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The impact of the MJO - Bridging the gap between weather and climate

Donald, A., Lennox, S.M., Meinke, H. and White, N.C. (2007) The impact of the MJO - Bridging the gap between weather and climate. In: The 87th AMS Annual Meeting, 13-18 January 2007, Texas, USA.

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The Madden-Julian Oscillation (MJO) is a tropical atmospheric phenomenon, associated with periods of active convection in the eastern hemisphere tropics. The MJO's temporal scale (events happen at intervals from 22-90 days) coincides with a gap between weather and climate forecasts. Application of MJO data begins to address this gap. The RMM Index is an MJO proxy and indicates the amplitude and location (Phases 1-8) of MJO active convection. Analysis demonstrates that the MJO influences weather well beyond the tropics, on this intraseasonal timescale. We analysed global rainfall data (summer/winter rainfall patterns) with respect to the RMM Index phases of the MJO. Observed MSLP frequencies are at least partially explained by the MJO and advance a causal relationship between the tropical MJO and tropical and extra-tropical rainfall and MSLP anomalies.

Item Type:Conference or Workshop Item (Paper)
Subjects:Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Live Archive:18 Feb 2024 23:03
Last Modified:18 Feb 2024 23:03

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