CAS-Climate: Acquisition of an Ultraportable Field CO2 Isotope Analyzer and a Soil Gas Flux Chamber to Investigate CO2 Efflux and Stable Carbon Isotopes in Carbon Cycling Research

CAS-Climate：购买超便携式野外 CO2 同位素分析仪和土壤气体通量室，以研究碳循环研究中的 CO2 流出和稳定碳同位素

• 批准号: 2131105
• 负责人: Angelia Seyfferth
• 金额: $ 9.63万
• 依托单位: University of Delaware
• 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: 2022-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2131105&HistoricalAwards=false
• 关键词: CAS; Climate; Acquisition; Ultraportable; Field

Understanding how ecosystems “breath”, or exchange carbon dioxide (CO2) between the soil and the atmosphere, is critical to carbon cycle research. An important component is to understand the rate at which CO2 is lost from the ecosystem; however, measuring concentrations and fluxes alone cannot discern contributions from different components of the ecosystem. For example, a molecule of carbon dioxide that moves from the soil to the atmosphere may be due to geogenic or biological processes, and the latter can include respiration of soil microorganisms, plant roots, or a mixture of both. By evaluating the isotopic composition of the CO2 in soils, we can uncover information about the origin and underlying processes that control CO2 production. The purchase of a CO2 Isotope Analyzer will allow us to gain a better understanding of the carbon cycle in NSF-funded research across a variety of ecosystems and will support ongoing educational and outreach activities. This project seeks to purchase an isotope analyzer along with peripherals to perform measurements of the efflux and isotopic signature of 13C-CO2 across a variety of NSF-funded research projects. Soil CO2 fluxes and 13C-CO2 are complementary information to understand the underlying processes of CO2 production and provide insights on carbon cycling from local to global scales. New technological advances allow to perform these measurements in situ and in a continuous way to better understand the temporal dynamics of soil CO2 production and efflux. The purchase of a CO2 Isotope Analyzer will allow us to gain a better understanding of the carbon cycle in multiple NSF-funded projects across a variety of ecosystems and will support ongoing educational and outreach activities.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.

了解生态系统如何“呼吸”或在土壤和大气之间交换二氧化碳（CO2）对于碳循环研究至关重要。一个重要的组成部分是了解二氧化碳从生态系统中损失的速率。但是，仅测量浓度和通量不能辨别生态系统不同组成部分的贡献。例如，从土壤转移到大气的二氧化碳分子可能是由于地球或生物过程引起的，后者可以包括土壤微生物，植物根或两者的混合物的呼吸。通过评估土壤中二氧化碳的同位素组成，我们可以发现有关控制二氧化碳生产的原点和基础过程的信息。购买二氧化碳同位素分析仪将使我们能够更好地了解各种生态系统中NSF资助的研究中的碳循环，并将支持正在进行的教育和推广活动。该项目旨在购买同位素分析仪以及外围设备，以在各种NSF资助的研究项目中对13C-CO2的外排和同位素签名进行测量。土壤二氧化碳通量和13C-CO2是完整的信息，可以了解二氧化碳生产的基本过程，并提供有关从局部到全球尺度的碳循环的见解。新的技术进步允许以原位和连续的方式进行这些测量，以更好地了解土壤二氧化碳生产和外排的临时动态。购买二氧化碳同位素分析仪将使我们能够更好地了解多个生态系统中多个NSF资助的项目中的碳循环，并将支持持续的教育和外展活动。该奖项反映了NSF的法定任务，并通过评估该基金会的智力优点和广泛的影响来审查CRITERIA，并被认为是值得通过评估的支持。