| ANTARCTIC SEA ICE AND THE POLAR VORTEX INDEX:TEMPORAL AND SPATIAL CHARACTERISTICS AND THEIR RELATIONSHIP |
| |
| 作者姓名： | 卞林根 陆龙骅 贾朋群 |
| |
| 作者单位： | Chinese Academy of Meteorological Sciences Beijing 100081，Chinese Academy of Meteorological Sciences，Beijing 100081，Chinese Academy of Meteorological Sciences，Beijing 100081 |
| |
| 基金项目： | This work is supported by National Antarctic Key Project of China(85-905-02). |
| |
| 摘 要： | The cluster analysis method has been used to divide the Antarctic sea ice variation field into 5 sectors.Then,foreach of these sectors,the corresponding indexes of vortex area and vortex intensity on the 500 hPa level have been calcu-lated.These data were used to analyse the temporal and spatial characteristics of both Antarctic sea ice and the vortexindex variations and their relationship.Our results show that substantial differences are presented in the climatic patternand interannual variations of the sea ice data and vortex index in different sectors.The maximum sea ice extent varia-tions appear in sector 1 and sector 4.Oscillation periods of 2—2.5 and 5—7 years exist in the variations of sea ice extentand vortex index in most sectors.A positive trend is only found in sector 1 sea ice extent while the other sectors shownegative trends.The average extent of the Antarctic sea ice as a whole has retreated at a rate of 1.6 latitudes per 100years.The vortex areas for all sectors have decreased.Nevertheless,the vortex intensities in 3 sectors have increased.Therelationship between sea ice and vortex characters in each sector is obvious,but a little complex.Sectors 1 and 5,whichare located in the Southeast Pacific and South Atlantic,are the most sensitive areas in terms of sea ice/atmosphereinteraction.
|
ANTARCTIC SEA ICE AND THE POLAR VORTEX INDEX:TEMPORAL AND SPATIAL CHARACTERISTICS AND THEIR RELATIONSHIP |
| |
| Bian Lingen Lu Longhua Jia Pengqun Chinese Academy of Meteorological Sciences,Beijing.ANTARCTIC SEA ICE AND THE POLAR VORTEX INDEX:TEMPORAL AND SPATIAL CHARACTERISTICS AND THEIR RELATIONSHIP[J].Acta Meteorologica Sinica,1995(1). |
| |
| Authors: | Bian Lingen Lu Longhua Jia Pengqun Chinese Academy of Meteorological Sciences Beijing |
| |
| Institution: | Bian Lingen Lu Longhua Jia Pengqun Chinese Academy of Meteorological Sciences,Beijing 100081 |
| |
| Abstract: | |
| |
| Keywords: | Antarctic sea ice polar vortex temporal and spatial features the Southern Hemisphere |
| 本文献已被 CNKI 等数据库收录！ |
