# Difference between revisions of "Homogeneous atmosphere"

From Glossary of Meteorology

imported>Perlwikibot |
imported>Perlwikibot |
||

Line 9: | Line 9: | ||

</div> | </div> | ||

− | #<div class="definition"><div class="short_definition">A hypothetical [[atmosphere]] in which the [[density]] is constant with height.</div><br/> <div class="paragraph">The [[lapse rate]] of [[temperature]] in such an atmosphere is known as the [[autoconvective lapse rate]] and is equal to ''g''/''R'' (or approximately 3.4°C/100 m), where ''g'' is the [[acceleration of gravity]] and ''R'' is the [[gas constant]] for air. A homogeneous atmosphere has a finite total thickness that is given by ''R''<sub>''d''</sub>''T''<sub>''v''</sub>/''g'', where ''R''<sub>''d''</sub> is the [[gas constant]] for [[dry air]] and ''T''<sub>''v''</sub> is the [[virtual temperature]] (K) at the surface. For a [[surface temperature]] of 273 K, the vertical extent of the homogeneous atmosphere is approximately 8000 m. At the top of such an [[atmosphere]] both the [[pressure]] and [[absolute]] temperature vanish.</div><br/> </div> | + | #<div class="definition"><div class="short_definition">A hypothetical [[atmosphere]] in which the [[density]] is constant with height.</div><br/> <div class="paragraph">The [[lapse rate]] of [[temperature]] in such an atmosphere is known as the [[autoconvective lapse rate|autoconvective lapse rate]] and is equal to ''g''/''R'' (or approximately 3.4°C/100 m), where ''g'' is the [[acceleration of gravity]] and ''R'' is the [[gas constant]] for air. A homogeneous atmosphere has a finite total thickness that is given by ''R''<sub>''d''</sub>''T''<sub>''v''</sub>/''g'', where ''R''<sub>''d''</sub> is the [[gas constant]] for [[dry air]] and ''T''<sub>''v''</sub> is the [[virtual temperature]] (K) at the surface. For a [[surface temperature]] of 273 K, the vertical extent of the homogeneous atmosphere is approximately 8000 m. At the top of such an [[atmosphere]] both the [[pressure]] and [[absolute]] temperature vanish.</div><br/> </div> |

#<div class="definition"><div class="short_definition"><br/>''Same as'' [[adiabatic atmosphere]].</div><br/> </div> | #<div class="definition"><div class="short_definition"><br/>''Same as'' [[adiabatic atmosphere]].</div><br/> </div> | ||

</div> | </div> |

## Latest revision as of 17:09, 25 April 2012

## homogeneous atmosphere

- A hypothetical atmosphere in which the density is constant with height.

The lapse rate of temperature in such an atmosphere is known as the autoconvective lapse rate and is equal to*g*/*R*(or approximately 3.4°C/100 m), where*g*is the acceleration of gravity and*R*is the gas constant for air. A homogeneous atmosphere has a finite total thickness that is given by*R*_{d}*T*_{v}/*g*, where*R*_{d}is the gas constant for dry air and*T*_{v}is the virtual temperature (K) at the surface. For a surface temperature of 273 K, the vertical extent of the homogeneous atmosphere is approximately 8000 m. At the top of such an atmosphere both the pressure and absolute temperature vanish.