New Constraints on Size-resolved Submicron Sea-salt Particle Production from Ocean Breaking Waves

海洋气溶胶在控制地球辐射平衡、云的形成和微物理方面起着重要作用。关于海雾气溶胶排放的一个特别的知识缺口在于海盐对海洋边界层（MBL）云凝结核（CCN）预算的贡献尚未完全表征。对气候模型最为关键的50至200纳米大小的浪花颗粒，其化学成分被描述为纯有机、纯海盐或两者的混合物。这些亚微米粒子的生产通量特别令人感兴趣。该项目将有助于开发改进的参数化，以确定依赖于大小和成分的海洋喷雾颗粒的产生通量，这些通量需要在区域和气候模式中约束天然气溶胶的CCN通量。北卡罗莱纳州立大学（NCSU）的研究人员将部署一个专门设计用于测量大小分辨的干海盐（内部）核心的湍流通量的松弛涡流积累（REA）通量系统。REA-S通量系统将部署在美国陆军工程兵团（USACE）位于北卡罗来纳州Duck的560米长的研究码头设施中，被选中对具有代表性的MBL条件进行采样。为中学生和他们的教师设计的基于船舶的环境教育计划，以及将数据分析整合到课堂教学中的大学和K-12学习材料和课程的开发将被使用。这样做的一个目标是增加对影响大气和海洋科学过程的因素的了解，这些因素与云的形成和随后对气候的影响有关。

Marine aerosols play an important role in controlling the Earth's radiation balance, cloud formation and microphysics. One particular knowledge gap in sea spray aerosol emissions resides in the incompletely characterized contribution of sea-salt to the cloud condensation nuclei (CCN) budget in the marine boundary layer (MBL). The chemical composition of 50 to 200 nm sized sea spray particles, most critical to climate models, is variously described as purely organic, purely sea-salt or mixtures of both. The production fluxes of these sub-micron particles is of particular interest. This project will help developing improved parameterizations for size- and composition-dependent production fluxes of sea spray particles needed to constrain the CCN fluxes of natural aerosols in regional and climate models.North Carolina State University (NCSU) investigators will deploy a relaxed eddy accumulation (REA) flux system specifically designed to measure turbulent fluxes of size-resolved dry sea-salt (inner) cores. The REA-S flux system will be deployed at the U.S. Army Corps ofEngineers (USACE) 560 m long research pier facility at Duck, NC, chosen to sample representative MBL conditions.A ship based environmental education program designed for secondary and high school students and their teachers, and development of university and K-12 learning materials and curricula that integrate data analysis into classroom instruction will be used. A goal of this is for increased understanding of factors affecting atmospheric and marine science processes as related to cloud formation and subsequent effects on climate.