EMBRACE-AGS-Seed: Decadal Trends of Atmospheric Ethane - Building Capacity for Trace Gas Analysis and Modeling at Portland State University

EMBRACE-AGS-Seed：大气乙烷的十年趋势 - 波特兰州立大学痕量气体分析和建模能力建设

• 批准号: 2409413
• 负责人: Christopher Butenhoff
• 金额: $ 20万
• 依托单位: Portland State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2409413&HistoricalAwards=false
• 关键词: EMBRACE; AGS; Seed; Decadal; Trends

This EMBRACE SEED project is focused on the study of current and historic ethane and methane concentrations in the atmosphere. Oxidation of these species contributes to production of ozone and secondary organic aerosol and affects the oxidizing capacity of the atmosphere. This research effort makes use of an unpublished archive at the Oregon Graduate Institute (OGI) of atmospheric ethane measurements collected in the early 1980s and will include new analyses for ethane in air samples collected during the period 1978–1998 at Cape Meares, Oregon. This project will lead to a better understanding of the distributions and historical trends of atmospheric ethane and methane and their significant impact on both air quality and climate.The research includes three primary activities: (1) Intercalibration of historic ethane observations from the OGI global monitoring network in the early 1980s with recent surface flask ethane measurements from the NOAA Carbon Cycle Greenhouse Gas Group; (2) Customization of the GEOS-Chem High Performance atmospheric chemistry model for ethane simulations; and (3) Inverse modeling studies of ethane within two periods that bracket the steep decline in concentrations of the gas from the 1980s to the 2000s. Due to its reaction with the hydroxyl radical (OH), ethane indirectly influences the lifetimes of many other trace gases in the atmosphere including methane (CH4). This research will enable the investigators to probe changes in the sources of ethane over decadal scales and develop new research projects that make use of the concentrations of both ethane and methane and their isotopes as tracers of oil and natural gas releases, as well emissions from wildfire and biomass burning.This seed proposal will help build research capacity for ethane and non-methane hydrocarbon gas research at Portland State University (PSU). The PIs plan to use the results from this SEED study to develop a full proposal to conduct future multi-tracer studies using ethane and methane and their isotopes to quantify the fluxes of these gases from natural and anthropogenic sources.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.

这个拥抱种子项目的重点是研究大气中当前和历史悠久的乙烷和甲烷浓度。这些物种的氧化有助于产生臭氧和二级有机气溶胶，并影响大气的氧化能力。这项研究工作利用了1980年代初期收集的大气乙烷测量结果的俄勒冈研究生研究所（OGI）未发表的档案，并将在1978 - 1998年在俄勒冈州开普梅勒斯（Cape Meares）收集的空气样本中对乙烷的新分析。 This project will lead to a better understanding of the distributions and historical trends of atmospheric ethane and methane and their significant impact on both air quality and climate.The research includes three primary activities: (1) Intercalibration of historical ethane observations from the OGI global monitoring network in the early 1980s with recent surface flask ethane measurements from the NOAA Carbon Cycle Greenhouse Gas Group; （2）为其他模拟的Geos-Chem高性能大气化学模型定制； （3）在两个时期内对Samene进行的反向建模研究，从1980年代到2000年代，气体浓度下降了钢的下降。由于它与羟基自由基（OH）的反应，萨梅纳间接影响了包括甲烷在内的大气中许多其他微量气的寿命（CH4）。 This research will enable the investigators to probe changes in the sources of the same over decadal scales and develop new research projects that make use of the concentrations of both ethane and methane and their isotopes as tracers of oil and natural gas releases, as well emissions from wildfire and biomass burning.This seed proposal will help build research capacity for the same and non-methane hydrocarbon gas research at Portland State University (PSU). PI计划利用这项种子研究的结果来制定一项完整的建议，以使用相同的和甲烷及其同位素进​​行未来的多跟踪研究，以量化自然和人为来源的这些气体的通量。该奖项反映了NSF的法规任务，并认为通过基金会的知识优点和广泛的critia critia criter criter criter criter criter critia criter critia criter critia criter critia criter critia criter critia criter criter criter critia criter critia criter critia criter criti criti criti criti criti criti critie criperia均可量化这些气体。