[gradsusr] Parcel temperature

[Jeffrey Duda]

Kevin,
You are going to have to compute the parcel path yourself using the standard
formulas for the dry and moist adiabatic lapse rates unless someone has a
script that already does that.

Recall that the dry adiabatic lapse rate is g/Cp (Cp = 1004 or 1005 J/kg/K)
or use the fact that T1 = T2*(P1/P2)^(Rd/Cp) for parcel temperatures T1 and
T2 at pressure levels P1 and P2 (Rd = 287.05 J/kg/K).  The moist adiabatic
lapse rate is a much more complicated formula, but you can find it in
various places including the AMS glossary, linked here:
http://amsglossary.allenpress.com/glossary/search?id=moist-adiabatic-lapse-rate1
)

Jeff

On Tue, Mar 8, 2011 at 9:33 AM, Info Severeweather <info at severeweather.nl>wrote:

> Thanks for your reaction, its for calculating the CAP with this formula:  Environmental
> temperature - parcel temperature (both in region with max temperature
> difference)
>
> And it is in the pbl yes!
>
>
>
> Regards,
>
> Kevin
>
> *Van:* gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org]
> *Namens *Jeffrey Duda
> *Verzonden:* dinsdag 8 maart 2011 16:11
> *Aan:* GrADS Users Forum
> *Onderwerp:* Re: [gradsusr] Parcel temperature
>
>
>
> Kevin,
> Do you mean a surface parcel or just the temperature at the PBL top?
>
> Jeff Duda
>
> On Tue, Mar 8, 2011 at 6:55 AM, Info Severeweather <info at severeweather.nl>
> wrote:
>
> Hello,
>
>
>
> First of all thanks for the reply of the fullscreen plot it works perfect!
>
> Now I have a question of someone has some tips to calculate the parcel
> temperature around PBL.
> now just found the parameter to get the pbl height with hpblsfc, so can
> someone help me?
>
>
>
> Thanks in advanced!
>
> Kevin
>
>
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>
>
>
> --
> Jeff Duda
> Iowa State University
> Meteorology Graduate Student
> 3134 Agronomy Hall
> www.meteor.iastate.edu/~jdduda <http://www.meteor.iastate.edu/%7Ejdduda>
>
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>


-- 
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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