Fine Structure of the Stably Stratified Atmospheric Boundary Layer in Antarctica

南极稳定层状大气边界层的精细结构

• 批准号: 26948898
• 负责人: Professor Dr. Jens Bange
• 金额: --
• 依托单位: Arbeitsgruppe Umweltphysik
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/26948898?language=en
• 关键词: Fine; Structure; Stably; Stratified; Atmospheric

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.

作为研究所之间合作的要素。 f。 luft- und raumfahrtsysteme，技术。大学。 Braunschweig（ILR）和英国南极调查（HAS）共有三个小型气象飞行机器人（M2AV）被送往Halley Station。那里的完全自主的飞机（在ILR开发）将测量冰架上方稳定大气边界层（SBL）的湍流特征。然后，这些原位测量值用于验证，支持和完成已经安装的BAS SODAR系统和气象塔。主要的研究目标是SBL的精细结构，尤其是在薄层，间歇性和化石湍流以及（孤立的）波浪方面。结构函数的使用，多分辨率的共光谱和小波分析提供了有关层次SBL内湍流结构和运输的光谱特征的信息。计算对观察到的数据，梯度，差异和能量通量的逆模型，以量化SBL和表面之间以及各个层之间的湍流能量转移。此外，还验证了已安装的遥感系统的水平代表性。在前面的项目中，PSBL已经创建了北极海冰的Helipod飞行（Polarstern Apvacients ARK-XI，ARK-XII和ARK-XIX）的大型质量控制数据库。现在，该数据库用于分析SBL在架子冰（南极）和海冰（北极）上的相似度和差异。该项目将有助于理解SBL的特定要素和过程，尤其是在极地条件下。在项目开始时，所有实验和期刊都将完成。因此，我们仅申请MAN Power来分析Halley Station和M2AV的唯一数据集。