海面水温上昇による台風の発達の変化

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  • Changing in Development of Typhoon with Rising Sea Surface Temperature
  • カイメン スイオン ジョウショウ ニ ヨル タイフウ ノ ハッタツ ノ ヘンカ

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In this study, relationships between development of typhoon and rising of the sea surface temperature (SST) in the north west Pacific Ocean are investigated. Further the characteristics difference in typhoon associated with El Nino and La Nina phenomena is also investigated. The average of global SST has risen by 0.55 ℃ in past 100 years. In the northwest Pacific Ocean including Japan area, it was 1.8 ℃/100 years rise during resent 28 years (1986-2013). The total number of typhoons tends to be small and the strength of typhoons tends to become weak during this recent period. Average generation positions of typhoons during this period have been moving to the west and the north in the Pacific Ocean. It is found that events of equatorial SST, such as El Nino or La Niña phenomena, seriously affect characteristics of typhoon.

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