[774] - 1st PhD Report: High-resolution radar data assimilation using the LETKF

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Bick, T., 2013. 1st PhD Report: High-resolution radar data assimilation using the LETKF. PhD Report, Meteorological Institute, University Bonn, Bonn, Germany. Accessed from http://www.tr32db.uni-koeln.de/data.php?dataID=774 at 2019-04-25.
Title(s):Main Title: 1st PhD Report: High-resolution radar data assimilation using the LETKF
Subtitle: -
Description(s):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(s):Author: Theresa Bick
Publisher:CRC/TR32 Database (TR32DB)
TR32 Topic:Remote Sensing
Related Sub-project(s):C6
Subject(s):CRC/TR32 Keywords: Data Assimilation, Atmosphere
File Details
File Name:report1_tbick_2013.pdf
Data Type:Text
File Size:962 kB (0.939 MB)
Date(s):Available: 2013-06-14
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:None
Measurement Location:--None--
Specific Informations - 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
Period of Pages:1 - 9
Further Informations:TR32 Student Report Phase II
Metadata Details
Metadata Creator:Theresa Bick
Metadata Created:2013-12-06
Metadata Last Updated:2013-12-13
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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