Mini-DOAS measurements during the HALO Southtrac mission in fall 2019

2019 年秋季 HALO Southtrac 任务期间的迷你 DOAS 测量

• 批准号: 423217792
• 负责人: Professor Dr. Klaus Pfeilsticker
• 金额: --
• 依托单位: Institut für Umweltphysik
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/423217792?language=en
• 关键词: Mini; DOAS; measurements; during; HALO

The present proposal aims to support the participation of the mini-DOAS instrument in the Southtrac campaign in fall 2019, as well as to support the retrieval, interpretation and dissemination of the thereby measured data. The mini-DOAS instrument is a passive remote sensing instrument for simultaneous measurements of Nadir and Limb scattered skylight in the UV/vis/NIR spectral ranges from aboard the research aircraft HALO. The measurements support the sensitive detection of in-situ concentrations, vertical profiles and total atmospheric column amounts of atmospheric trace gases not measurable (BrO, OClO, IO, C2H2O2, and C3H4O2), or hardly measurable by other means (NO2, HONO, und CH2O). In addition, the measurements on the NIR provides means to simultaneously detect all three phases of H2O (liquid water and ice water path), some radiative properties of the atmosphere (e.g. relative radiances, and photon path length, …) and to collect information on the microphysical properties of aerosols and clouds. During Southtrac, the mini-DOAS measurements will contribute to three scientific objectives (CHEM-1_Q1, CHEM-1_Q2 and CHEM-2_Q1), as outlined in the envelope proposal. In particular, our measurements of (a) BrO (and IO) and photochemical calculations of the Bry (and Iy) partitioning will complete the respective halogen budgets (CHEM-1_Q), and the measurements of (b) BrO and OClO will constrain the ozone loss in the upper troposphere/lowermost stratosphere UTLS (CHEM-1_Q2). Finally, (c) the measurements of NO2, HONO and in particular of CH2O und C2H2O2 will assist to identify biomass burning affected air masses (CHEM-2_Q1).

本提案旨在支持微型DOAS仪器参与2019年秋季的Southtrac活动，并支持检索，解释和传播由此测量的数据。小型DOAS仪器是一种被动遥感仪器，用于从研究飞机HALO上同时测量紫外/维斯/近红外光谱范围内的天底和临边散射天空光。这些测量支持对无法测量的大气痕量气体（BrO、OClO、IO、C2 H2 O2和C3 H4 O2）或难以通过其他手段测量的大气痕量气体（NO2、HONO和CH 2 O）的原位浓度、垂直分布和大气柱总量的灵敏检测。此外，对近红外的测量提供了同时探测H2O的所有三个阶段（液态水和冰水路径）、大气的某些辐射特性（例如相对辐射和光子路径长度.）以及收集关于气溶胶和云的微物理特性的信息的手段。在Southtrac期间，微型DOAS测量将有助于实现信封提案中概述的三个科学目标（CHEM-1_Q1，CHEM-1_Q2和CHEM-2_Q1）。特别是，我们对（a）BrO（和IO）的测量和对Bry（和Iy）分配的光化学计算将完成各自的卤素收支（CHEM-1_Q），而对（B）BrO和OClO的测量将限制对流层上部/平流层最低UTLS中的臭氧损失（CHEM-1_Q2）。最后，（c）NO2、HONO，特别是CH 2 O和C2 H2 O2的测量将有助于确定受生物质燃烧影响的空气质量（CHEM-2_Q1）。