Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
The Verification of different model configurations of the Unified Atmospheric Model over South Africa
Dissertation (MSc)--University of Pretoria, 2013.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613497077006336 |
|---|---|
| access_status_str | Open Access |
| author2 | Rautenbach, C.J. de W. (Cornelis Johannes de Wet) |
| author_browse | Rautenbach, C.J. de W. (Cornelis Johannes de Wet) |
| author_facet | Rautenbach, C.J. de W. (Cornelis Johannes de Wet) |
| collection | Thesis |
| dc_rights_str_mv | © 2013 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2013. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/33168 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:05.077Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/33168 The Verification of different model configurations of the Unified Atmospheric Model over South Africa Rautenbach, C.J. de W. (Cornelis Johannes de Wet) Mahlobo, Dawn Duduzile South African Weather Service SAWS Unified Atmospheric Model Numerical Weather Prediction NWP UCTD Dissertation (MSc)--University of Pretoria, 2013. In 2006 a Numerical Weather Prediction (NWP) model known as the Unified Model (UM) from the United Kingdom Meteorological Office (UK Met Office) was installed at the South African Weather Service (SAWS). Since then it has been used operationally at SAWS, replacing the Eta model that was previously used. The research documented in this dissertation was inspired by the need to verify the performance of the UM in simulating and predicting weather over South Africa. To achieve this aim, three model configurations of the UM were compared against each other and against observations. Verification of rainfall as well as minimum and maximum temperature for the year 2008 was therefore done to achieve this. 2008 is the first year since installation, where all the configurations of the UM used in the study are present. For rainfall verification the model was subjectively verified using the eyeball verification for the entire domain of South Africa, followed by objective verification of categorical forecasts for rainfall regions grouped according to standardized monthly rainfall totals obtained by cluster analysis and finally objective verification using continuous variables for selected stations over South Africa. Minimum and maximum temperatures were subjectively verified using the eyeball verification for the entire domain of South Africa, followed by objective verification of continuous variables for selected stations over South Africa, grouped according to different heights above mean sea level (AMSL). Both the subjective and objective verification of the three model configurations of the UM (for both rainfall as well as the minimum and maximum temperatures) suggests that 12km UM simulation with DA gives better and reliable results than the 12km and 15km UM simulations without DA. It was further shown that although there was no significant difference between the model outputs from the 12km and the 15km UM without DA, the 15km UM simulation without DA, proved to me more reliable and accurate than the 12km UM simulation without DA in simulating minimum and maximum temperatures over South Africa, on the other hand the 12km UM simulation without DA is more reliable and accurate than the 15km UM simulation without DA in simulating rainfall over South Africa. gm2014 Geography, Geoinformatics and Meteorology unrestricted 2014-01-28T14:27:02Z 2014-01-28T14:27:02Z 2013-09-06 2013 Dissertation Mahlobo, DD 2013, The verification of different model configurations of the Unified Atmospheric Model over South Africa', MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/33168> E13/9/931/gm http://hdl.handle.net/2263/33168 en © 2013 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | South African Weather Service SAWS Unified Atmospheric Model Numerical Weather Prediction NWP UCTD The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title | The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title_full | The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title_fullStr | The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title_full_unstemmed | The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title_short | The Verification of different model configurations of the Unified Atmospheric Model over South Africa |
| title_sort | verification of different model configurations of the unified atmospheric model over south africa |
| topic | South African Weather Service SAWS Unified Atmospheric Model Numerical Weather Prediction NWP UCTD |
| url | http://hdl.handle.net/2263/33168 |