Fig. 12


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Polynomial of order 1 (linear fit) to 4 fitted to the yearly mean data by ordinary least-square regression (OLS). The curves are superimposed on the corresponding non-parametric mean (cf. Fig. 6) to show the agreement within 3-σm, and on the base data (gray dots). The lower plot is a close-up view of the low range of the upper plot.

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