Subroutine that computes absolute vorticity. More...

Functions/Subroutines
subroutine	CALDIV (UWND, VWND, DIV)
	CALDIV computes divergence. More...

subroutine	CALGRADPS (PS, PSX, PSY)

subroutine	CALVOR (UWND, VWND, ABSV)

Detailed Description

Subroutine that computes absolute vorticity.

This routine computes the absolute vorticity.

Parameters

[in]	UWND	U wind (m/s) mass-points.
[in]	VWND	V wind (m/s) mass-points.
[out]	ABSV	absolute vorticity (1/s) mass-points.

Date	Programmer	Comments
1992-12-22	Russ Treadon	Initial
1998-06-08	T Black	Convesion from 1-D to 2-D
2000-01-04	Jim Tuccillo	MPI Version
2002-01-15	Mike Baldwin	WRF Version C-grid
2005-03-01	H Chuang	Add NMM E grid
2005-05-17	H Chuang	Add Potential vorticity calculation
2005-07-07	B Zhou	Add RSM in computing DVDX, DUDY and UAVG
2013-08-09	S Moorthi	Optimize the vorticity loop including threading
2016-08-05	S Moorthi	add zonal filetering
2019-10-17	Y Mao	Skip calculation when U/V is SPVAL
2020-11-06	J Meng	Use UPP_MATH Module

Definition in file CALVOR.f.

Function/Subroutine Documentation

subroutine CALDIV	(	real, dimension(im,jsta_2l:jend_2u,lm), intent(in)	UWND,
		real, dimension(im,jsta_2l:jend_2u,lm), intent(in)	VWND,
		real, dimension(im,jsta:jend,lm), intent(inout)	DIV
	)

CALDIV computes divergence.

For GFS, this routine copmutes the horizontal divergence using 2nd-order centered scheme on a lat-lon grid

Parameters

Date	Programmer	Comments
2016-05-05	Sajal Kar	Modified CALVORT to compute divergence from wind components
2016-07-22	S Moorthi	Modified polar divergence calculation

Definition at line 410 of file CALVOR.f.

References exch_f().

subroutine CALGRADPS	(	real, dimension(im,jsta_2l:jend_2u), intent(in)	PS,
		real, dimension(im,jsta_2l:jend_2u), intent(inout)	PSX,
		real, dimension(im,jsta_2l:jend_2u), intent(inout)	PSY
	)

Parameters

[in] ps CALGRADPS computes gardients of a scalar field PS or LNPS.

For GFS, this routine computes horizontal gradients of PS or LNPS. Using 2nd-order centered scheme on a lat-lon grid.

Parameters

[in]	PS	Surface pressure (Pa) mass-points.
[out]	PSX	Zonal gradient of PS at mass-points.
[out]	PSY	Meridional gradient of PS at mass-points.

Date	Programmer	Comments
2016-05-05	Sajal Kar	Reduced from CALVORT to zonal and meridional gradients of given surface pressure PS, or LNPS

Definition at line 645 of file CALVOR.f.

References exch_f().