| Sensitivity Difference in the Extratropical Atmosphere to Two Types of El Nio Events |
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| 作者姓名： | FU Jian-Jian ZHANG Ming-Hong HAN Zhe LI Shuanglin |
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| 作者单位： | Nansen-Zhu International Research Centre,Institute of Atmospheric Physics, Chinese Academy of Sciences;Graduate University of Chinese Academy of Sciences |
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| 基金项目： | supported by the National Natural Science Foundation of China(41205048);the National Basic Research Program of China,“Structures,Variability and Climatic Impacts of Ocean Circulation and Warm Pool in the Tropical Pacific Ocean"(2012CB417403);the Special Project of Chinese Academy of Sciences(XDA11010401) |
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| 摘 要： | A comparison of sensitivity in extratropical circulation in the Northern Hemisphere(NH)and Southern Hemisphere(SH)is conducted through observational analyses and diagnostic linear model experiments for two types of El Nio events,the traditional El Nio with the strongest warmth in the eastern tropical Pacific(EP El Nio)and the El Nio Modoki with the strongest warmth in the central tropical Pacific(CP El Nio).It is shown that CP El Nio favors the occurrence of a negative-phase Northern Annular Mode(NAM),while EP El Nio favors that of the Pacific-North American(PNA)pattern.In SH,both EP and CP El Nio induce a negative phase Southern Annular Mode(SAM).However,the former has a greater amplitude,which is consistent with the stronger sea surface temperature(SST)warmth.The difference in the two types of El Nio events in NH may originate from the dependence of heating-induced extratropical response on the location of initial heating,which may be associated with activity of the stationary wave.In SH,the lack of sensitivity to the location of heating can be associated with weaker activity of the stationary wave therein.
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| 关 键 词： | El Nio Modoki El Nio Northern Annular Mode Pacific-North American Southern Annular Mode |
Sensitivity Difference in the Extratropical Atmosphere to Two Types of El Nio Events |
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| FU Jian-Jian,ZHANG Ming-Hong,HAN Zhe,LI Shuanglin.Sensitivity Difference in the Extratropical Atmosphere to Two Types of El Nio Events[J].Atmospheric and Oceanic Science Letters,2013(5):355-359. |
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| Authors: | FU Jian-Jian ZHANG Ming-Hong HAN Zhe LI Shuanglin |
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| Affiliation: | FU Jian-Jian;ZHANG Ming-Hong;HAN Zhe;LI Shuanglin;Nansen-Zhu International Research Centre,Institute of Atmospheric Physics, Chinese Academy of Sciences;Graduate University of Chinese Academy of Sciences; |
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