High-resolution large eddy simulation (LES) model dedicated to comparisons with high-resolution data achieved with advanced lidar systems

高分辨率大涡模拟 (LES) 模型，专用于与先进激光雷达系统获得的高分辨率数据进行比较

• 批准号: 5380339
• 负责人: Professorin Dr. Tijana Janjic Pfander
• 金额: --
• 依托单位: Mathematisches Institut für Maschinelles Lernen und Data Science
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2003-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5380339?language=en
• 关键词: resolution; large; eddy; simulation; LES

In this work we will develop a high-resolution large eddy simulation (LES) model dedicated to comparisons with high-resolution data obtained with advanced lidar systems. The model is based on a LES model developed at the Max-Planck-Institute for Meteorology in Hamburg. The model output will be compared with accurate and high-resolution profiles of atmospheric variables collected with a coherent Doppler wind lidar as well as a water vapor differential absorption lidar. Both lidar systems represent the state-of-the-art lidar technology. The model will also be designed for comparisons with future lidar systems which are currently under development. These comparisons will be appplied to investigate turbulent transport processes in the atmospheric boundary layer including the entrainment zone. Due to the high resoltion of the LES runs as well as the lidar data, a new quality in the investigation and validation of LES results will be reached. Comparison of the two will allow us to better unterstand and alleviate the impact of imperfections of the LES approach, test the accuracy of the data obtained with the lidar system in the entrainment zone, and to try to explain the discrepancies which have been observed between the LES results and the lidar data in the entrainment zone. Designs of a synergy of lidar measurements and LES will be propesed allowing for the development of more accurate paramerizations of boundary layer and subgridscales processes in weather prediction and climate models. We are convinced that the synergy of LES and unique lidar data will lead to a better understanding of atmospheric processes and models.

在这项工作中，我们将开发一个高分辨率的大涡模拟（LES）模型，专门用于与先进激光雷达系统获得的高分辨率数据进行比较。该模型基于汉堡马克斯-普朗克气象研究所开发的LES模型。模型输出将与相干多普勒风激光雷达和水汽微分吸收激光雷达收集的精确和高分辨率大气变量剖面进行比较。两种激光雷达系统都代表了最先进的激光雷达技术。该模型还将用于与目前正在开发的未来激光雷达系统进行比较。这些比较将被应用于研究包括夹带带在内的大气边界层中的湍流输送过程。由于高分辨率的LES运行和激光雷达数据，LES结果的研究和验证将达到一个新的水平。两者的比较将使我们更好地理解和减轻LES方法的不完善的影响，测试激光雷达系统在夹带区获得的数据的准确性，并试图解释已经观察到的LES结果与激光雷达在夹带区数据之间的差异。将提出激光雷达测量和LES协同的设计，以便在天气预报和气候模式中开发更准确的边界层和亚网格尺度过程参数化。我们相信，LES和独特的激光雷达数据的协同作用将使我们更好地了解大气过程和模式。