Characterization of Aeolus wind measurement errors

• Main Authors: Cossu, Federico, Portabella, Marcos, Lin, Wenming, de Haan, Siebren, Marseille, Gert-Jan, Stoffelen, Ad, Vogelzang, Jur
• Format: Still Image
• Language: English
• Published: European Space Agency 2022
• Subjects: Aeolus; Sea ice
• Online Access: http://hdl.handle.net/10261/331942

Living Planet Symposium, 23-27 May 2022, Bonn, Germany The resolution of regional numerical weather prediction (NWP) models has continuously been increased over the past decades, in part, thanks to the improved computational capabilities. At such small scales, the fast weather evolution is driven by wind rather than by temperature and pressure. Over the ocean, where global NWP models are not able to resolve wind scales below 100-150 km, regional models provide wind dynamics and variance equivalent to 25 km or lower. However, although this variance is realistic, it often results in spurious circulation (e.g., moist convection systems), thus misleading weather forecasts and interpretation. An accurate and consistent initialization of the evolution of the 3 dimensional (3-D) wind structure is therefore essential in regional weather analysis. The present study is carried out in the framework of the EUMETSAT research fellowship project entitled WIND-4D, which focuses on a comprehensive characterization of the spatial scales and measurement errors for the different operational space-borne wind products currently used and/or planned to be used in regional models. In addition, a thorough investigation and improvement of the 4-D (including time) consistency between different horizontal and/or vertical satellite wind products will be carried out. Such products include the Ocean and Sea Ice Satellite Application Facility (OSI SAF) scatterometer-derived sea-surface wind fields, the Nowcasting and Very Short-Range Forecasting (NWC) SAF Atmospheric Motion Vectors (AMVs), Aeolus and/or Infrared Atmospheric Sounding Interferometer (IASI) wind profiles. Densely sampled aircraft wind profiles (Mode-S) will be used to verify and characterize the satellite products. Moreover, data assimilation experiments of the consistent datasets into the HARMONIE-AROME regional model will be carried out in two different regions, i.e., the Netherlands and the Iberian Peninsula regional configurations. Regarding the characterization of the ...