Two different features of discharge of equatorial upper ocean heat content related to El Niño events

Takuya Hasegawa, Takanori Horii, Kimio Hanawa

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Oceanic and atmospheric anomaly fields in the tropical Pacific are investigated to extract some characteristics from twelve El Niño events in the past 49 years. The results show that entire equatorial upper ocean heat content (Teq) is discharged after the mature phase of seven El Niño events (A-type events), while Teq is not well discharged in other five events (B-type events). Furthermore, A-type events generally have larger amplitudes of tropical oceanic and atmospheric anomalies than B-type events. In addition, the durations of A-type events are longer than those of B-type events. It is also found that A-type events accompany large positive wind stress curl anomaly and resultant poleward Sverdrup transport in the tropical South Pacific after the mature phase of El Niño events, while B-type events do not. This appearance of large positive wind stress anomaly should be one of the reasons why Teq is well discharged in A-type events.

本文言語English
論文番号L02609
ジャーナルGeophysical Research Letters
33
2
DOI
出版ステータスPublished - 2006 1 28

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

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