In Denver the atmospheric pressure is approx 12.1 psi. As you go up in elevation this will drop. Even going up a mere 500' will change it. I had to learn all the de rated values for the surrounding areas for natural gas in appliances. Delivery pressures and orifice sizing will change or you will have under or over firing.
The Partial Pressure of Oxygen in ambient air in Denver (610mmHg) is 128.1mmHg.
Its the air pressure.
less air pressure in denver
The less air pressure, the farther the baseball goes. Hence, Denver....
florida
Boilers have to be adjusted because of less ( thinner air) Oxygen
In both places, 20% of the atmosphere is oxygen. However, in Denver the atmospheric pressure is lower, and the partial pressure of oxygen is lower, so less oxygen is available for respiration, and athletic performance there will be diminished.
A child takes a helium balloon on a plane from Denver (with an air pressure of 0.83 atm) on a cool day when the temperature is 20C to Boston (at sea level, with an air pressure of 1.0 atm) where the temperature is 5C. Assume that no gas escapes from the balloon during the flight. What is the volume of the balloon in Boston, relative to its size in Denver
Air Pressure
It is different in that the seas don't have air pressure. No air; no air pressure.
Google "QNH" JCF
Air pressure affects air movement because air moves from high pressure to low pressure. The air pressure pushes or will press the air around.