Perceptive Temperature Difference Between 0 ft and 9,000 ft

AI Thread Summary
At 9,000 ft, the air pressure is 28.5% lower than at sea level, affecting perceived temperature. A person with a core temperature of 98.6 F in 32 F air would feel a temperature difference of 66.6 F at sea level, but only 47.5 F at 9,000 ft due to reduced thermal capacity. This suggests that the perceived temperature at 9,000 ft would feel like 51 F, rather than the actual 32 F. Factors such as radiation and evaporation also influence heat loss, making the effect less significant for individual comfort. Understanding these differences is crucial for applications like building heating and personal comfort in high altitudes.
aquaflight
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Question:
If the temperature at both 9,000 ft and 0 ft (sea level) is 32 F, how much warmer would it feel at 9,000 ft due to the reduced thermal capacity of the air caused by lower air pressures?

Available Facts:
Air has 28.5% less pressure at 9,000 ft compared with sea level (0 ft). 10.5 psi vs 14.7 psi respectively.

More Details:
At sea level, a person who has a core temperature of 98.6 F who is standing in 32 F dry air would experience a relative temperature difference of 66.6 F. If this same person stood in 32 F dry air at 9,000 ft would he or she only experience a temperature difference of 47.5 F because of the reduced thermal capacity of the air?

Calculations:
0 ft = 98.6 F - 32 F = 66.6 F temperature difference
9,000ft = 66.6 F temperature difference * 71.45% air pressure difference = 47.5 F perceptive temperature difference

Conclusion:
If the above calculations are correct, would a person standing in 32 F dry air at 9,000 ft feel as if he or she is standing in 51 F dry air at sea level (98.6 F - 47.5 F) due to the reduced thermal capacity of the air?

Thank you very much,
Aquaflight
 
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Well, if you're heating a building it definitely matters a lot, by the proportion you derived. For yourself, it would matter a little less because radiation and evaporation both play a pretty significant role in your heat loss.
 
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