Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

plot Particle Size Distribution in Morrison scheme

This post was from a previous version of the WRF&MPAS-A Support Forum. New replies have been disabled and if you have follow up questions related to this post, then please start a new thread from the forum home page.

luis_met2021

New member
Hi everyone,

I would like to plot the Particle Size Distribution in Morrison 2005 scheme. I found the following variables in the code:

! SIZE PARAMETER VARIABLES
REAL, DIMENSION(KTS:KTE) :: LAMC ! SLOPE PARAMETER FOR DROPLETS (M-1)
REAL, DIMENSION(KTS:KTE) :: LAMI ! SLOPE PARAMETER FOR CLOUD ICE (M-1)
REAL, DIMENSION(KTS:KTE) :: LAMS ! SLOPE PARAMETER FOR SNOW (M-1)
REAL, DIMENSION(KTS:KTE) :: LAMR ! SLOPE PARAMETER FOR RAIN (M-1)
REAL, DIMENSION(KTS:KTE) :: LAMG ! SLOPE PARAMETER FOR GRAUPEL (M-1)
REAL, DIMENSION(KTS:KTE) :: CDIST1 ! PSD PARAMETER FOR DROPLETS
REAL, DIMENSION(KTS:KTE) :: N0I ! INTERCEPT PARAMETER FOR CLOUD ICE (KG-1 M-1)
REAL, DIMENSION(KTS:KTE) :: N0S ! INTERCEPT PARAMETER FOR SNOW (KG-1 M-1)
REAL, DIMENSION(KTS:KTE) :: N0RR ! INTERCEPT PARAMETER FOR RAIN (KG-1 M-1)
REAL, DIMENSION(KTS:KTE) :: N0G ! INTERCEPT PARAMETER FOR GRAUPEL (KG-1 M-1)
REAL, DIMENSION(KTS:KTE) :: PGAM ! SPECTRAL SHAPE PARAMETER FOR DROPLETS


Is there anyone know how to calculate the diameter from these variables?
By default, the number concentration output is at every grid point, but I don't have information on the size range.

Kind regards,
Lna
 
Lna,
I am sorry that we don't have a specific method to calculate particle size distribution. Please refer to the literature or talk to the scheme developer to find a solution.
 
Top