MRI: Acquisition of a Mass Spectrometric System for Determination of Biogeochemical Fluxes Between the Atmospheric and Marine Environment

这些项目正在申请资金，以购买一台扫描迁移率粒度仪、一台质子转移飞行时间质谱仪（PRToFMS）和一台同位素比质谱仪。这套仪器将允许pi检查生物地球化学特性和反应机制，并允许对海洋和大气环境之间有机气体和凝聚态物质交换的过程进行建模。拟议的仪器支持的研究工作包括调查：初级海洋气溶胶的有机组分；海洋生物驱动的挥发性有机化合物（VOC）排放；区分海洋和陆地排放的特定化合物同位素组成；冰芯中一氧化碳的同位素组成；有机气溶胶粒子的化学转化；化学时效对冰形核的影响多氯联苯在矿物表面的转化；新型光催化还原二氧化碳成烃催化剂的研制沉积成岩作用与海底通量；重建浅封闭海湾的食物网结构。更广泛的影响拟议中的仪器将为海洋和大气科学学院以及石溪大学和布鲁克海文国家实验室提供扩展的分析能力。此外，拟议的仪器将被纳入该机构现有的REU计划，以及科学和技术入门暑期住宿计划，为本科生和中学生提供实践培训机会。

Intellectual MeritThe PIs are requesting funds to acquire a scanning mobility particle sizer, a Proton Transfer Time of Flight mass spectrometer (PRToFMS), and an isotope ratio mass spectrometer. This suite of instrumentation will allow the PIs to examine biogeochemical properties and reaction mechanisms, and allow modeling of processes that govern the exchange of organic gaseous and condensed matter between the marine and atmospheric environments. Research efforts enabled by the proposed instrumentation include investigations into: the organic fraction of primary marine aerosols; marine biogenically driven volatile organic compound (VOC) emissions; compound-specific isotopic composition to differentiate between marine and terrestrial emissions; isotopic composition of carbon monoxide trapped in ice cores; chemical transformation of organic aerosol particles; effect of chemical aging on ice nucleation; polychlorinated biphenyl transformations on mineral surfaces; development of novel catalysts for photocatalytic reduction of carbon dioxide into hydrocarbons; sedimentary diagenetic processes and seabed fluxes; and reconstructing food web structure in shallow enclosed bays. Broader ImpactsThe proposed instrumentation will provide expanded analytical capability for the School of Marine and Atmospheric Sciences, as well as across Stony Brook University and Brookhaven National Laboratory. Additionally, the proposed instrumentation will be incorporated into the existing REU program at the institution, as well as into the Science and Technology Entry summer residential program, providing hands-on training opportunities for both undergraduates and secondary school students.