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Thin air here - but maybe not every day?
I live in Denver which is at elevation 5280 ft.
Sea level barometer normal is 29.92 " Hg (14.7 psi).
Denver barometer normal is 24.76" Hg (12.16 psi).
Internal combustion engines generate only 83% of the HP of an engine at sea level, and it takes several days for visitors to get acclimatized to the thinner air here if visiting from a lower elevation.
Several days ago I was filling my gas tank, and at the pump next to me was an RV. The RV owner said he was having trouble with the thinner air here, was short of breath, and wondered how long it took to get used to the altitude.
Out of curiosity, when I got home, I checked the barometric pressure via Weather Underground and it listed it at 30.11 " Hg (better than sea level normal), which we get quite often.
So my question is, why should the RV owner been short of breath?Wouldn't air at that Pressure have the same amount of O2 as at sea level?
2 Answers
- AnswerManLv 41 decade agoFavorite Answer
There is no way the barometer can be that high in Denver.
The weather report is giving the barometer corrected to sea level. (It will say something like "sea level pressure.") The actual barometer cannot be anything close to 30" in Denver.
- C AndersonLv 51 decade ago
Just up here in Longmont where we're about 200' lower...
Truth to tell, he was probably suffering from the heat and didn't know it. Afterall, we were up around 101F today, and we were in the high 90s before that. We like to give 'em the double whammy... not enough air and not enough humidity. if one doesn't get 'em, the other will!
It's dry enough here that he might not have realized he was being "cooked". Figured he wasn't too sweaty, so how hot could it be?
He probably made the same mistake that many who visit here make -- lack of fluids -- and was simply dehydrated. We always tell visitors that if they're feeling thirsty, they've probably waited too long. Good rule of thumb for flatlanders in climates like this -- pee clear once a day. Guarantees you won't dry up and blow away. The problem seems to be exacerbated by "altitude sickness" problems when our baro pressure is low. Not sure why. Sure does wipe them out on a hot dry day in the mountains, when we have them.
Our baro here at the moment is the same 30.11 you're reporting down there - a bit more than the standard 29.92.
