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微量气体交换极大地促进了对流层上部和平流层下部（UTLS）的成分变化和变率，这是地面气候变化的主要驱动力。这表明需要更好地定量了解UTLS中的过程。研究飞机的红外临边探测可以提供多种示踪气体种类的二维截面。传统的临边探测器无法分辨沿其视线沿着观测的气团，与之相反，新的格洛丽亚（用于大气辐射成像的万向节临边观测器）仪器能够对痕量气体分布进行三维重建。除其他外，这将提供混合过程的高分辨率快照，而不是可以提高我们对混合过程的定量理解。拟议的工作将使用格洛丽亚测量数据来重建示踪剂，这最好是对流层和平流层空气。首先，需要确定最好的可回收示踪剂。在第二步骤中，将尽可能地减少由检索过程施加的失真。最后，导出的示踪剂将被用来分析化学对流层顶和水平混合附近的副热带急流。