888 mb (Gilbert). Okay, just how high is that?

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greenie88
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888 mb (Gilbert). Okay, just how high is that?

#1 Postby greenie88 » Thu Jul 21, 2005 12:11 am

If I had a mountain in my backyard, how high would it have to be to have an 888 mb pressure at the top assuming my house is at Sea Level?
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LarryWx
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#2 Postby LarryWx » Thu Jul 21, 2005 12:23 am

~ 4K ft
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#3 Postby mobilebay » Thu Jul 21, 2005 2:33 am

:think: I'm usually pretty smart when it comes to the Tropics. However, I have no idea what your talking about. Did I miss something? Maybe I'm wrong, and if I am someone please correct me. I think you are confusing MB heights and Surface Pressures. :D Maybe I'm the one that don't understand. Someone please explain.
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#4 Postby Windy » Thu Jul 21, 2005 2:54 am

mobilebay wrote::think: I'm usually pretty smart when it comes to the Tropics. However, I have no idea what your talking about. Did I miss something? Maybe I'm wrong, and if I am someone please correct me. I think you are confusing MB heights and Surface Pressures. :D Maybe I'm the one that don't understand. Someone please explain.


I think he was trying to say "how high would I, on a normal day, have to go in order to have the pressure be as low as it was at the surface with Gilbert".
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#5 Postby mobilebay » Thu Jul 21, 2005 2:55 am

I see now sorry. :oops:
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Re: 888 mb (Gilbert). Okay, just how high is that?

#6 Postby HurryKane » Thu Jul 21, 2005 4:32 am

greenie88 wrote:If I had a mountain in my backyard, how high would it have to be to have an 888 mb pressure at the top assuming my house is at Sea Level?


This fabulous little tool: http://www.digitaldutch.com/atmoscalc/tableoptions1.htm (you can mix and match English/US units and create your own 1976 US Standard Atmosphere table) says that:

3606 ft = 887.9938 mb
3605 ft = 888.0267 mb
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#7 Postby P.K. » Thu Jul 21, 2005 4:41 am

About 1km does seem right.

Pressure changes by about 1hPa per 10m at sea level, and halves with every 5km you go up. Obviously this isn't exact but it is in the right area.
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TinCan57

#8 Postby TinCan57 » Thu Jul 21, 2005 10:04 am

Interesting! So since I live at Sea Level in New Orleans, and flew to Denver a few months back, I was instantly transported to a Gilbert equivalent air pressure reading.

I didn't have any issues adjusting from -5 to 5200 feet elevation - just got you drunk faster :grrr:
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