Convective transport

Tasks

task	content versions	description
sub	10	compute up/downdrafts from humidity etc; many old vertical interpolations
conv-gg	11,12	compute up/downdrafts from humidity etc; complete revision by Dirk Olivie to avoid interpolations etc
conv-ec3	20,21	ECMWF (ERA40) convective fields to TM cells; 3hr timeres ([21,00],[00,03],...)
conv-ec6	20,21	ECMWF (ERA40) convective fields to TM cells; 6hr timeres ([18,00],[00,06],...)

Content versions

The content version is an attribute in hdf files.

content version	description
10	initial number (march 2003)
11	revision of convection by Dirk Olivie (conv-gg) $^{\color{red}1)}$
12	revision of convection by Dirk Olivie (conv-gg)
20	computed from ECMWF convective fields (conv-ec) $^{\color{red}1)}$
21	revision of convection by Dirk Olivie (conv-gg)

1)	Wrong units were written to hdf attributes: was 'kg/m3 s', should be 'kg/m2/s' .

Entrements and detrements

file	param	description	unit	levels	from	time res. (hr)	grib code	hor. comb.	vert. comb	Comments
sub	eu	entrainment updrafts	kg/m2/s	1:lm	gg	[21,03],..	161	area aver	sum	old file 's'; to be reconsidered by Dirk ?
sub	du	detrainment updrafts	kg/m2/s	1:lm	gg	[21,03],..	162	area aver	sum	old file 's'; to be reconsidered by Dirk ?
sub	ed	entrainment downdrafts	kg/m2/s	1:lm	gg	[21,03],..	164	area aver	sum	old file 's'; to be reconsidered by Dirk ?
sub	dd	detrainment downdrafts	kg/m2/s	1:lm	gg	[21,03],..	165	area aver	sum	old file 's'; to be reconsidered by Dirk ?
sub, subc	clbas	cloud base	level	1	ll	[21,03],..		-	-	old file 'c'; to be reconsidered by Frank ?
sub, subc	cltop	cloud top	level	1	ll	[21,03],..		-	-	All three are integer fields.
sub, subc	cllfs	level of free sinking	level	1	ll	[21,03],..		-	-	Included in hdf files, but seperate binary file 'subc' for grib output

The input consists of 6 hourly accumulated surface fields and instantaneous wind, temperature, and humidity, valid for the mid of the intervals.

Convective parameters are computed on a Gaussian grid and averaged over the cell area.

The convective cloud fields are computed from the 3D entrement/detrement fields. They are integer fields containing a level number.

In grib files it is imposible to save integer fields. If grib output is requested, a binary file 'subc' is written using:

integer :: tau
 
integer :: iclbasg(im,jm)
integer :: icltopg(im,jm)
integer :: icllfsg(im,jm)
 
open(unit=1234,file='c.b',form='unformatted')
 
write (1234) tau, iclbasg, icltopg, icllfsg

Description by Dirk Olivie in progress.