CALPW.f File Reference

Subroutine that computes precipitable water. More...

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Functions/Subroutines
subroutine	CALPW (PW, IDECID)

Detailed Description

Subroutine that computes precipitable water.

 This routine computes precipitable water in a column
 extending from the first atmospheric ETA layer to the
 model top. The definition used is
                      TOP
 precipitable water = sum (Q+CLDW) DP*HTM/G
                      BOT
 where,
 BOT is the first ETA layer,
 TOP is the model top,
 Q is the specific humidity (kg/kg) in the layer
 CLDW is the cloud water (kg/kg) in the layer
 DP (Pa) is the layer thickness.
 HTM is the height mask at that layer (=0 if below ground)
 G is the gravitational constant.

Parameters

[in]

PW

Array of precipitable water.

Program history log:

Date	Programmer	Comments
1992-12-24	Russ Treadon	Initial
1996-03-04	Mike Baldwin	Add cloud water and speed up code
1998-06-15	T Black	Convesion from 1-D to 2-D
2000-01-04	Jim Tuccillo	MPI Version
2002-06-19	Mike Baldwin	WRF Version
2004-12-30	H Chuang	Update to calculate total column for other hydrometeors
2014-11-12	Sarah Lu	Update tp calculate aerosol optical depth
2015-07-02	Sarah Lu	Update to calculate scattering aerosal optical depth (18)
2015-07-04	Sarah Lu	Correct PW integration for AOD (17)
2015-07-10	Sarah Lu	Update to calculate asymetry parameter
2019-07-25	Li(Kate) Zhang	Merge Sarah Lu's update for FV3-Chem
2020-11-10	Jesse Meng	Use UPP_PHYSICS Module

Author

Russ Treadon W/NP2

Date

1992-12-24

Definition in file CALPW.f.