MRI: Acquisition of a High Resolution Proton-Transfer-Reaction Time-Of-Flight Mass Spectrometer (PTR-TOF-MS) for Research in Land And Atmospheric Science

该项目是美国国家科学基金会主要研究仪器计划的一部分，支持明尼苏达大学双子城分校购置一台新仪器，用于对大气中的有机化合物进行高精度测量。该仪器将在实地和实验室中同时使用。收集数据的现场地点包括UMN高塔天文台和密歇根大学生物站的PROPHET塔。从该仪器获得的新数据将用于提高对陆地-大气系统有机碳生物地球化学的科学认识，重点是大气成分、陆地-大气耦合以及驱动空气污染和全球变化的过程。该仪器是质子转移-反应飞行时间质谱仪（PTR-TOF-MS），将用于解决重要的科学问题，包括：(1)陆地-大气碳交换和挥发性有机化合物（VOCs）；(2)气相有机物的化学性质及老化；(3)有机气体-气溶胶相互作用；土壤有机碳生物地球化学。该仪器还将支持明尼苏达大学陆地与大气科学（LAAS）项目的研究生和本科生的教育。

This project, part of the NSF Major Research Instrumentation Program, supports the acquisition of a new instrument at the University of Minnesota (UMN) - Twin Cities for making highly accurate measurements of organic compounds in the atmosphere. The instrument will be used both in the field and in the laboratory. Field sites where data will be collected include the UMN Tall Tower Observatory and the PROPHET tower at the University of Michigan Biological Station. Newly acquired data from the instrument will be used to improve scientific understanding of the biogeochemistry of organic carbon in the land-atmosphere system, with an emphasis on atmospheric composition, land-atmosphere coupling, and the processes driving air pollution and global change.The instrument, a Proton-Transfer-Reaction Time-Of-Flight Mass Spectrometer (PTR-TOF-MS), will be used to address important scientific issues including: (1) Land-atmosphere carbon exchange and volatile organic compounds (VOCs); (2) Chemical properties and aging of gas-phase organics; (3) Organic gas-aerosol interactions; and (4) Organic carbon biogeochemistry in soils. The instrument will also support the education of graduate and undergraduate students in Land and Atmospheric Science (LAAS) Program at the University of Minnesota.