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

RAPID：东太平洋/加利福尼亚中部海岸上空黑碳气溶胶及其混合状态的机载测量

• 批准号: 1833008
• 负责人: Andrew Metcalf
• 金额: $ 10.37万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-06-01 至 2020-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1833008&HistoricalAwards=false
• 关键词: RAPID; Airborne; Measurements; Black; Carbon

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.

该项目支持在计划于 2018 年 6 月中旬至 7 月中旬在加利福尼亚州蒙特雷附近进行的实地研究期间部署测量大气中黑碳 (BC) 的仪器。 该仪器将成为更广泛的气溶胶、云和降水探测器套件的一部分，将在海军研究办公室双水獭飞机上飞行，目的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尾气和生物质燃烧对海洋大气的影响。通过单粒子烟尘光度计（SP2）数据的详细分析，确定黑碳气溶胶的混合状态；即，以每个颗粒为基础与黑碳混合的非耐火材料的量。 黑碳气溶胶的性质将用于对采样气团进行反向轨迹分析，以确定不同类型的黑碳颗粒是否可以归因于不同的来源。 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（尺寸分布和混合状态）与其他进行了类似测量的偏远海洋环境中的气溶胶相比如何？ (2) BC气溶胶的性质是否可以用来确定该气溶胶的来源？ (3) BC 气溶胶混合状态与海洋边界层中的颗粒清除之间有什么关系？该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，认为值得支持。

项目成果

Characterization of Aerosol Hygroscopicity Over the Northeast Pacific Ocean: Impacts on Prediction of CCN and Stratocumulus Cloud Droplet Number Concentrations

东北太平洋气溶胶吸湿性特征：对 CCN 和层积云液滴数浓度预测的影响

• DOI: 10.1029/2020ea001098
• 发表时间: 2020-07
• 期刊: Earth and space science (Hoboken, N.J.)
• 作者: Schulze BC;Charan SM;Kenseth CM;Kong W;Bates KH;Williams W;Metcalf AR;Jonsson HH;Woods R;Sorooshian A;Flagan RC;Seinfeld JH
• 通讯作者: Seinfeld JH