EAGER: A New Method for Sampling Sea-Salt Aerosols

EAGER：海盐气溶胶采样的新方法

• 批准号: 1762166
• 负责人: Alison Nugent
• 金额: $ 13.6万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-11-01 至 2019-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1762166&HistoricalAwards=false
• 关键词: EAGER; New; Method; Sampling; Sea

Sea-salt aerosol form in marine environments from breaking waves, white capping, or bursting bubbles. They remain suspended in the air as tiny droplets and affect visibility. These droplets, known as Giant Cloud Condensation Nuclei (GCCN), are also hypothesized to play a role in cloud and precipitation development. Measurements of GCCN are limited and primarily come from an instrument that requires placement on an expensive research aircraft. This award will allow for the development of a low-cost, 3D-printed instrument that can make measurements of GCCN from kites and unmanned aircraft. The measurements will help to resolve questions about the role of GCCN in the development of clouds and precipitation, which will potentially make an impact on weather and climate modeling. Students will be involved in the design and testing of the system, providing them with hands-on research activities.The research team plans to develop a new, low-cost instrument to measure GCCN. GCCN are extremely efficient nuclei for condensation and rapid growth. Their role in cloud development is still considered an unknown in the cloud physics community. One hypotheses is that GCCN broaden the droplet spectrum and can accelerate precipitation initiation in warm clouds. GCCN are traditionally measured by exposing a microscope slide to the free air stream outside of an aircraft. The research team will develop a miniaturized version of the Giant Nucleus Impactor known as the mini-GNI that can be flown on kites or UASs. Kite measurements are initially targeted due to their ability to perform Eularian sampling at a consistent point over time. Also, multiple instruments can be attached to kites with the option of measuring multiple altitudes. The mini-GNI will be 3D-printed and run using a Raspberry Pi computer. The specific work tasks include testing of the kite setup, the Raspberry Pi system, and the complementary state variable measurements. The entire mini-GNI package will be flown multiple times and the samples will be collected and analyzed.

海盐气溶胶在海洋环境中由破碎的波浪、白色覆盖物或破裂的气泡形成。 它们以微小的水滴悬浮在空气中，影响能见度。 这些液滴被称为巨型云凝结核（GCCN），也被假设在云和降水的发展中发挥作用。 GCCN的测量是有限的，主要来自需要放置在昂贵的研究飞机上的仪器。 该奖项将允许开发一种低成本的3D打印仪器，可以从风筝和无人驾驶飞机上测量GCCN。 这些测量将有助于解决有关GCCN在云和降水发展中的作用的问题，这将可能对天气和气候建模产生影响。 学生将参与系统的设计和测试，为他们提供实践研究活动。研究团队计划开发一种新的低成本仪器来测量GCCN。 GCCN是凝结和快速生长的非常有效的核。 它们在云开发中的作用在云物理社区中仍然被认为是未知的。 一种假设是，全球云凝结核扩大了水滴谱，可以加速暖云中的降水起始。 传统上，通过将显微镜载玻片暴露于飞机外部的自由气流来测量GCCN。 该研究小组将开发一种微型版本的巨型核撞击器，称为迷你GNI，可以在风筝或UAS上飞行。 风筝测量最初是有针对性的，因为它们能够随着时间的推移在一致的点进行欧拉采样。 此外，多个仪器可以连接到风筝与测量多个高度的选择。 迷你GNI将由3D打印，并使用Raspberry Pi计算机运行。 具体的工作任务包括测试风筝设置、Raspberry Pi系统和补充状态变量测量。 整个小型GNI包装将多次飞行，并将收集和分析样品。