Cyclone formation development in the Antarctic Prydz Bay

Using meteorological data of field observation in 1989~2000,especially polar orbit high-resolution NOAA satellite cloud maps received from the Antarctic expedition vessel since 1997,the for mation and development of the Prydz Bay cyclone are studied.Some new view points are suggested such as:when surround-polar cyclone enters the Prydz Bay,it can also intensify and develop in summer;cyclone can also develop in the easterlies in this bay.These view points revise old incomplete view-point that the Prydz Bay is a burial ground of cyclone,and also further consummate formation-development theory of surround-cyclone in the Antarctic westerlies and cy clone in the A ntarctic easterlies.The mechanism of ice-ai-rsea interaction in the Prydz Bay is studied,and the physical process of cyclone formation-development is explained.By use of wholly dynamic transportation method,an energy exchange case of a cyclone,which explosively developed after entering the Prydz Bay,is calculatee.It is pointed that when cyclone passes through ice dam and enters the Polynya,it can obtain a great number of heat energy and develop rapidly into a very strong cyclone with Antarctic feature.In this case wind force was as strong as 12 grade,with 10 min average wind speed of 38 m/s,and instant aneous wind speed of 100 m/s.