Atmospheric Hydrocarbons at GEOSummit, Greenland, as Tracers for Climate Change, Air Pollution Transport, and Oxidation Chemistry in the Arctic

这项研究是对北极观测网络(AON)的贡献。它将在格陵兰顶峰环境观测站进行为期4年的大气甲烷和非甲烷碳氢化合物(NMHC；乙烷、乙炔、丙烷、异丁烷、正戊烷、苯、甲苯)的连续测量。将部署以前在首脑会议运行了两个季节的现有监测系统。这台气相色谱仪器是专门为在这个偏远的北极地点操作而量身定做的，因为它是完全自动化和远程可控的。该仪器使用最低限度的电力，不需要制冷剂和压缩气体供应，这使得它非常有利，成本效益高，适合顶峰条件。将增加第二个分析通道，包括使用同一仪器监测重要的气候气体甲烷。智力优势：该项目将提供4年连续大气甲烷浓度数据，时间分辨率约为2小时，峰会上将提供9个C2-C7 NMHC，灵敏度为万分之几(NMHC)。这些数据将在峰会之前2008-2010年NMHC测量的基础上进行扩展，并将提供这些气体的总8年(间隔2年)的记录。更广泛的影响：这些测量将高度补充NOAA-INSTAAR全球烧瓶采样计划中的NMHC监测，该计划在过去7年中提供了五个北极站点的NMHC数据。来自这项研究的更高分辨率的现场数据将为NMHC烧瓶记录的解释增加价值。通过应用化学传输模型，现场数据将使研究人员能够破译进入北极的空气污染传输，以及不同排放源地区在较低纬度的贡献。甲烷和NMHC监测将为世界气象组织(WMO)全球大气观测(GAW)挥发性有机化合物(VOC)计划做出关键贡献，因为它将提供北极唯一的高时间分辨率现场NMHC站点。这项观察活动还将出现在课堂教学和研讨会上，并被纳入研训所S推广计划，即关于臭氧和雪？教育网站。该项目将促进科罗拉多大学的研训所和瑞士EMPA的大气研究人员之间的新合作。

This study is a contribution to the Arctic Observing Network (AON). It will undertake 4 years of continuous measurements of atmospheric methane, and non-methane hydrocarbons (NMHC; ethane, ethyne, propane, iso-butane, n-butane, iso-pentane, n-pentane, benzene, toluene) at the Greenland Environmental Observatory at Summit (GEOSummit). An existing monitoring system that has previously been operated at Summit for two seasons will be deployed. This gas chromatography instrument is specifically tailored towards operation at this remote arctic site, as it is fully automated and remotely controllable. This instrument uses a minimal amount of power and does not require cryogen and compressed gas supplies, which make it highly favorable and cost efficient for Summit conditions. A second analytical channel will be added to include monitoring of the important climate gas methane with the same instrument. Intellectual Merits: This project will deliver 4 years of continuous atmospheric concentration data of methane, with approximately 2 hour time resolution, and nine C2-C7 NMHC at low parts per trillion sensitivity (for NMHC) at Summit. These data will expand upon the previous 2008-2010 NMHC measurements from Summit, and will provide an overall 8 year (with a 2 year gap) record for these gases. Broader Impacts: These measurements will be highly complementary to the NMHC monitoring within the NOAA-INSTAAR global flask sampling program, which, for the past 7 years, has provided bi-weekly NMHC data for five arctic sites. The much higher resolution in-situ data from this study will add value to the interpretation of the NMHC flask records. By applying chemical transport modeling, the in-situ data will allow researchers to decipher air pollution transport into the Arctic and contributions from different emission source region contributions at lower latitudes. The methane and NMHC monitoring will make a pivotal contribution to the World Meteorological Organization (WMO) Global Atmospheric Watch (GAW) Volatile Organic Compound (VOC) program, as it will provide the only high time resolution in-situ NMHC site in the Arctic. This observational activity will also be presented in class room teaching and seminars and be incorporated in INSTAAR?s outreach program, i.e. on the ?Ozone and Snow? educational website. This project will promote a new collaboration between INSTAAR at the University of Colorado and atmospheric researchers at EMPA, Switzerland.