Atlantic impacts on subdecadal warming over the tropical Pacific in the 2000s

Takashi Mochizuki, Masahiro Watanabe

研究成果: ジャーナルへの寄稿学術誌査読


Introduction: A subdecadal (i.e., three-year running mean) variation over the tropical Pacific is very distinctively observed in the 2000s. Results and methods: Here, we have demonstrated that sea surface temperature (SST) anomalies in the tropical Atlantic contribute to forming high ocean-temperature anomalies in the tropical Pacific in the early 2000s by performing partial data assimilation of a global climate model. Low SSTs over the equatorial Atlantic change the Walker circulation, and the associated weakening of the Pacific trade winds raises the equatorial SST on subdecadal timescales. At the same time, a high SST anomaly is also generated in the off-equatorial North Pacific through deepening of the upper ocean thermocline due to an accompanying anticyclonic surface wind anomaly aloft. While the subtropical North Atlantic SSTs may help the subdecadal warming in the equatorial Pacific, the resultant SST anomalies show a one-year delay in the phase transition and are modestly accompanied by ocean thermocline deepening. Discussion: It roughly follows the IMRaD format.

ジャーナルFrontiers in Climate
出版ステータス出版済み - 11月 22 2022

!!!All Science Journal Classification (ASJC) codes

  • 地球変動および惑星変動
  • 環境科学(その他)
  • 汚染
  • 大気科学
  • マネジメント、モニタリング、政策と法律


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