Fine Structure of the Stably Stratified Atmospheric Boundary Layer in Antarctica

作为Inst和Inst之间合作的要素。首页--期刊主要分类--期刊细介绍--期刊题录与文摘--文摘内容大学。布伦斯韦格(ILR)和英国南极调查局(HAS)总共三个小型气象飞行机器人(M2AV)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的大气边界层(SBL)的湍流特征。然后使用这些现场测量来验证、支持和完成已经安装的BAS SODAR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、间歇性和化石湍流以及(孤立)波。结构函数、多分辨共谱和小波分析的使用提供了层状SBL内湍流结构和输送的光谱特征的信息。对观测资料进行了反演，计算了湍流的梯度、散度和能量通量，从而量化了SBL与地面之间以及各层之间的湍流能量传递。此外，还验证了安装的遥感系统的水平代表性。在上一个项目PSBL中，已经创建了一个关于北极海冰上空直升机脚架飞行的大型质量控制数据库(极地战役方舟十一号、方舟十二号和方舟十九号)。这个数据库现在被用来分析大陆架冰(南极)和海冰(北极)上的SBL之间的相似和差异。该项目将有助于了解特别是在极地条件下SBL的具体要素和进程。在项目开始时，所有的实验和期刊将已经完成。因此，我们只用人力来分析来自哈雷站和M2AVs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.