Recall that the normal lapse rate of temperature change with altitude is 6.4 C°/1000 m, or 3.5 F°/1000 ft. Calculate the difference in elevation between La Paz and Concepción and calculate what the difference in their mean (average) annual temperatures should be, based on cooling at the normal lapse rate. Is the actual difference between the mean annual temperatures for these two cities higher, lower, or the same as that produced by calculating average normal lapse rate conditions?


The absolute difference in average annual temperature between La Paz and Concepción is lower than that found by calculating the average normal lapse rate between the two locations. The actual annual temperature range; 25.0°C - 9.0°C = 16C°. At the normal lapse rate; 3613 m difference in altitude times 6.4C° per 1000 m = 23.1C°. Stable conditions produced by lower environmental lapse rates must be in effect during winter months (May to August).

Environmental & Atmospheric Sciences

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