Tucson annual Tuc Figure 29-3: Average Bozeman , ; Bozeman Montana Arizona, Alas

Question

Tucson annual Tuc Figure 29-3: Average Bozeman , ; Bozeman Montana Arizona, Alaska from 1905 to 2009, Five-year moving werage shown with thick trend line: "best-fit" shown with thin Data straight line. (Data sources : National Climate Center and Alaska Climate Research CenterUniversity of Alaska, Nome Aks) On O & B111111111 to show the most general- it such a line may be misleading , which frequently is not running averages, creating a use- on the same chart (such as has also Finally, it is possible to plot a straight "best fit" line, cale ized temperature trend over a long period of time. However, because it can make temperature change appear linear and c Best fit lines are often superimposed over the annual and 3-year with several ful composite snapshot" levels of data generalization been done in Figure 29-3). Similar techniques can be used when looking at long-term pr is shown for Bozeman and Tucson in Figure 29-4. The precipitation Varia" scribes the expected departure from average ("normal") precip tion variability is generally greater in dry climates than in humid ones. patterns, such as of a locati in any given year. Precipita- Bozeman Tucson 1111111111111 Figure 294 Annual precipitation in Tucson, Arizona, and BozemanMontana, from 1905 to 2009. Five-year moving an erage shown thick , -fit" shown with with trend line"best thin straight line. (Data source: National Climate Data Center) 194

Explanation / Answer

19951. In these three cities, average annual temperature has seen a general trend of increasing.

2.Tucson +5     Bozemon +5   Nome +3

3. a) Tucson    1995                        Bozemon          1990                              Nome        1982

b) Tucson 1925                               Bozemon                1952                           Nome 1978

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