Investigating the impact of new active remote sensing instruments on Numerical Weather Prediction (NWP) models and developing observing strategies for these instruments for future field campaigns and operational applications

调查新型主动遥感仪器对数值天气预报（NWP）模型的影响，并为这些仪器制定观测策略，以供未来的实地活动和业务应用

• 批准号: 60884605
• 负责人: Dr. Martin Weissmann
• 金额: --
• 依托单位: Institut für Meteorologie und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/60884605?language=en
• 关键词: Investigating; impact; new; active; remote

The first assimilation of airborne Doppler lidar observations in a global weather forecast model recently demonstrated that such observations can significantly reduce analysis and forecast errors. However, the observational data base was limited to eight research flights. Similar impact studies using airborne water vapour lidar data led to forecast deterioration, but the data set was too small to fully explain reasons for the negative impact. In the near future, DLR is planning to deploy an airborne Doppler lidar together with a water vapour lidar during several field campaigns. This is expected to provide a unique data set to investigate the sensitivity of forecast models to initial conditions and to improve the understanding of physical processes causing high-impact weather. This project intends to develop and evaluate adaptive observing strategies for upcoming field campaigns using airborne lidars and will investigate the applicability of an operational adaptation of the observing system to sensitive areas. The collected observations will be assimilated in the ECMWF global model to investigate the value of targeted observations, the potential of air- and spaceborne lidars for the future observing system, and will investigate extra-tropical transition (ET) of tropical cyclones through dedicated sensitivity studies.

最近，在全球天气预报模式中首次同化机载多普勒激光雷达观测结果表明，这种观测结果可以大大减少分析和预报误差。然而，观测数据库仅限于8次研究飞行。使用机载水蒸气激光雷达数据进行的类似影响研究导致预测恶化，但数据集太小，无法充分解释负面影响的原因。在不久的将来，德国航天中心正计划在几次实地活动中部署一个机载多普勒激光雷达和一个水蒸气激光雷达。预计这将提供一个独特的数据集，以调查预测模型对初始条件的敏感性，并提高对造成高影响天气的物理过程的理解。该项目旨在为即将开展的使用机载激光雷达的实地活动制定和评估适应性观测战略，并将调查观测系统对敏感地区的业务适应性的适用性。收集到的观测数据将被纳入欧洲中期天气预报中心的全球模型，以调查目标观测的价值、空中和空间激光雷达在未来观测系统中的潜力，并将通过专门的敏感性研究调查热带气旋的热带外转变。

项目成果

The Influence of Assimilating Dropsonde Data on Typhoon Track and Midlatitude Forecasts

• DOI: 10.1175/2010mwr3377.1
• 发表时间: 2011-03
• 期刊: Monthly Weather Review
• 影响因子: 3.2
• 作者: M. Weissmann;F. Harnisch;Chun‐Chieh Wu;P. Lin;Y. Ohta;K. Yamashita;Yeonchun Kim;E. Jeon;T. Nakazawa;S. Aberson