MRI: Acquisition of a Single Particle Soot Photometer system optimized to quantify black carbon and iron oxide aerosols

该项目使定制的单颗粒烟尘光度计(SP2)仪器与差动迁移率分析仪(DMA)相结合，能够同时测量耐火黑碳(RBC)和氧化铁气溶胶的尺寸分辨率。该仪器系统将广泛应用于大气、雪、冰芯和湖泊沉积物环境研究项目。该项目的主要目标是开发可靠的、时间分辨率相对较高的、空间分布的北极东部湖泊沉积岩芯中难熔黑碳浓度、通量和颗粒质量分布的记录，并利用这些和现有的冰芯、木炭和其他古气候记录来定量了解RBC和生物质燃烧排放的历史和气候驱动因素。将受益于获得定制的SP2和DMA系统的研究包括：(1)美国国家科学基金会资助的冰和湖泊沉积岩心的古火灾重建，(2)吸收光粒子在季节性雪盖上沉积引起的辐射强迫和融化变化及其对地表水资源影响的模拟，以及(3)大气研究，如长期大气监测，车辆刹车和轮胎磨损造成的气溶胶特性，以及现代生物质燃烧气溶胶和夹带尘埃样品的特性。该系统将安装在DRI的痕量化学/冰芯实验室，该实验室接待了大量博士后研究人员和高中、本科生、这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This project enables the acquisition of a customized Single Particle Soot Photometer (SP2) instrument coupled with a differential mobility analyzer (DMA) for simultaneous, size-resolved measurements of refractory black carbon (rBC) and iron oxide aerosols. This instrument system will be used in a wide range of atmospheric, snow, ice core, and lake sediment environmental research projects. The primary goal of this project is to develop reliable, relatively high-time-resolution, spatially distributed records of refractory black carbon concentration, flux, and particle mass distribution from lake sediment cores in the eastern Arctic and to use these and existing ice core, charcoal, and other paleoclimate records to develop a quantitative understanding of the history and climate drivers of rBC and biomass burning emissions.Research that will benefit from acquisition of the customized SP2 and DMA system includes: (1) NSF-funded paleo fire reconstructions in ice and lake sediment cores, (2) radiative forcing and melt changes resulting from deposition of light absorbing particles on seasonal snow covers and the modeling the effects on surface water resources, and (3) atmospheric research such as long-term atmospheric monitoring, characterization of aerosols from vehicle brake and tire wear, and characterization of modern biomass burning aerosols and entrained dust samples.The system will be housed in DRI’s Trace Chemistry/Ice Core Lab that has hosted a large number of post-doctoral researchers and high school, undergraduate, and graduate students over the past decade.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.