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

格陵兰岛 GEOSummit 的大气碳氢化合物作为北极气候变化、空气污染传输和氧化化学的示踪剂

• 批准号: 1108391
• 负责人: Detlev Helmig
• 金额: $ 46.23万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1108391&HistoricalAwards=false
• 关键词: Atmospheric; Hydrocarbons; GEOSummit; Greenland; Tracers

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.

这项研究是对北极观测网络（AON）的贡献。 它将在格陵兰环境观测站对大气甲烷和非甲烷碳氢化合物（非甲烷碳氢化合物;乙烷、乙炔、丙烷、异丁烷、正丁烷、异戊烷、正戊烷、苯、甲苯）进行为期4年的连续测量。将部署一个现有的监测系统，该系统以前在首脑会议上运行了两个季度。 这款气相色谱仪是专门为在这个偏远的北极地区操作而定制的，因为它是全自动和远程控制的。该仪器使用最少的功率，不需要冷冻剂和压缩气体供应，这使得它非常有利，并具有成本效益的首脑会议的条件。 将增加第二个分析通道，包括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年的甲烷连续大气浓度数据，时间分辨率约为2小时，并在Summit提供9种C2-C7 NMHC，灵敏度为低万亿分之一（NMHC）。这些数据将在Summit之前的2008-2010年NMHC测量的基础上进行扩展，并将提供这些气体的8年（有2年的差距）记录。 更广泛的影响：这些测量将高度补充NOAA-INSTAAR全球烧瓶采样计划内的非主要烃类监测，该计划在过去7年中为五个北极站点提供了每两周一次的非主要烃类数据。 本研究的高分辨率原位数据将为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低纬度不同排放源区域的贡献。甲烷和NMHC监测将为世界气象组织（WMO）全球大气监测（GAW）挥发性有机化合物（VOC）计划做出关键贡献，因为它将提供北极地区唯一的高时间分辨率原位NMHC站点。这一观察活动也将在课堂教学和研讨会上提出，并纳入INSTAAR？的推广计划，即在？臭氧和雪？教育网站。 该项目将促进科罗拉多大学的研究所与瑞士欧洲大气研究所的大气研究人员之间的新合作。