Figure 18. This figure illustrates the same data as in Figure 17, but portrayed as decadal averages plotted by their mid- points. The decades represented by the points at 1900 (1895-1904) and 1910 (1905-1914) are the coldest on record in region 3, whereas 1980 (1975-1984), which encompasses the large-scale El Niño of the early 1980s, is the wettest on record. As shown here, the range in annual temperature over the past century has been 1.8° C in region 3 and 2.1° C in region 4, whereas the variability in annual precipitation has been 99 mm in region 3 and 96 mm in region 4.
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