MRI Track 1: Acquisition of an Aerosol Chemical Speciation System to Elucidate Sources, Formation Processes, and Environmental Impacts at ASU's AppalAIR Observatory

该主要研究仪器项目（MRI）支持气溶胶化学形态系统（ACSS）的开发，该系统将位于北卡罗来纳州布恩市阿巴拉契亚州立大学的阿巴拉契亚大气跨学科研究（AppalAIR）设施。在该设施进行的研究是基于详细的气溶胶化学成分测量的收集，这些测量将用于检查美国东南部阿巴拉契亚山区南部气溶胶浓度和来源之间关系的时空异质性及其与云、太阳辐射和气象的相互作用。这些数据对于更好地了解空气质量和气候的区域变化非常重要。所要求的ACSS将与科学和化学测量网络（ASCENT）的系统相同，该网络最近由NSF中型基础设施项目资助。AppalAIR站点也是NOAA FAN、NASA AERONET和NASA MPLNET气溶胶网络站点的所在地。该站点的数据将提供2.5微米以下（PM2.5）气溶胶耐火和非耐火化学成分的长期测量，以补充正在进行的气相气溶胶前体和气溶胶详细光学和微物理特性的测量。使用来自ACSS的数据的项目包括那些旨在提高对大气气溶胶水分吸收和吸湿性气溶胶作为云凝结核（CCN）的作用的理解的项目。这些数据对于模拟气溶胶-云相互作用和气溶胶直接辐射强迫至关重要。阿巴拉契亚州立大学是阿巴拉契亚山区南部农村地区的一所主要的本科院校。上述acss支持的项目将为本科生和研究生提供深入的实践研究机会，这将为他们进入就业市场或寻求更高学位提供优势。该项目由大气化学项目和大气与地球空间科学部共同资助，该部门支持在各种机构类型中增加研究能力、能力和基础设施的项目，如GEO EMBRACE DCL所述。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This Major Research Instrumentation Project (MRI) supports the development of an aerosol chemical speciation system (ACSS) to be located at the Appalachian Atmospheric Interdisciplinary Research (AppalAIR) facility at Appalachian State University in Boone North Carolina. The research to be conducted at this facility is based on the collection of detailed aerosol chemical composition measurements that will be used to examine the spatiotemporal heterogeneity in the relationships among the concentration and sources of aerosols and their interactions with clouds, solar radiation, and meteorology in the Southern Appalachian Mountain region of the southeastern US. This data is important for better understanding regional changes in air quality and climate.The requested ACSS will be an identical system to those that are part of the Science and Chemistry mEasurement NeTwork (ASCENT), recently funded by the NSF Mid-Scale Infrastructure Program. The AppalAIR site also is home to NOAA FAN, NASA AERONET, and NASA MPLNET aerosol network sites. Data from this site will provide long-term measurements of sub-2.5 micron (PM2.5) aerosol refractory and non-refractory chemical composition to complement ongoing measurements of gas phase aerosol precursors and aerosol detailed optical and microphysical properties. Projects that use will data from the ACSS include those that aim to improve the understanding of atmospheric aerosol water uptake and the role of hygroscopic aerosols as cloud condensation nuclei (CCN). This data is critical for modeling aerosol-cloud interactions and aerosol direct radiative forcing.Appalachian State University is a predominantly undergraduate institution in the rural southern Appalachian Mountain region. The ACSS-enabled projects mentioned above will provide in-depth, hands-on research opportunities for both undergraduate and graduate students that will give them an advantage when entering the job market or seeking advanced degrees. This project is jointly funded by the Atmospheric Chemistry Program and Division of Atmospheric and Geospace Sciences that support projects that increase research capabilities, capacity and infrastructure at a wide variety of institution types, as outlined in the GEO EMBRACE DCL.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.