Contrasting the flow patterns in the equatorial pacific between two types of El Niño

Li Chiao Wang, Chau Ron Wu

    研究成果: 雜誌貢獻期刊論文同行評審

    7 引文 斯高帕斯(Scopus)

    摘要

    Outputs based on the National Centers for Environmental Prediction (NCEP) Global Ocean Data Assimilation System (GODAS) are adopted to contrast the current variations in the equatorial Pacific between two types of El Niño. The model fully resolves the equatorial currents. We found that the central Pacific El Niño (CP-El Niño) corresponds well with previous El Niño studies in that both the eastward Equatorial Undercurrent (EUC) and westward South Equatorial Current (SEC) weaken. On the other hand, the eastern Pacific El Niño (EP-El Niño) displays a distinct circulation pattern. The North Equatorial Countercurrent (NECC) strengthens in the developing phase and persists into the peak of the warm event, whereas the northern branch of the SEC (SECn) also intensifies during the mature phase and lasts for about six months. The South Equatorial Countercurrent (SECC) strengthens during the decaying phase of the EP-El Niño. The shifting of the wind stress curl associated with the thermocline variability is chiefly responsible for the unique current performance of the EP-El Niño. It is worth noting that the air-sea interaction plays an important role in the current variability not only during a CP-El Niño but also during an EP-El Niño.

    原文英語
    頁(從 - 到)60-74
    頁數15
    期刊Atmosphere - Ocean
    51
    發行號1
    DOIs
    出版狀態已發佈 - 2013

    ASJC Scopus subject areas

    • Oceanography
    • Atmospheric Science

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