Convective inhibition: Difference between revisions
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<div class="definition"><div class="short_definition">(Abbreviated CIN.) The [[energy]] needed to lift an [[air parcel]] vertically and pseudoadiabatically from its originating level to its [[level of free convection]] (LFC).</div><br/> <div class="paragraph">For an [[air parcel]] possessing positive [[CAPE]], the CIN represents the negative area on a [[thermodynamic diagram]] having coordinates [[linear]] in [[temperature]] and logarithmic in [[pressure]]. The negative area typically arises from the presence of a [[lid]]. Even though other factors may be favorable for [[development]] of [[convection]], if convective inhibition is sufficiently large, deep convection will not form. The convective inhibition is expressed (analogously to CAPE) as follows: <div class="display-formula"><blockquote>[[File:ams2001glos-Ce31.gif|link=|center|ams2001glos-Ce31]]</blockquote></div> where ''p''<sub>''i''</sub> is the pressure at the level at which the parcel originates, ''p''<sub>''f''</sub> is the pressure at the LFC, ''R''<sub>''d''</sub> is the [[specific]] gas constant for [[dry air]], ''T''<sub>''vp''</sub> is the [[virtual temperature]] of the lifted parcel, and ''T''<sub>''ve''</sub> is the virtual temperature of the [[environment]]. It is assumed that the environment is in [[hydrostatic balance]] and that the pressure of the parcel is the same as that of the environment.</div><br/> </div> | <div class="definition"><div class="short_definition">(Abbreviated CIN.) The [[energy]] needed to lift an [[air parcel]] vertically and pseudoadiabatically from its originating level to its [[level of free convection]] (LFC).</div><br/> <div class="paragraph">For an [[air parcel]] possessing positive [[CAPE]], the CIN represents the negative area on a [[thermodynamic diagram|thermodynamic diagram]] having coordinates [[linear]] in [[temperature]] and logarithmic in [[pressure]]. The negative area typically arises from the presence of a [[lid]]. Even though other factors may be favorable for [[development]] of [[convection]], if convective inhibition is sufficiently large, deep convection will not form. The convective inhibition is expressed (analogously to CAPE) as follows: <div class="display-formula"><blockquote>[[File:ams2001glos-Ce31.gif|link=|center|ams2001glos-Ce31]]</blockquote></div> where ''p''<sub>''i''</sub> is the pressure at the level at which the parcel originates, ''p''<sub>''f''</sub> is the pressure at the LFC, ''R''<sub>''d''</sub> is the [[specific]] gas constant for [[dry air]], ''T''<sub>''vp''</sub> is the [[virtual temperature]] of the lifted parcel, and ''T''<sub>''ve''</sub> is the virtual temperature of the [[environment]]. It is assumed that the environment is in [[hydrostatic balance]] and that the pressure of the parcel is the same as that of the environment.</div><br/> </div> | ||
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Revision as of 16:42, 25 April 2012
convective inhibition
(Abbreviated CIN.) The energy needed to lift an air parcel vertically and pseudoadiabatically from its originating level to its level of free convection (LFC).
For an air parcel possessing positive CAPE, the CIN represents the negative area on a thermodynamic diagram having coordinates linear in temperature and logarithmic in pressure. The negative area typically arises from the presence of a lid. Even though other factors may be favorable for development of convection, if convective inhibition is sufficiently large, deep convection will not form. The convective inhibition is expressed (analogously to CAPE) as follows: where pi is the pressure at the level at which the parcel originates, pf is the pressure at the LFC, Rd is the specific gas constant for dry air, Tvp is the virtual temperature of the lifted parcel, and Tve is the virtual temperature of the environment. It is assumed that the environment is in hydrostatic balance and that the pressure of the parcel is the same as that of the environment.
