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第 75 回 大気海洋物理系 B 棟コロキウム のおしらせ

日　時：2000年 7月 12日(水) 午後 16:30 〜 18:30
場　所：地球環境科学研究科 C104

発表者：Saji N. Hameed (地球フロンティア研究システム気候変動予測研究領域)
題　目：An ENSO-less world - how the fluctuations in equatorial Indian

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An ENSO-less world - how the fluctuations in equatorial Indian (Saji N. Hameed) 発表要旨 :

 It must be difficult to imagine a world without ENSO. However, exploiting 
 certain statistical relations, we can mathematically construct such a 
 world.  For this talk I used linear regression to filter out ENSO from the 
 world climate. Besides other things this gives us an idea of the locations 
 where ENSO affects climate most. In this ENSO-less world, I will 
 statistically perturb the Walker circulation in the equatorial Indian 
 Ocean. This exercise leads to very interesting results. Especially 
 noteworthy is the SST variability in the North Pacific off the coast of 
 Japan. It appears that Walker Circulation changes in the equatorial Indian 
 Ocean is associated with about 20% to 30% of the SST variability in this 
 region. The associated atmospheric circulation changes will also be 
 presented. The first impression is that of extratropical teleconnections 
 fuelled by perturbation of the convective heat source in the equatorial 
 Indian Ocean.  Significant variability in the Jet stream trajectories at 
 the jet exit regions of the Pacific and Atlantic oceans are noted. I would 
 like to discuss these results with you and benefit from your comments and 
 suggestions.  This presentation is based solely upon analysis of observed 
 and reanalysis data sets. 
  

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