Mixing processes in the stratosphere from fine to global scales with a fast high precision QCL spectrometer for N2O and CO on HALO

使用快速高精度 QCL 光谱仪在 HALO 上对 N2O 和 CO 进行从精细到全局尺度的平流层混合过程

• 批准号: 316833890
• 负责人: Professor Dr. Peter Hoor
• 金额: --
• 依托单位: Institut für Physik der Atmosphäre
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316833890?language=en
• 关键词: Mixing; processes; stratosphere; fine; global

Within this proposed work we will use novel highly resolved tracer measuremnents to study mixing processes at different scales to 1) investigate the effect of the TIL on mixing and exchange 2) to resolve the decay of monsoon affected air within the stratosphere 3) to quantify the large scale fraction of air which is transported from different source regions into the extratropical upper troposphere / lower stratosphere (ExUTLS). For this purpose we propose to apply a novel state-of-the-art instrument to the HALO payload. The instrument is a quantum cascade laser absorption spectrometer capable of simultaneously measuring CO and N2O with a precision of 0.1 ppbv/Hz and a maximum time resolution of 3Hz. The high precision allows to study mixing processes with unprecedented detail and to identify mixing between different air masses within the stratosphere. We will investigte the processes which lead to a degradation of monsoon affected filaments and mixing as well as the large scale distribution of these tracers. Combining CLaMS trajectory analysis with a CO based budget approach allows to quantify the fraction and origin of air masses which determine the composition of the ExUTLS during the monsoon season. We will extend the analysis also to data from the HALO project POLSTRACC, which took place in winter and spring to calculate a seasonaly contrasting air mass budget.

在这项拟议的工作中，我们将使用新的高分辨率示踪剂测量研究不同尺度的混合过程，以1）调查TIL对混合和交换的影响，2）解决季风影响的空气在平流层内的衰减，3）量化从不同来源地区输送到对流层上部/平流层下部（ExUTLS）的大尺度空气比例。为此，我们建议将一种新的最先进的仪器应用于HALO有效载荷。该仪器是一种量子级联激光吸收光谱仪，能够同时测量CO和N2 O，精度为0.1 ppbv/Hz，最大时间分辨率为3 Hz。高精度允许以前所未有的细节研究混合过程，并确定平流层内不同空气质量之间的混合。我们将讨论导致季风影响的细丝退化和混合的过程，以及这些示踪剂的大尺度分布。将CLaMS轨迹分析与基于CO的预算方法相结合，可以量化确定季风季节ExUTLS组成的空气质量的分数和来源。我们还将分析扩展到HALO项目POLSTRACC的数据，该项目在冬季和春季进行，以计算季节性对比的空气质量预算。