Impacts of the central and eastern Pacific types of ENSOon sea surface temperature in the South Pacific |
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| Authors: | Gang Li Chongyin Li Yanke Tan Jing Pan |
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| Institution: | 1. Institute of Meteorology, PLA University of Science and Technology, Nanjing, 211101, China
2. LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
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| Abstract: | The present study examines the relationship between two types of El Niño–Southern Oscillation (ENSO), the central Pacific (CP) ENSO and the eastern Pacific (EP) ENSO, and the sea surface temperature (SST) variability over the South Pacific (SP) (20° S–60° S, 145° E–70° W) using NOAA OI SST for the period 1982–2006. The SP SST variability associated with the two types of ENSO varies with season. These two types of ENSO can excite different atmospheric patterns associated with the Pacific–South American mode, through which they influence the SP SST variability. Both the surface turbulent air–sea heat fluxes and the heat advection by Ekman currents (i.e., Ekman heat fluxes) have an important impact on the SST variability. An analysis of the surface mixed layer heat budget indicates that the heat fluxes (the sum of turbulent heat fluxes and Ekman heat fluxes) can effectively explain much of the SST variability related to the two types of ENSO. |
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