| Long baroclinic Rossby waves with periods of about 500d near 20°N in the northwest Pacific Ocean |
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| 作者姓名： | CHEN Haiying QIAO Fangli FANG Guohong WANG Yonggang WEI Zexun |
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| 摘 要： |
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Long baroclinic Rossby waves with periods of about 500d near 20°N in the northwest Pacific Ocean |
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| CHEN Haiying,QIAO Fangli,FANG Guohong,WANG Yonggang,WEI Zexun.Long baroclinic Rossby waves with periods of about 500d near 20°N in the northwest Pacific Ocean[J].Acta Oceanologica Sinica,2006,25(3):1-10. |
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| Authors: | CHEN Haiying QIAO Fangli FANG Guohong WANG Yonggang WEI Zexun |
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| Abstract: | On the basis of maps of sea level anomalies data set from October 1992 to January 2004, pronounced low frequency variations with periods of about 500 d are detected in the area near 20°N from 160°W to 130°E. A linear two-layer model is employed to explain the mechanism. It is found that the first-mode long baroclinic Rossby waves at 20°N in the northwest Pacific propagate westward in the form of free waves at a speed of about 10.3 cm/s. This confirms that the observed low frequency variabilities appear as baroclinic Rossby waves. It further shows that these low frequency variabilities around 20°N in the northwest Pacific can potentially be predicted with a lead up to 900 d. |
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| Keywords: | low frequency oscillation Rossby waves maps of sea level anomalies northwest Pacific Ocean two-layer model |
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