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Fig. 7

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Same as Figure 5 for the estimated power input into the magnetosphere, . (Top) The fraction of time in each year, f, for which a valid value is available. (Middle) Annual probability distribution function (pdfs) of daily means of /Po (〈τ=1day/Po ) are colour coded and the black line gives the annual means of 〈τ=1yr/Po . Probabilities are evaluated in bins of /Po that are 0.1 wide and years for which f < 0.5 are omitted. (Bottom) Annual probability distribution function (pdfs) of normalised daily , 〈τ=1day/〈τ=1yr , are colour coded and the black gives the annual means of this normalised which is unity. Probabilities are evaluated in bins of normalised that are 0.1 wide.

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