Problems
207
12.2. Estimate the upper and lower lethal limit environments for a sparrow. For this, assume that the maximum sustainable metabolic rate
for thermoregulation is 3 Mb, and the maximum latent heat loss is
150 w m-2.
12.3. How much food does a 100 kg caribou need (kglday) to survive an
arctic winter with average T, of -20"C? Assume u = 3 mls.
12.4. What is the operative temperature for a sunbather standing on a
beach at noon on a clear day, with T, = 30°C, u = 2 mls, and
a, = 0.7?