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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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