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Fig. 17

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A comparison of F-UT patterns of (right column) conductivity-corrected observed indices and (left column) the corresponding modelled pattern, the top row is for the northern hemisphere an index, (a) anm and (b) ancc = an/PΣN; the top middle row is for the southern hemisphere as index, (c) asm and (d) ascc = as/PΣS; the bottom row is for the global hemisphere am index, (e) amm = (anm + asm)/2 and (f) amcc = (ancc + ascc)/2. In all three cases the free fit parameter used is cPM = 0.27, derived by minimising the r.m.s. fit residual for the am index case, {〈(amcc − amm)2〉}1/2.

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