UPP (develop)
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lfmfld() computes layer mean LFM fields. More...
Go to the source code of this file.
Functions/Subroutines | |
subroutine | lfmfld (rh3310, rh6610, rh3366, pw3310) |
LFMFLD() computes layer mean LFM fields. | |
lfmfld() computes layer mean LFM fields.
This routine computes three layer mean relative humidities and a precipitable water field from ETA level data. The computed fields are intended to mimic similar fields com- puted by the LFM. The algorithm used here is fairly pri- mative.
In each column above a mass point on the ETA grid we set the following target pressures: Sigma layer 1.00 pressure: Surface pressure Sigma layer 0.66 pressure: 0.50 * Surface pressure Sigma layer 0.33 pressure: 0.4356 * Surface pressure
Given there pressures a surface up summation is made of relative humidity and/or precipitable water between these target pressures. Each term in the summation is weighted By the thickness of the ETA layer. The final layer mean is this sum normalized by the total depth of the layer. There is, obviously, no normalization for precipitable water.
[out] | RH3310 | Sigma layer 0.33-1.00 mean relative humidity. |
[out] | RH6610 | Sigma layer 0.66-1.00 mean relative humidity. |
[out] | RH3366 | Sigma layer 0.33-0.66 mean relative humidity. |
[out] | PW3310 | Sigma layer 0.33-1.00 precipitable water. |
Date | Programmer | Comments |
---|---|---|
1992-12-22 | Russ Treadon | Initial |
1993-07-27 | Russ Treadon | Modified summation limits from 0.66*PSFC to 0.75*PSFC and 0.33*PSFC to 0.50*PSFC, where PSFC is the surfaces pressure. The reason for this change was recognition that in the LFM 0.33 and 0.66 were measured from the surface to the tropopause not the top of the model. |
1993-09-13 | Russ Treadon | RH calculations were made internal to the routine. |
1996-03-04 | Mike Baldwin | Change PW CALC to include CLD WTR |
1998-06-16 | T Black | Conversion from 1-D to 2-D |
1998-08-17 | Mike Baldwin | Compute RH over ice |
1998-12-22 | Mike Baldwin | Back out RH over ice |
2000-01-04 | Jim Tuccillo | MPI Version |
2002-04-24 | Mike Baldwin | WRF Version |
2019-10-30 | Bo Cui | Remove "GOTO" statement |
2020-11-10 | Jesse Meng | Use UPP_PHYSICS Module |
2021-10-14 | JESSE MENG | 2D DECOMPOSITION |
Definition in file LFMFLD.f.
subroutine lfmfld | ( | real, dimension(ista:iend,jsta:jend), intent(inout) | rh3310, |
real, dimension(ista:iend,jsta:jend), intent(inout) | rh6610, | ||
real, dimension(ista:iend,jsta:jend), intent(inout) | rh3366, | ||
real, dimension(ista:iend,jsta:jend), intent(inout) | pw3310 | ||
) |
LFMFLD() computes layer mean LFM fields.
[out] | RH3310 | real Sigma layer 0.33-1.00 mean relative humidity. |
[out] | RH6610 | real Sigma layer 0.66-1.00 mean relative humidity. |
[out] | RH3366 | real Sigma layer 0.33-0.66 mean relative humidity. |
[out] | PW3310 | real Sigma layer 0.33-1.00 precipitable water. |
Definition at line 52 of file LFMFLD.f.
Referenced by miscln().