The Relationship of Polar Vortex at 10 hPa in the Southern Hemisphere with Ozone and Antarctic Oscillation
A set of circulation indices are defined to characterize the polar vortex at 10 hPa in the Southern Hemisphere. The intensity interarmuai anomalies and its possible causes of 10 hPa polar vortex in the Southern Hemisphere are mainly analyzed by using the intensity index, the relationship between 10 hPa polar vortex strength and the Antarctic Oscillation are analyzed as well. The results show that: (1) Intensity and area index of anticyclone (cyclone) in Jan. (Jul.) show a significant spike in the late 1970’s, the anticyclone (cyclone) enhances (weakens) from extremely weak (strong) oscillation to near the climatic mean before a spike, anticyclone tends to the mean state from very strong oscillation and cyclone oscillates in the weaker state after the spike. (2) The ozone anomalies can cause the interannual anomaly of the polar anticyclone at 10 hPa in the Southern Hemisphere in Jan, but it is not related to the polar cyclone anomalies. (3) There is notable negative correlation between the polar vortex intensity index P and the Antarctic Oscillation index (AAOI), thus AAOI can be represented by P.
circulation indices of polar vortex at 10 hPa interannual anomaly ozone anomaly Antarctic Oscillation
LiPing Li JuHui Ma PanXing Wang Dong Guo Mingken Duan ShuXuan Guan
Ministry of Education Key Laboratory of Meteorological Disaster of Cooperation of Ministries and Provincial Governments, and College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044,China
国际会议
南京
英文
156-160
2010-05-08（万方平台首次上网日期，不代表论文的发表时间）