A new helicopter-borne measurement system for high resolution aerosol measurements in the lower atmosphere - Part 2, application to atmospheric measurements

用于低层大气中高分辨率气溶胶测量的新型直升机机载测量系统 - 第 2 部分，在大气测量中的应用

• 批准号: 19800961
• 负责人: Dr. Birgit Wehner
• 金额: --
• 依托单位: Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/19800961?language=en
• 关键词: new; helicopter; borne; measurement; system

Aerosol particle formation is ubiquitous in the atmosphere. It can lead to large numbers of ultrafine particles (diam. < 20 nm) which can grow by condensation to cloud condensation nuclei. These cloud condensation nuclei determine the properties of clouds and hence their climate impact. However, our current knowledge about particle formation processes is limited, mainly for technical reasons.In this application, we propose the development and application of a helicopter-borne aerosol measurement system to study particle formation events in the lower atmosphere (h < 3 km). In order to resolve the fine structures of such events and to analyze the balance equation of the aerosol particles, a fast measurement system (> 10 Hz) is needed. Therefore, we will develop a new mixing-type condensation particle counter, which will be the central part of the new aerosol measurement system. Fast measurements of the whole submicrometer particle size distribution and turbulence parameters will assist the data interpretation. With the new system, particle formation events caused by mixing processes on small scales at inversion layers in the cloud-free atmosphere as well as on cloud edges can be investigated for the first time in detail.

气溶胶颗粒形成在大气中无处不在。它可以导致大量的超细颗粒（直径<20 nm），它们可以通过缩合到云凝结核而生长。这些云凝结核决定了云的特性，从而确定了它们的气候影响。但是，我们目前对颗粒形成过程的了解是有限的，主要是出于技术原因。在此应用中，我们建议开发和应用直升机 - 传播的气溶胶测量系统来研究较低大气中的颗粒形成事件（H <3 km）。为了解决此类事件的精细结构并分析气溶胶颗粒的平衡方程，需要快速测量系统（> 10 Hz）。因此，我们将开发一个新的混合式冷凝颗粒计数器，该粒子柜台将成为新的气溶胶测量系统的中心部分。整个亚微米粒径分布和湍流参数的快速测量将有助于数据解释。借助新系统，可以首次详细研究由无云大气层和云边缘的反转层上的小尺度上的混合过程引起的粒子形成事件。