Hygroscopic Growth of Accumulation Mode Particles Measured with HALO (HyGroPart)

使用 HALO (HyGroPart) 测量累积模式颗粒的吸湿生长

• 批准号: 47387451
• 负责人: Dr. Markus Hermann
• 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: Infrastructure Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/47387451?language=en
• 关键词: Hygroscopic; Growth; Accumulation; Mode; Particles

Atmospheric aerosol partials in the size range 0.1 to 10 μm contribute to direct and indirect radiative forcing of climate. Two important particle properties in this context are their hygroscopicity (growth behavior at changing relative humidity) and their mixing state (distribution of chemical components among the particles). In situ measurements of these particles properties in the free troposphere are needed in order to improve atmospheric models and for validating remote sensing instruments. In this project, we propose the application of the Micrometer Aerosol Inlet (MAI) and the Tandem Optical Particles Counter (TOPC), developed in phase 1 of the HALO SPP, during two HALO demo missions (ACRIDICON and NARVAL). The TOPC downstream MAI will measure the particle size and the hygroscopic growth of accumulation mode particles. These measurements can help to quantify the direct aerosol forcing, to understand particle aging, and to determine the particle mixing state. During ACRIDICON the focus is on the influence deep convective clouds have on aerosol particles. During NARVAL in particular particle aging with long-range transport and the influence of particles on trade wind clouds shall be investigated.

0.1 ~ 10 μm尺度的大气气溶胶粒子对气候的直接和间接辐射强迫都有贡献。在这种情况下，两个重要的颗粒特性是它们的吸湿性（在变化的相对湿度下的生长行为）和它们的混合状态（颗粒之间化学成分的分布）。为了改进大气模型和验证遥感仪器，需要对自由对流层中这些粒子的特性进行现场测量。在这个项目中，我们提出的应用微米气溶胶入口（MAI）和串联光学粒子计数器（TOPC），在第一阶段的HALO SPP，在两个HALO演示任务（ACRIDICON和NARVAL）。TOPC下游MAI将测量积聚模式颗粒的粒度和吸湿性生长。这些测量可以帮助量化的直接气溶胶强迫，了解粒子老化，并确定粒子混合状态。在ACRIDICON期间，重点是深对流云对气溶胶粒子的影响。特别是在NARVAL期间，应调查远距离输送的粒子老化和粒子对信风云的影响。