| QU Weizheng,HUANG Fei,ZHAO Jinping,YANG Liang,HE Hui,DENG Shenggui,CAO Yong. 2005. Arctic oscillation and the antarcic oscillation modes in the atmospheric stratosphere. Acta Oceanologica Sinica, (6):46－53 |
| Arctic oscillation and the antarcic oscillation modes in the atmospheric stratosphere |
| Arctic oscillation and the antarcic oscillation modes in the atmospheric stratosphere |
| Received:July 01, 2005 Revised:October 18, 2005 |
| DOI： |
| Key words:solar activity arctic oscillation antarctic oscillation stratosphere |
| 中文关键词: solar activity arctic oscillation antarctic oscillation stratosphere |
| 基金项目: |
| Author Name | Affiliation | E-mail | | QU Weizheng | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | quweizhe@ouc.edu.cn | | HUANG Fei | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | ZHAO Jinping | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | YANG Liang | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | HE Hui | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | DENG Shenggui | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | | | CAO Yong | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China | |
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| Abstract: |
| On the basis of the EOF analysis of global geopotential height anomaly (GHA) field at 10 hPa level, the arctic oscillation (AO) and the means antarctic oscillation (AAO) can be detected more obviously at the upper level of atmosphere than the AO or the AAO in surface layer. Unlike the hemisphere pattern of the AO and the AAO in the surface lager given by previous authors, the AO or the AAO in the stratosphere has its global features. The zonal oscillations-the Southern Oscillation (SO) and the north oscillation (NO) in atmospheric surface layer become less clear in the upper air. The first mode (AO mode, abbreviated to AOM hereafter) and the second mode (AAO mode, abbreviated to AAOM hereafter) respectively have 41.47% and 27.04% of the total variance contribution. The cumulative variance contribution of the first two modes reaches 68.51%. These two modes are the main components for the interdecadal or decadal oscillation in the stratosphere. In addition, there still exist two kinds of oscillation patterns with less probability,namely, the symmetric pattern at mid-high latitudes in the Southern Hemisphere and the asymmetric pattern. Spectral analysis shows that the AOM and the AAOM all have a spectral peak for 22 a period, being consistent with the periodic variations of the solar magnetic field, and a peak for 11 a period, being consistent with the period of the numbers of sunspots. Step filter analysis shows that the influencing factor for the upper atmospheric oscillation is the solar activity. The fluctuation of the solar magnetic field is the more influencing factor than the variation of the sunspot number. |
| 中文摘要: |
| On the basis of the EOF analysis of global geopotential height anomaly (GHA) field at 10 hPa level, the arctic oscillation (AO) and the means antarctic oscillation (AAO) can be detected more obviously at the upper level of atmosphere than the AO or the AAO in surface layer. Unlike the hemisphere pattern of the AO and the AAO in the surface lager given by previous authors, the AO or the AAO in the stratosphere has its global features. The zonal oscillations-the Southern Oscillation (SO) and the north oscillation (NO) in atmospheric surface layer become less clear in the upper air. The first mode (AO mode, abbreviated to AOM hereafter) and the second mode (AAO mode, abbreviated to AAOM hereafter) respectively have 41.47% and 27.04% of the total variance contribution. The cumulative variance contribution of the first two modes reaches 68.51%. These two modes are the main components for the interdecadal or decadal oscillation in the stratosphere. In addition, there still exist two kinds of oscillation patterns with less probability,namely, the symmetric pattern at mid-high latitudes in the Southern Hemisphere and the asymmetric pattern. Spectral analysis shows that the AOM and the AAOM all have a spectral peak for 22 a period, being consistent with the periodic variations of the solar magnetic field, and a peak for 11 a period, being consistent with the period of the numbers of sunspots. Step filter analysis shows that the influencing factor for the upper atmospheric oscillation is the solar activity. The fluctuation of the solar magnetic field is the more influencing factor than the variation of the sunspot number. |
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