Examining the extra-tropical upper troposphere and lower stratosphere using remote sensing limb-sounder measurements of unprecedented vertical resolution

使用具有前所未有的垂直分辨率的遥感临边探测仪测量检查温带对流层上层和平流层下层

• 批准号: 213927912
• 负责人: Dr. Joern Ungermann
• 金额: --
• 依托单位: IEK-7: Stratosphäre
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/213927912?language=en
• 关键词: Examining; extra; tropical; upper; troposphere

Trace gas exchange between troposphere and stratosphere greatly contributes to upper troposphere and lower stratosphere (UTLS) composition changes and variability, which are major drivers of surface climate change. This points to the need of a better quantitative understanding of processes in the UTLS. Infrared limb sounding from research aircrafts can provide 2-D cross-sections of multiple trace gas species. In contrast to conventional limb sounders, which are unable to resolve the observed airmass along their line-of-sight, the new GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) instrument enables the 3-D reconstruction of trace gas distributions. This will, among other things, provide highly resolved snapshots of mixing processes than can enhance our quantitative understanding thereof.The proposed work will use GLORIA measurements to reconstruct tracers, which best characterise tropospheric and stratospheric air. First, the best retrievable tracers need to be identified. In a second step the distortion imposed by the retrieval process will be reduced as much a possible. Finally, the derived tracers will be used to analyse the chemical tropopause and horizontal mixing in the vicinity of the sub-tropical jet.

对流层和平流层之间的痕量气体交换极大地有助于对流层和下层平流层（UTLS）组成变化和变异性，这是表面气候变化的主要驱动因素。这表明需要对UTL中的过程有更好的定量理解。研究飞机发出的红外肢体可以提供多种痕量气体物种的2D横截面。与传统的肢体发声器相反，传统的肢体声音无法解析沿其视线的观察到的空气质量，新的gloria（用于大气的辐射成像的旋转肢体观察者）仪器可以实现痕量气体分布的3-D重建。除其他外，这将为混合过程提供高度分辨的快照，而不是增强我们的定量理解。拟议的工作将使用Gloria测量来重建示踪剂，这是对流层和平流层空气的最佳特征。首先，需要确定最好的可检索示踪剂。在第二步中，检索过程施加的失真将尽可能减少。最后，衍生的示踪剂将用于分析亚热带射流附近的化学对流层顶和水平混合。