| ZONALLY SYMMETRICAL EKMAN-CISK MECHANISM AND 30—60-DAY LOW FREQUENCY OSCILLATION NEAR THE EQUATOR |
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| 引用本文： | 薛洪斌,钟中,薛峰.ZONALLY SYMMETRICAL EKMAN-CISK MECHANISM AND 30—60-DAY LOW FREQUENCY OSCILLATION NEAR THE EQUATOR[J].Acta Meteorologica Sinica,2002(4). |
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| 作者姓名： | 薛洪斌 钟中 薛峰 |
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| 作者单位： | Institute of Meteorology PLA Science and Technology University，Nanjing 211101，Department of Atmospheric Sciences，Nanjing University，Nanjing 210093，LASG.Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029 |
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| 基金项目： | This study was supported jointly by Chinese Academy of Sciences Key Project under Contract KZCX2-203 and National Natural Science Foundation of China under Grants 40125014 and 49805004. |
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| 摘 要： | Based on the baroclinic semi-geostrophic model,the effects of zonally symmetrical Ekman-CISK mechanism on the characteristics of 30—60-day low frequency oscillation(LFO)near theequator are investigated.It is found that the theoretical results are in good agreement with theobservational features of LFO.Besides,the planetary-scale LFO with the period of 30—60 d couldbe triggered by the Ekman-CISK mechanism,and the growth rate of perturbation with wavenumber 1 is in order of O (10~(-6)s~(-1)).The zonal propagation of LFO and the correspondinglongitudinal-height structure of physical quantities are also discussed in detail.
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