Re: Convection is fiction

From	Poutnik <poutnik4nntp@gmail.com>
Newsgroups	sci.physics
Subject	Re: Convection is fiction
Date	2016-08-22 19:14 +0200
Organization	A noiseless patient Spider
Message-ID	<npfbuj$uap$1@dont-email.me> (permalink)
References	<e5b8b178-c782-4768-ac07-0cf0b4f62c15@googlegroups.com> <upq9rb9itah8fb03u990e1ppt12tsbr004@4ax.com> <23764527.rf7BzDKH0Z@PointedEars.de> <npf6mu$9r6$1@dont-email.me> <4805089.ixb8bjaV6e@PointedEars.de>

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On 08/22/2016 06:56 PM, Thomas 'PointedEars' Lahn wrote:
> Poutnik wrote:
>
>> On 08/21/2016 05:57 PM, Thomas 'PointedEars' Lahn wrote:
>>> ....atmospheric pressure that
>>> is decreasing approximately exponentially with altitude within the higher
>>> troposphere:
>>>
>>>   p ≈ p₀ exp(−g M h∕(R T₀))
>>>
>>> where
>>>
>>>   p  – atmospheric pressure
>>>   p₀ – standard atmospheric pressure at sea level (101'326 Pa)
>>>   g  – Earth-surface gravitational acceleration (ca. 9.81 m∕s²)
>>>   M  – molar mass of dry air (ca. 0.03 kg∕mol)
>>>   h  – altitude
>>>   R  – universal gas constant (ca. 8.31 J mol⁻¹ K⁻¹)
>>>   T₀ – standard temperature at sea level (288.15 K = 15 °C)
>>>
>>
>> This approximation serves well for low troposhere near sea level,
>> but does not count with the decreasing of temperature with altitude.
>> […]
>
> This approximation is for higher altitudes within the troposphere.  Unless,
> of course, you find it prudent to correct the Wikipedia article it is from:
>
> <https://en.wikipedia.org/wiki/Atmospheric_pressure#Altitude_variation>
>

Why should I correct Wikipedia, when it is correct ?

If you read the page carefully, it provides my formula
and the one you have posted as an approximation.

By the higher altitude is not meant the high troposhere altitude.

It is meant just an altitude
where initial linear approximation is not applicable anymore,
and the simple exponential formula is the next one to choose.
But it has significant error for the high troposphere.

BTW, it may seem interesting that you have snipped my post,
while keeping intact your one I was responding to....

Thread

Convection is fiction Claudius Denk <claudiusdenk@gmail.com> - 2016-08-13 09:44 -0700
  Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-13 15:14 -0700
  Re: Convection is fiction Michael J. Strickland <michael06582@comcast.net> - 2016-08-17 19:01 -0400
    Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-17 16:28 -0700
      Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-17 22:20 -0700
    Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-21 17:57 +0200
      Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-21 18:16 +0200
        Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-21 18:46 +0200
          Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-21 18:56 +0200
            Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-21 19:09 +0200
              Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-21 19:27 +0200
              Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 07:39 +0200
                Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-22 19:58 -0700
              Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 17:17 +0200
                Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-22 20:02 -0700
            Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-21 12:38 -0700
              Re: Convection is fiction Claudius Denk <claudiusdenk@gmail.com> - 2016-08-21 17:11 -0700
                Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-21 19:59 -0700
        Re: Re: Convection is fiction Michael J. Strickland <michael06582@comcast.net> - 2016-08-21 22:34 -0400
          Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 06:52 +0200
          Re: Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-22 19:02 +0200
            Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 19:17 +0200
              Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-22 20:05 -0700
              Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 01:16 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 05:53 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 18:47 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 21:04 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 06:09 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 19:03 +0200
                Re: Convection is fiction Sergio <invalid@invalid.com> - 2016-08-24 12:16 -0500
                Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-24 11:11 -0700
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 21:36 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-25 06:20 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-25 08:13 +0200
                Re: Convection is fiction Sergio <invalid@invalid.com> - 2016-08-25 09:40 -0500
      Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-21 12:14 -0700
      Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 17:45 +0200
        Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-22 18:56 +0200
          Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 19:14 +0200
            Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-22 20:54 +0200
              Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 01:56 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 06:02 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 06:14 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 19:07 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 21:15 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 06:31 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 06:54 +0200
            Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 01:10 +0200
              Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 05:53 +0200
              Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 07:32 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 19:15 +0200
                Re: Convection is fiction Poutnik <poutnik4nntp@gmail.com> - 2016-08-24 21:11 +0200
                Re: Convection is fiction Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-24 21:26 +0200
                Re: Convection is fiction Sergio <invalid@invalid.com> - 2016-08-24 15:07 -0500
        Re: Convection is fiction James McGinn <jimmcginn9@gmail.com> - 2016-08-22 20:04 -0700
  Re: Convection is fiction Claudius Denk <claudiusdenk@gmail.com> - 2016-08-21 19:31 -0700

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