5th PhD report: Assimilation of 3D Radar Reflectivities with an Ensemble Kalman Filter on the Convective Scale
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| Title: | Main Title: 5th PhD report: Assimilation of 3D Radar Reflectivities with an Ensemble Kalman Filter on the Convective Scale |
| Description: | Abstract: An ensemble data assimilation system for 3D radar reflectivity data on the convective scale is introduced for the convection permitting numerical weather prediction model COSMO. KENDA, developed by Deutscher Wetterdienst (DWD) and its partners, provides a state-of-the-art ensemble data assimilation system on the convective scale for operational data assimilation and forecasting based on a variant of the ensemble Kalman filter. In this study, the radar forward operator EMVORADO is applied for the assimilation of radar reflectivity data to improve short-term model predictions of precipitation. Both deterministic and ensemble forecasts have been carried out based on KENDA. A case study shows that the assimilation of 3D radar reflectivity data clearly improves precipitation location in the analysis and has a positive impact on the forecast for several hours following the analysis. The influence of different update rates on the noise in terms of surface pressure tendencies and on the forecast quality in general are investigated. For a period of seven consecutive days the results are compared to those of DWD’s current operational radar assimilation scheme based on the latent heat nudging. |
Responsible Party
| Creator: | Theresa Bick (Author) |
| Publisher: | CRC/TR32 Database (TR32DB) |
| Publication Year: | 2015 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | C6 |
| Subjects: | Keywords: Data Assimilation, Radar, COSMO |
File Details
| Filename: | tbick_report5_2015.pdf |
| Data Type: | Text - Text |
| File Size: | 34.5 MB |
| Date: | Available: 11.09.2015 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | According to the TR32DB data policy agreement. |
| Access Limitations: | According to the TR32DB data policy agreement. |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Report
| Report Date: | 11th of September, 2015 |
| Report Type: | PhD Report |
| Report City: | Bonn |
| Report Institution: | Meteorologisches Institut, Universität Bonn |
Metadata Details
| Metadata Creator: | Theresa Bick |
| Metadata Created: | 18.09.2015 |
| Metadata Last Updated: | 18.09.2015 |
| Subproject: | C6 |
| Funding Phase: | 3 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 697 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 6 |
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