1st PhD Report: High-resolution radar data assimilation using the LETKF
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| Titles: | Main Title: 1st PhD Report: High-resolution radar data assimilation using the LETKF Subtitle: - |
| Description: | Abstract: The prediction of convective events is a dicult task due to the nonlinear and chaotic behaviour of the atmosphere on this scale. Observation-based nowcasting methods are useful for very short-range forecasts, but after a lead time of approximately 2 hours, uncertainties become too large. Another approach of forecasting is given by numerical weather prediction (NWP) models. NWP forecasts are, mathematically speaking, an initial value problem. For an intial state given on the 3-dimensional discrete model grid, a forecast can be obtained by the forward integration of the set of (typically nonlinear) model equations describing the dynamics of the atmosphere. However, since the number of observations available is typically much smaller than the dimension of the model state vector, this intial value problem is extremely underdetermined. Data assimilation alleviates this problem by the use of additional information, for example given by error statististics of both model and observations. Thus, a possible enhancement of short-term model forecasts of high-impact weather events could be given by the assimilation of 3 dimensional radar reflectivity data. In this report, the plans for this PhD project will be introduced and discussed in more detail. |
Responsible Party
| Creator: | Theresa Bick (Author) |
| Publisher: | CRC/TR32 Database (TR32DB) |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Remote Sensing |
| Related Subproject: | C6 |
| Subjects: | Keywords: Data Assimilation, Atmosphere |
File Details
| Filename: | report1_tbick_2013.pdf |
| Data Type: | Text - Text |
| File Size: | 962 KB |
| Date: | Available: 14.06.2013 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
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| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Report
| Report Date: | 14th of June, 2013 |
| Report Type: | PhD Report |
| Report City: | Bonn, Germany |
| Report Institution: | Meteorological Institute, University Bonn |
| Number of Pages: | 9 (1 - 9) |
| Further Information: | TR32 Student Report Phase II |
Metadata Details
| Metadata Creator: | Theresa Bick |
| Metadata Created: | 06.12.2013 |
| Metadata Last Updated: | 06.12.2013 |
| Subproject: | C6 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 613 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 3 |
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