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Figure 2.4 Chatham Islands summer and autumn rainfall anomalies for the period 1878 - 2004, shown as the percentage of the 1971-2000 normal

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The smoothed curve indicates the long-term trend.

Text description of figure

The figure shows two bar graphs of seasonal precipitation for summer (top), and autumn (bottom), spanning the period of 1878-2004. The height of the bar indicates the amount of rainfall as a percentage of the 1971-2000 normal. The seasonal rainfall varies a lot through the period, ranging between about 50% and 200% of normal. Summers were notably wetter during 1940-1960, and autumns drier during 1925-1950. The long-term trend, superimposed on the histogram bars, indicates a slight increase in summer rainfall and little change in autumn.