Re: Convection is fiction

From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	sci.physics
Subject	Re: Convection is fiction
Date	2016-08-24 01:10 +0200
Organization	PointedEars Software (PES)
Message-ID	<1999375.ElGaqSPkdT@PointedEars.de> (permalink)
References	(1 earlier) <upq9rb9itah8fb03u990e1ppt12tsbr004@4ax.com> <23764527.rf7BzDKH0Z@PointedEars.de> <npf6mu$9r6$1@dont-email.me> <4805089.ixb8bjaV6e@PointedEars.de> <npfbuj$uap$1@dont-email.me>

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Poutnik wrote:

[Fixed quotation]

> 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.

How did you get that idea?  It said then, and is still saying:

| […]
| For higher altitudes within the troposphere, the following equation (the 
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| barometric formula) relates atmospheric pressure p to altitude h
| 
| [equation] ≈ [approximation],
| 
| [approximation that I posted]
 
> BTW, it may seem interesting that you have snipped my post,
> while keeping intact your one I was responding to....

It was irrelevant.

As for quoting, omissions are to be marked with “[…]” or “[...]”, not “...” 
or “....”, to leave no ambiguity.

-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.

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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