RAPID: Airborne Measurements of Black Carbon Aerosol and Its Mixing State over the Eastern Pacific/Central Coast of California

该项目支持部署一种仪器，在计划于2018年6月中旬至7月中旬在加州蒙特雷附近进行的实地研究期间测量大气中的黑碳（BC）。 该仪器将成为海军研究办公室双水獭飞机上更广泛的气溶胶、云和降水探测器套件的一部分，其目标是评估气溶胶颗粒对海洋云的影响。 这些数据将用于评估船舶废气和生物量燃烧对海洋大气的影响，详细分析单粒子烟尘光度计（SP2）数据将用于确定黑碳气溶胶的混合状态，即每个粒子上与黑碳混合的非耐火材料的数量。 黑碳气溶胶的性质将与采样空气质量的后向轨迹分析一起使用，以确定不同类型的黑碳颗粒是否可归因于不同的来源。 通过该项目进行的测量将解决以下问题：（1）东太平洋BC气溶胶的性质（粒度分布和混合状态）与其他偏远海洋环境中进行类似测量的情况相比如何？(2)BC气溶胶的性质是否可以用来确定气溶胶的来源？BC气溶胶混合状态与海洋边界层中粒子清除的关系是什么？该奖项反映了NSF的法定使命，并被认为是值得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的支持。

This project supports the deployment of an instrument to measure black carbon (BC) in the atmosphere during a field study that is planned to take place during mid-June through mid-July 2018, near Monterey, California. The instrument will be part of a broader suite of aerosol, cloud, and precipitation probes to be flown on the Office of Naval Research Twin Otter aircraft with the goal of assessing the effects of aerosol particles on marine clouds. These data will be used to assess the influence of ship exhaust and biomass burning on the marine atmosphere.Detailed analysis of Single Particle Soot Photometer (SP2) data will be used to determine the mixing state of black carbon aerosol; that is, the amount of non-refractory material mixed with black carbon on a per-particle basis. The nature of black carbon aerosol will be used with back trajectory analysis of the sampled air masses to determine if different types of black carbon particles can be attributed to different sources. The measurements made through this project will address questions such as: (1) How does the nature (size distribution and mixing state) of BC aerosol in the Eastern Pacific compare to that in other remote, marine environments where similar measurements have been performed? (2) Can the nature of BC aerosol be used to determine the source of that aerosol? And (3) What is the relationship between BC aerosol mixing state and particle scavenging in the marine boundary layer?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.