Impact of land cover changes on the South African climate
Ngwana, T. I., Demory, M.-E., Vidale, P. L., Plant, R. S. and Mbedzi, M. P. (2010) Impact of land cover changes on the South African climate. IOP Conference Series: Earth and Environmental Science, 13 (1). 012009. ISSN 1755-1315
Full text not archived in this repository.
To link to this article DOI: 10.1088/1755-1315/13/1/012009
The Joint UK Land Environmental Simulator (JULES) was run offline to investigate the sensitivity of land surface type changes over South Africa. Sensitivity tests were made in idealised experiments where the actual land surface cover is replaced by a single homogeneous surface type. The vegetation surface types on which some of the experiments were made are static. Experimental tests were evaluated against the control. The model results show among others that the change of the surface cover results in changes of other variables such as soil moisture, albedo, net radiation and etc. These changes are also visible in the spin up process. The model shows different surfaces spinning up at different cycles. Because JULES is the land surface model of Unified Model, the results could be more physically meaningful if it is coupled to the Unified Model.
Best M 2005 JULES Technical Documentation (UK Met Office, Fitzroy, Exeter, UK) Beljaars ACM 1994 Parameterisation of Surface fluxes in large-scale models under free convection Quart.J.R.Meterol.Soc. 121 255-277 Charney, JG 1975 Dynamics of desert and drought in the Sahel Quart.J.R.Meteor.Soc. 101 193-202 Cox, PM, RA Betts, CB Bunton, R L H Essery, PR Rowntree and J Smith 1999 The impact of new land surface physics on the GCM simulation of climate and climate sensitivity Climate Dynamics 15 183-203 Essery, RLH, MJ Best, RA Betts, Cox, PM and Taylor, CM 2003 Explicit Representation of Subgrid Heterogeneity in a GCM Land-Surface Scheme J Hydrometer. 5 30-543 Lobocki, LM 2001 Calculation of Surface Fluxes under Convective Conditions by Turbulence Closure Models Amer Met Soci. 40 604-621 Low, SB and AG Rebelo 1996 Vegetation of South Africa, Lesotho and Swaziland (Department of Environmental Affairs and Tourism, Pretoria) Riphagen HA, Bruyere, CL, WJordaan, Poolman, ER and Gertenbach, JD 2002 Experiments with the NCEP Regional Eta Model at the South Africa Weather Bereau, with Emphasis on Terrain Representation and Its Effect on Precipitation Predictions Mon Wea Rev 130 1246-1263 Shaw, WJ and Doran 2001 Observations of systematic boundary layer divergence patterns and thear relationship to land use and topography J. Climate 14 1753-1764 Sun J and Mahrt L 1994 Determination of surface Fluxes from the surface Radiative Temperature J. Atmos. Sci. 52(8) Van Heerden, J, DE Terblanche and GC Shulze 1988 The Southern Oscillation and South African summer rainfall J.Climatol. 8 577-597 Wei, H and C Fu 1998 Study of the sensitivity of a regional model in response to land cover change over northern China Hydrol. Process. 12 2249-2265