Multiple time scales in rainfall variability

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Mar 1993 English Publisher:Springer Science and Business Media LLCJournal:Journal of Earth System Science, volume 102, pages 249-263 (issn: 0253-4126,

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Authors: Subramaniam Moten;

doi: 10.1007/bf02839194

Multiple time scales in rainfall variability

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Abstract

Monthly rainfall data averaged over a selected number of stations in peninsular Malaysia with a long record was subjected to singular spectrum analysis to determine the different modes of fluctuations in the rainfall. The analysis highlights the presence of fluctuations in the QBO time scale to a very long term time scale of 18–5 years which is possibly linked to lunar tidal forcing. There is also evidence of the Malaysian rainfall responding to El-Nino Southern Oscillation. An oscillation with a 7 to 10 year cycle is also evident. The annual cycle as a regular periodic oscillation is well established by the SSA.

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