Modification of gradient winds by dissected topography in the vicinity of the Jonkershoek Valley

The pilot balloon runs and synoptic charts show that mountain and valley winds at the Jonkershoek valley correspond with the west to east ridging of anticyclones over the South Western Cape. Saddles between the South Atlantic and South Indian anticyclones are particularly conducive to the development of well established local wind circulations at Jonkershoek. Gradient winds during the occurrence of saddles are shown to be light and variable. Deep gradient southeasterlies undergo an acceleration to the lee of the ridges resulting in strong airflow at the Jonkershoek valley bottom. The topography at Jonkershoek is shown not have any meaningful modifying effect on the gradient northwesterlies.

Grantor dc:publisher.institution

Department of Environmental and Geographical Science

Year dc:date.issued

1993

Author dc:creator

• Ngeleza, Eric B

Advisor dc:contributor.advisor

• Washington, R

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/13420

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/13420