of research on the complex controls of this greenhouse gas exchange. Both outcomes are urgently needed to fill important knowledge gaps on greenhouse gas exchange in aquatic environments.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.

PI要求急切的资金开发出一种更好，更准确的方法来确定浅水海洋系统与气氛之间的温室气体交换。如果成功，这将改变我们准确测量浅水海洋生态系统中温室气体交换的能力。这个急切的项目的结果将增加我们对水生生态系统如何帮助减轻人类生成的温室气体排放的影响的理解。需要对该主题进行更准确和基于过程的知识，以更好地预测预期的气候变化影响，并概述本地和全球缓解措施。地球的加快促进了对温室气体交流的强烈和全球关注大气和水生系统，包括沿海水域。由于在此定义为CO2，CH4和N2O的温室气体交换的直接测量是复杂且具有挑战性的，因此当今的大多数估计都基于已发表的一般经验关系，从中估算了交换系数，并将其与站点乘以 - 空气水界面上的特定浓度差异。这项急切的研究建议将颠倒的水生涡流协方差（AEC）测量在空气水接口上的O2通量和这些新的温室气体传感器中的最佳阵列，从先验到提取温室气体特异性交换系数以计算空气水温室气体通量。如果新方法有效，它将具有变革性，并具有两个主要的结果：它将大大改善其应用的温室气水交换的估计；这将导致有关这种温室气体交换的复杂控制的新研究。迫切需要这两种结果来填补水生环境中温室气体交换的重要知识空白。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的影响评估标准通过评估来支持的。

项目成果

Variation in seagrass meadow respiration measured by aquatic eddy covariance

通过水生涡度协方差测量海草草甸呼吸的变化

• DOI: 10.1002/lol2.10276
• 发表时间: 2022
• 期刊: Limnology and Oceanography Letters
• 影响因子: 7.8
• 作者: Juska, Ieva;Berg, Peter
• 通讯作者: Berg, Peter