Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Simulations of moist convection using the quasi-elastic equations
Thesis (PhD)--University of Pretoria, 2013.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | Eng |
| Published: |
University of Pretoria
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613725837492224 |
|---|---|
| access_status_str | Open Access |
| author2 | Landman, Willem Adolf |
| author_browse | Landman, Willem Adolf |
| author_facet | Landman, Willem Adolf |
| 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 | Thesis (PhD)--University of Pretoria, 2013. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/32962 |
| institution | University of Pretoria (South Africa) |
| language | Eng |
| last_indexed | 2026-06-10T12:40:43.223Z |
| 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:2263/32962 Simulations of moist convection using the quasi-elastic equations Landman, Willem Adolf mbopape@csir.co.za Randall, D.A. Engelbrecht, Francois Alwyn Bopape, Mary-Jane Morongwa Moist convection Simulation of clouds UCTD Thesis (PhD)--University of Pretoria, 2013. Cloud Resolving Models use microphysics parameterisation schemes for the simulation of clouds. The thesis reports on the introduction of two single-moment Bulk Microphysics Parameterisation (BMP) schemes in the Nonhydrostatic - coordinate Model (NSM). The rst BMP is known as the PURDUE-LIN scheme, and can be used with ve (excluding graupel) or six (including graupel) classes of the water substance. The second scheme was developed using the PURDUELIN scheme as a starting point, and is known as SBU-YLIN. Graupel and snow share a category and processes in the latter scheme. Simulations of two hours in length are made, with convection initiated through inserting a warm thermal into a cooler environment, using a six-class and ve-class PURDUE-LIN and the SBU-YLIN BMPs. The simulations are performed at various horizontal resolutions of 500 m, 1 km and 2 km. The six-class PURDUE-LIN scheme simulates more rainfall than the ve-class PURDUE-LIN and the SBU-YLIN schemes. The SBU-YLIN scheme generally rains the least, looses the least water vapour to hydrometeors and warms up the least. The PURDUE-LIN schemes simulate two convective cells in a no shear environment. The maximum updrafts associated with the rst cell (triggered by the warm perturbation) are similar in all the simulations. The second cell is triggered by a cold pool. While the cold pool is stronger in the six-class PURDUE-LIN scheme simulations, the updrafts in the second cell are stronger in the ve-class PURDUE-LIN simulation. The SBU-YLIN scheme generally simulates just one cell because of a weak cold pool. Simulations were also made for three di erent periods dominated by suppressed convection with deep convection at the beginning and end of the three periods, forced with large scale tendencies observed during the Tropical Ocean Global Atmosphere Coupled Ocean Atmosphere Response Experiment (TOGA COARE). The NSM is able to capture di erences in the suppressed and deep convection periods. Qualitatively, the simulations provide new insight into the interplay between cloud microphysics and cloud dynamics, and points out the potential for better describing the uncertainty range associated with projections of future climate change, through the improvement and stochastic application of cloud microphysics schemes. gm2013 Geography, Geoinformatics and Meteorology unrestricted 2014-01-09T11:15:44Z 2014-01-09T11:15:44Z 2013-09-06 2013 Thesis Bopape, M.M. 2013, Simulations of moist convection using the quasi-elastic equations, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/32962> D13/9/884/gm http://hdl.handle.net/2263/32962 Eng © 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 | Moist convection Simulation of clouds UCTD Simulations of moist convection using the quasi-elastic equations |
| title | Simulations of moist convection using the quasi-elastic equations |
| title_full | Simulations of moist convection using the quasi-elastic equations |
| title_fullStr | Simulations of moist convection using the quasi-elastic equations |
| title_full_unstemmed | Simulations of moist convection using the quasi-elastic equations |
| title_short | Simulations of moist convection using the quasi-elastic equations |
| title_sort | simulations of moist convection using the quasi elastic equations |
| topic | Moist convection Simulation of clouds UCTD |
| url | http://hdl.handle.net/2263/32962 |