[Wrf-users] Query Reg the CApe and mcape.
pdjakow at gmail.com
Sat Oct 30 00:43:44 MDT 2010
2010/10/29 Geeta Geeta <geeta124 at hotmail.com>:
> Dear All,
> I have one Query Reg the Available diagnostic output from WRF.
> I want to analyse the thermodynamic parameters during a heavy rainfall event
> over a lerge REGION during pre monsoon season over India.
> the cape, cin, mcape and mcin are 4 diagnostic outputs from the WRF model.
> My doubt is that
> 1. cape and cin are available at 19 levels (or whatever levels defined in
> the model) and mcape and mcin at at one level.
> 2. As per the definition of cape and cin, it should be a unique value at a
> particular point and at a particular time. So what is the difference
> say cape at 1000hPa and Cape at 850hPa.
> cape 19 0 CAPE (J/kg)
> cin 19 0 CIN (J/kg)
> mcape 1 0 MCAPE (J/kg)
> mcin 1 0 MCIN (J/kg)
> lcl 1 0 LCL (meters AGL)
> lfc 1 0 LFC (meters AGL)
> @ global String comment TITLE = OUTPUT
> The Difference between the two is not Clear.
> Wrf-users mailing list
> Wrf-users at ucar.edu
>From RIP User Guide:
cap3: Convective available potential energy (CAPE) of parcels at all
3D grid points, J kg-1. (3D)
In this diagnostic field, CAPE is calculated for every grid point in
the entire 3D domain, based on the lifting of a parcel starting from
that grid point. It is defined as the accumulated buoyant energy from
the LFC to the equilibrium level. To get CAPE as a 2D field, showing
CAPE only from the parcel in each column with maximum qe below 3000 m
AGL, use mcap.
mcap: Maximum convective available potential energy (MCAPE), J kg-1. (2D)
This is the CAPE for the parcel in each column with maximum qe below 3000 m AGL.
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