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Aquarius surface salinity and the Madden‐Julian Oscillation: The role of salinity in surface layer density and potential energy

Guan, Bin ; Lee, Tong ; Halkides, Daria J. ; Waliser, Duane E.

Geophysical Research Letters, 28 April 2014, Vol.41(8), pp.2858-2869 [Periódico revisado por pares]

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  • Título:
    Aquarius surface salinity and the Madden‐Julian Oscillation: The role of salinity in surface layer density and potential energy
  • Autor: Guan, Bin ; Lee, Tong ; Halkides, Daria J. ; Waliser, Duane E.
  • Assuntos: Aquarius ; Salinity ; Mjo ; Satellite
  • É parte de: Geophysical Research Letters, 28 April 2014, Vol.41(8), pp.2858-2869
  • Descrição: Sea surface salinity (SSS) data from the Aquarius satellite are analyzed along with auxiliary data to investigate the SSS signature of the Madden‐Julian Oscillation (MJO) in the equatorial Indian and Pacific Oceans, the effect of evaporation‐minus‐precipitation (E‐P), the implication for the role of ocean dynamics, and the SSS influence on surface density and potential energy. MJO‐related SSS changes are consistent with E‐P forcing in the western Indian Ocean throughout the MJO cycle and in the central Indian Ocean during the wet phase of the MJO cycle. However, SSS changes cannot be explained by E‐P in the central Indian Ocean during the dry phase and in the eastern Indian and western Pacific Oceans throughout the MJO cycle, implying the importance of ocean dynamics. SSS has an overall larger contribution to MJO‐related surface density and potential energy anomalies than SST. It partially offsets the SST effect in the western‐to‐central Indian Ocean and reinforces the SST effect in the eastern Indian and western Pacific Oceans. Ocean modeling and assimilation need to properly account for salinity effects in order to correctly represent mixed layer variability associated with the MJO. Our results also clarify some discrepancy in previous studies about the E‐P effect on MJO‐related SSS variations. Clarifies role of E‐P on MJO‐related salinity and implication for ocean dynamicsCorrects misinterpretation in a recent study about the role of E‐P on salinityReveals the important effects of salinity in surface layer density and energy

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