| ENSO and Indian Ocean dipole mode in three coupled GCMs |
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| 作者姓名： | YU Yongqiang LIU Xiying |
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| 作者单位： | LASG,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,China |
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| 基金项目： | 国家自然科学基金，the National Key Science Project of China under contract |
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| 摘 要： | The simulated ENSO and Indian Ocean dipole (IOD) mode events from three coupled GCMs with the same oceanic component model, CPMO, CPM1 and FGCMO, are compared. The only difference between the CPMO and the CPM 1 comes from the coupling scheme at the air-sea interface, e.g., flux anomaly coupling scheme for the former and direct coupling scheme for the latter. The FGCMO is also a directly coupled GCM, but its atmospheric component model is the NCAR CCM3 rather than the NCC T63AGCM as in the other two coupled GCMs CPMO and CPM1. All three coupled models show E1Nifio-like interannual variability in the tropic Pacific, but the FGCMO shows a bit stronger amplitude of E1 Nifio events and both the CPMO and the CPM1 show much weaker amplitude than the observed one. In the meanwhile, the quasi-biennial variability dominates in the FGCMO simulations, and 4 a and longer periods are significant in both the CPMO and CPM 1 models. As the E1 Nifio events simulated by the three coupled GCMs, the simulated Indian Ocean dipole mode events are stronger from the coupled model FGCMO and weaker from both the CPMO and CPM1 models than those from observation.
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| 关 键 词： | ENSO 印度洋 对称振子振荡模 海洋成分 耦合模型 |
| 收稿时间： | 2004/1/11 0:00:00 |
| 修稿时间： | 2004/6/20 0:00:00 |
ENSO and Indian Ocean dipole mode in three coupled GCMs |
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| YU Yongqiang,LIU Xiying.ENSO and Indian Ocean dipole mode in three coupled GCMs[J].Acta Oceanologica Sinica,2004,23(4):581-595. |
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| Authors: | YU Yongqiang and LIU Xiying |
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| Affiliation: | LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | The simulated ENSO and Indian Ocean dipole (IOD) mode events from three coupled GCMs with the same oceaniccomponent model, CPM0, CPM1 and FGCM0, are compared. The only difference between the CPM0 and theCPM1 comes from the coupling scheme at the airsea interface, e.g., flux anomaly coupling scheme for the former anddirect coupling scheme for the latter. The FGCM0 is also a directly coupled GCM, but its atmospheric componentmodel is the NCAR CCM3 rather than the NCC T63AGCM as in the other two coupled GCMs CPM0 and CPM1.All three coupled models show El Nio-like interannual variability in the tropic Pacific, but the FGCM0 shows a bitstronger amplitude of El Nio events and both the CPM0 and the CPM1 show much weaker amplitude than theobserved one. In the meanwhile, the quasi-biennial variability dominates in the FGCM0 simulations, and 4 a andlonger periods are significant in both the CPM0 and CPM1 models. As the El Nio events simulated by the threecoupled GCMs, the simulated Indian Ocean dipole mode events are stronger from the coupled model FGCM0 andweaker from both the CPM0 and CPM1 models than those from observation. |
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| Keywords: | ENSO Indian Ocean dipole coupled models |
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