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The eastern portion of the ITF was approximated at 14.9 degrees North, which was ahead of the climatology mean position by two degrees

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From May 21−31, 2011, the ITF experienced a significant northward advancement, in particular at its eastern segment. A major proportion of the ITF is now ahead of the climatology mean position due to enhanced southerlies in the Gulf of Guinea region and moisture convergence from the Congo Air Boundary.

The mean western portion of the ITF was located approximately at 15.4 degrees North and led the

climatology mean by 0.3 degrees. The eastern portion of the ITF was approximated at 14.9 degrees North, which was ahead of the climatology mean position by two degrees. Figure 1 shows the current ITF position relative to the climatology position for the third dekad of May and its previous position during the second dekad of May. Figures 2 and 3 are time series, illustrating the latitudinal means of the western and eastern portions of the ITF, respectively, and their evolutions since the start of April.

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