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Run
MM5 with North American Regional Reanalysis (NARR) data.
This instructions are valid for NARR data obtained from NCAR
(http://dss.ucar.edu/pub/narr).
When downloading data from this site, one needs to download the
3D, sfc, flx
and FIXED files. Note that the FIXED fields have
a datestamp of 1979-11-08_00.
pregrid:
Run pregrid twice.
First with the following Vtable (use FIXED input data and
date stamp 1979-11-08_00)
GRIB | Level| Level|
Level| REGRID | REGRID | REGRID |
Code | Code | 1 | 2 | Name
| Units | Description |
-----+------+------+------+---------+--------+----------------------------------+
81 | 1 | 0 |
| LANDSEA | |
Land/Sea flag |
7 | 1 | 0 |
| SOILHGT | m |
Terrain field of source analysis |
224 | 1 | 0 | |
SOILCAT | | Dominant
soil type category |
225 | 1 | 0 | |
VEGCAT | | Dominant
land use category |
-----+------+------+------+---------+--------+----------------------------------+
RENAME the intermediate file NARRSFC
Run pregrid again - this time for your case date, using the
3D, sfc and flx files as input and the following Vtable:
GRIB|Level|Level|Level|
REGRID | REGRID| REGRID |
Code|Code |1 |2 | Name |
Units | Description |
----+-----+-----+-----+---------+-------+-----------------------------------------+
11 |100 | * | |
T | K |
Temperature |
33 |100 | * | |
U | m s-1 | U |
34 |100 | * | |
V | m s-1 | V |
51 |100 | * | |
SPECHUMD| | Specific Humidity
|
52 |100 | * | |
RH | |
Relative Humidity |
7 |100 | * | |
HGT | m | Height
|
11 |105 | 2 | |
T | K |
Temperature |
52 |105 | 2 | |
RH | |
Relative Humidity |
33 |105 | 10 | |
U | m s-1 | U |
34 |105 | 10 | |
V | m s-1 | V |
1 |1 | 0 | |
PSFC | Pa | Surface Pressure
|
2 |102 | 0 | |
PMSL | Pa | Sea-level Pressure
|
65 |1 | 0 | |
WEASD | kg m-2| Water Equivalent of Accum Snow
Depth |
11 |1 | 0 | |
SKINTEMP| K | Sea-Surface Temperature
|
223 |1 | 0 | |
CANOPYM | kg m-2| Plant Canopy Surface Water |
85 |112 | 0 | 10 | SOILT010| K
| T of 0-10 cm ground layer |
85 |112 | 10 | 40 | SOILT040| K |
T of 10-40 cm ground layer |
85 |112 | 40 |100 | SOILT100| K |
T of 40-100 cm ground layer |
85 |112 | 100 |200 | SOILT200| K |
T of 100-200 cm ground layer |
144 |112 | 0 | 10 | SOILM010| |
Soil Moisture of 0-10 cm ground layer |
144 |112 | 10 | 40 | SOILM040| |
Soil Moisture of 10-40 cm ground layer |
144 |112 | 40 |100 | SOILM100| |
Soil Moisture of 40-100 cm ground layer |
144 |112 | 100 |200 | SOILM200| |
Soil Moisture of 100-200 cm ground layer|
----+-----+-----+-----+---------+-------+-----------------------------------------+
regridder:
MAKE the following CHANGE to the regridder source code:
REGRID/regridder/src/regridder.F, COMMENT the CALL on line
358 OUT. RE-compile.
IF ( ( wind_llflag .EQ. 3 ) .OR. ( wind_llflag .EQ. 5 ) )
THEN
CALL proc_map_to_met_winds ( wind_xlonc
, wind_cone_fac , wind_xlatc )
END IF
By commenting the CALL to proc_map_to_met_winds, out, you will
prevent the double rotation to earth coordinates, as NARR data
is already in earth coordinates. Just REMEMBER
to add this call back in for any other data you are using, else
the winds for other datasets will be wrong.
Change the namelist.input file, so that NARRSFC is read in
during the execution of this program (MAKE sure the "/"
is from after terrain_file_name, to after constants_full_name).
root
=
'../pregrid/FILE'
terrain_file_name
= '../../TERRAIN/TERRAIN_DOMAIN1'
constants_full_name
= '../pregrid/NARRSFC' /
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