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，其中一个重要组成部分是了解二氧化碳从生态系统中流失的速度，测量浓度和浓度。仅靠通量无法辨别生态系统不同组成部分的贡献，例如，从土壤移动到大气中的二氧化碳分子可能是由于地理或生物过程造成的，后者可能包括土壤微生物、植物根系的呼吸作用。或两者的混合。通过评估土壤中二氧化碳的同位素组成，我们可以揭示有关控制二氧化碳产生的起源和基本过程的信息。购买二氧化碳同位素分析仪将使我们能够更好地了解国家科学基金会资助的研究中的碳循环。该项目旨在购买同位素分析仪以及外围设备，以测量 13C-CO2 的流出和同位素特征。各种 NSF 资助的研究项目和 13C-CO2 是了解 CO2 产生的基本过程并提供有关从本地到全球范围内的碳循环的见解的补充信息。购买二氧化碳同位素分析仪将使我们能够更好地了解多个碳循环。 NSF 资助的项目涵盖各种生态系统，并将支持正在进行的教育和推广活动。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。