Some Characteristics of Turbulence in Katabatic Winds over Mizuho Plateau, East Antarctica (Special Issue of the Proceedings of the First Symposium on Antarctic Meteorology and Glaciology)

Abstract

Wind turbulence was observed, using sonic anemometers, on a snow surface at Mizuho Station (2230 m above sea level, Lat. 70°41.9'S, Long. 44°19.9'E) and on a bare ice field near the Yamato Mountains (1700 m above sea level, Lat. 71°18'S, Long. 35゜40'E) in the Mizuho Plateau in 1973 by the party of the 14th Japanese Antarctic Research Expedition (JARE-14). Observations revealed, as to katabatic winds blowing above the two places, that the one above the latter is characterized by the presence of a hydraulic jump generated by nunataks there, resulting in a stronger turbulence than the one above the former which is stationary. Hence, a comparison is made in this paper between characteristics of turbulence and a hydraulic jump in a katabatic wind