| Xie Simei,Mei Shan,Liu Kewei,Wei Lixin. 2002. Cyclone formation and development in the Antarctic Prydz Bay. Acta Oceanologica Sinica, (1):45－54 |
| Cyclone formation and development in the Antarctic Prydz Bay |
| Cyclone formation and development in the Antarctic Prydz Bay |
| Received:December 21, 2001 Revised:January 24, 2002 |
| DOI： |
| Key words:The Prydz Bay Antarctic cyclone ice-air-sea interaction |
| 中文关键词: The Prydz Bay Antarctic cyclone ice-air-sea interaction |
| 基金项目:This study was supported by the National Antarctic Principal Project in the "Ninth Five-Year Plan" of the State under contract No.98927-01; National Natural Science Foundation Project under contract No.49776280. |
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| Abstract: |
| Using meteorological data of field observation in 1990-2000,especially polar orbit highresolution NOAA satellite cloud maps received from the Antarctic expedition vessel since 1997,the formation and development of the Prydz Bay cyclone are studied in this paper.Some new viewpoints 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 uncomplete 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 cyclone in the Antarctic easterlies.In this paper,the mechanism of ice-air-sea 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 calcu caculated.In the open water area,momentum flux is-2.205 N/m2.sensible heat flux is 486.69 W/m2,and latent heat flux is 261.84 W/m2.It is larger than values of westerlies burst over the Pacific.The heat transferred from ocean to atmosphere in form of sensible and latent heat promotes cyclone development rapidly.In this case wind force was as strong as 12 grade,with 10 minutes average wind speed of 38 m/s,and instantaneous wind speed of 100 m/s which broke the wind speed record of 96 m/s in the Antarctic (Wendler and Kodama). |
| 中文摘要: |
| Using meteorological data of field observation in 1990-2000,especially polar orbit highresolution NOAA satellite cloud maps received from the Antarctic expedition vessel since 1997,the formation and development of the Prydz Bay cyclone are studied in this paper.Some new viewpoints 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 uncomplete 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 cyclone in the Antarctic easterlies.In this paper,the mechanism of ice-air-sea 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 calcu caculated.In the open water area,momentum flux is-2.205 N/m2.sensible heat flux is 486.69 W/m2,and latent heat flux is 261.84 W/m2.It is larger than values of westerlies burst over the Pacific.The heat transferred from ocean to atmosphere in form of sensible and latent heat promotes cyclone development rapidly.In this case wind force was as strong as 12 grade,with 10 minutes average wind speed of 38 m/s,and instantaneous wind speed of 100 m/s which broke the wind speed record of 96 m/s in the Antarctic (Wendler and Kodama). |
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