Fine Structure of the Stably Stratified Atmospheric Boundary Layer in Antarctica

作为研究所之间合作的一部分。Luft- und Raumfahrtsysteme、布伦瑞克工业大学（ILR）和英国南极调查局（HAS）共三个小型气象飞行机器人（M2 AV）被送往哈雷站。在那里，完全自主操作的飞机（在ILR开发）将测量冰架上方稳定大气边界层（SBL）的湍流特性。这些现场测量结果将用于验证、支持和完成已经安装的BAS声雷达系统和气象塔。主要研究目标是SBL的精细结构，特别是关于薄层，间歇性和化石湍流和（孤立）波。利用结构函数、多分辨率共谱和小波分析，给出了层状SBL内湍流结构和输运的谱特征信息。应用反演模型的观测数据，梯度，发散和能量通量的计算，以量化的湍流能量传输之间的SBL和表面，以及各层之间。此外，安装的遥感系统的水平代表性进行了验证。在前一个项目PSBL中，已经建立了一个关于北极海冰上空直升机飞行（Polarstern活动ARK-XI、ARK-XII和ARK-XIX）的大型质量控制数据库。这个数据库现在被用来分析陆架冰（南极）和海冰（北极）上的SBL之间的相似性和差异。该项目将有助于理解特别是在极地条件下的SBL的特定元素和过程。在项目开始时，所有的实验和日志都将完成。因此，我们只申请人力来分析哈雷站和M2 AV的独特数据集。

As element of the cooperation between the Inst. f. Luft- und Raumfahrtsysteme, Techn. Univ. Braunschweig (ILR), and the British Antarctic Survey (HAS) in total three small meteorological flight robots (M2AV) are sent to Halley station. There the fully autonomously operating aircraft (developed at the ILR) are going to measure the turbulent characteristics of the stable atmospheric boundary layer (SBL) above the ice shelf. These in situ measurements are then used to verify, support and complete the already installed BAS sodar systems and the meteorological tower. Main research goal is the fine structure of the SBL especially regarding thin layers, intermittent and fossil turbulence, and (solitary) waves. The use of structure functions, multi-resolution co-spectra and wavelet analysis give information on the spectral characteristics of turbulent structure and transport within the layered SBL. Applying inverse models to the observed data, gradients, divergence and energy fluxes are calculated in order to quantify the turbulent energy transfer between SBL and surface, and between individual layers. Furthermore the horizontal representativeness of the installed remote sensing systems is validated. In the preceding project PSBL a large quality-controlled database from Helipod flights over Arctic sea ice (Polarstern campaigns ARK-XI, ARK-XII and ARK-XIX) was already created. This data base is now used to analyse the resemblance and difference between the SBL over shelf ice (Antarctic) and sea ice (Arctic). The project will contribute to the understanding of specific elements and processes of the SBL particularly under polar conditions. At the beginning of the project all experiments and journals will be already completed. Thus we apply only for man power to analyse the unique data sets from Halley station and M2AVs.