Transcription of Madden-Julian Oscillation: Recent Evolution, Current ...
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Madden-Julian Oscillation: Recent Evolution, Current ...
Madden-Julian Oscillation: Recent Evolution, Current Status and Predictions Update prepared by the Climate Prediction Center Climate Prediction Center / NCEP. 29 June 2020. Overview A pair of Kelvin waves are currently circumnavigating the tropics and roughly 180 degrees out of phase, with one approaching the Date Line and another the Prime Meridian. There is some suggestion of a lower frequency intraseasonal signal over the Indian Ocean which may grow into a MJO event in conjunction with the Kelvin wave that is approaching the Prime Meridian. Model guidance supports a growing intraseasonal signal over the western Indian Ocean during the next week, with this feature pushing toward the eastern Indian Ocean by mid-July. Extratropical impacts from the MJO, should it develop, appear unlikely at this time. A discussion of potential impacts for the global tropics and those related to the are updated on Tuesday at: 200-hPa Velocity Potential Anomalies Green shades: Anomalous divergence (favorable for precipitation).
Figures below show MJO associated OLR anomalies only (reconstructed from RMM1 and RMM2) and do not include contributions from other modes (i.e., ENSO, monsoons, etc.) •In contrast, the constructed analog features strong convective anomalies with enhanced convection continuing eastward over the Maritime Continent during the next two weeks.
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