Fog precipitation on table mountain

✍ Scribed by J. F. Nagel

• Book ID: 104571934
• Publisher: John Wiley and Sons
• Year: 1956
• Tongue: English
• Weight: 573 KB
• Volume: 82
• Category: Article
• ISSN: 0035-9009
• DOI: 10.1002/qj.49708235408

✦ Synopsis

Abstract

Fog precipitation on Table Mountain has been measured over a period of one year by means of two raingauges, one of which was equipped with a fog‐catcher. The evaluation of the records is complicated by the uncertainty of the fog precipitation during rain and drizzle. It is shown that satisfactory results can be obtained if at least two sets of instruments are installed on the mountain, one of them in the middle of the plateau and the other some 200 m lower.

The fog precipitation for the year on the plateau was found to be 3,294 mmandthe rainfallto be 1,940 mm. The mean intensity of rainfall was 1.84 mm/hr and that of fog precipitation 3.75 mm/hr. Although the latter appears to be rather high, it is much lower than the value obtained theoretically. T h e discrepancy is accounted for by several errors in the measurements, which are discussed, and by fog precipitation supposed to occur on the slopes, which causes the air to reach the plateau with a smaller liquid‐water content than calculation indicates.