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Validation of the Historical Reconstruction of the MJO Index

Cloud cover and surface winds from the Extended Edited Synoptic Cloud Reports over the ocean were conditionally averaged (composited) based on MJO phase using the Wheeler and Hendon (2004) index and the historical reconstruction over the shared period (1979-2008) and the pre-1979 period over which data is available (1952-1978). All MJO events of amplitude less than one were ignored. In the figures below, the panels represent phases 1 through 8 from top to bottom.
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Figure 1: Wheeler and Hendon (2004) index for 1979 to 2008
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Figure 2: Historical reconstruction index for 1979 to 2008
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Figure 3: Historical reconstruction index for 1952 to 1978