Dynamics of upwelling annual cycle in the equatorial Atlantic Ocean

Li Chiao Wang, Fei Fei Jin*, Chau Ron Wu, Huang Hsiung Hsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The annual upwelling is an important component of the equatorial Atlantic annual cycle. A simple theory is proposed using the framework of Zebiak-Cane (ZC) ocean model for insights into the dynamics of the upwelling annual cycle. It is demonstrated that in the Atlantic equatorial region this upwelling is dominated by Ekman processing in the west, whereas in the east it is primarily owing to shoaling and deepening of the thermocline resulting from equatorial mass meridional recharge/discharge and zonal redistribution processes associated with wind-driven equatorial ocean waves. This wind-driven wave upwelling plays an important role in the development of the annual cycle in the sea surface temperature of the cold tongue in the eastern equatorial Atlantic.

Original languageEnglish
Pages (from-to)3737-3743
Number of pages7
JournalGeophysical Research Letters
Issue number8
Publication statusPublished - 2017 Apr 28


  • Ekman pumping
  • Zebiak-Cane model
  • annual cycle
  • equatorial upwelling
  • recharge oscillator

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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