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、云的形成和微观物理方面发挥着重要作用。 一个特殊的知识差距，在海上喷雾气溶胶排放驻留在不完全特征的贡献海盐云凝结核（CCN）预算在海洋边界层（MBL）。50至200纳米大小的海雾颗粒的化学成分对气候模型至关重要，它们被描述为纯有机物、纯海盐或两者的混合物。这些亚微米颗粒的生产通量是特别感兴趣的。这个项目将有助于开发改进的参数化的大小和成分依赖的生产通量的海喷雾颗粒需要约束的CCN通量的天然气溶胶在区域和气候models.北卡罗来纳州州立大学（NCSU）的研究人员将部署一个宽松的涡流积累（REA）通量系统，专门设计来测量湍流通量的大小分辨干海盐（内）核心。REA-S通量系统将部署在位于北卡罗来纳州达克的美国陆军工程兵团（USACE）560米长的研究码头设施中，用于对具有代表性的MBL条件进行采样。将使用为中学和高中学生及其教师设计的基于船的环境教育计划，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。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.