For MM5 LSM option (ISOIL=2):
The NCEP/NCAR Reanalysis dataset, Eta (AWIP) dataset and NCEP global Final Analysis archived at NCAR contain sufficient data to run MM5 LSM option. Real-time data from Eta and AVN models available from NCEP ftp site also contain data sufficient to run the LSM option.
Note also that even we have decks or scripts to get the data automatically, it is always a good practice to check the data catalogs (or file lists) for extra information. If the data have missing times or errors, they are likely to be described in the document.
NCEP GDAS Data (2.5 x 2.5 degree resolution)
There are two types of NCEP GDAS data: the type that NCEP provides prior to April 1997 is called the ON84, and the other is called GRIB which is available since April 1997. Read about these datasets in this document.
To obtain ON84 data for periods before April 1997, use the job deck in REGRID/pregrid/on84: get_on84.deck on Cray, get_on84.deck.ibm on IBM or other NCAR SCD computers.
You may use this deck in batch mode, or interactively. When you run this job interactively, make sure that you work in a temporary directory (such as /tmp/username, or $TMPDIR on Cray or /ptmp/username on IBM). You can set up the deck to transfer the files automatically back to your local machine. To do so, you need to include NCAR computer in your local .rhosts file. You can also ftp the files obtained on SCD computer to your local computer.
To obtain the NCEP GRIB data, use the job deck in REGRID/pregrid/ncep.grib: get_ncep.deck on Cray and get_ncep.deck.ibm on IBM.
Catalogs for ON84 data and NCEP GRIB data is available from NCAR/SCD by clicking on the link to the inventories on each page.
You can also find the data file name(s) from these online catalogs, and log on to Cray (IBM) to get it. For example, from the inventory for NCEP GRIB data, you may find that the data file name (VSN number as they are referred to) for February 2000 is Y54804. Then on Cray (IBM), cd to $TMPDIR (/ptmp/username), and type the following to obtain the data:
msread -f BI NCEP-Feb-2000-data /DSS/Y54804
NCEP Global Tropospheric Aanlysis (1 x 1 degree resolution)
This dataset is also referred to as NCEP Final Analysis (FNL). Click here to find more information on this dataset.
NCEP/NCAR Reanalysis Data (2.5 x 2.5 degree resolution)
Read about this dataset in this document. Full data description may be found at NCAR/SCD site.
To obtain this dataset, use the job deck in REGRID/pregrid/nnrp: get_nnrp.deck on Cray and get_nnrp.deck.ibm on IBM. The deck must be used on NCAR's computers. The deck assumes that you can rcp files from NCAR's computer to your local computer. Therefore you must have a .rhosts file on your local computer to allow rcp. If you run this deck from Chipeta (a Cray machine at NCAR), you must include the following line in your local copy of .rhosts:
chipeta.ucar.edu your-Cray-login-name
If your job is successful, you should receive the following files, for example, for the SOC case:
-rw-r--r-- 1 mesouser users
290160 Jul 2 1999 SFCNNRP_ICECsfc.9303
-rw-r--r-- 1 mesouser users
290160 Jul 2 1999 SFCNNRP_LANDsfc.9303
-rw-r--r-- 1 mesouser users
3647088 Jul 2 1999 SFCNNRP_PRESsfc.9303
-rw-r--r-- 1 mesouser users
1116000 Jul 2 1999 SFCNNRP_SOILWdlr.10.9303
-rw-r--r-- 1 mesouser users
1116000 Jul 2 1999 SFCNNRP_SOILWdlr.200.9303
-rw-r--r-- 1 mesouser users
2437872 Jul 2 1999 SFCNNRP_SPFHhag.2.9303
-rw-r--r-- 1 mesouser users
1655568 Jul 2 1999 SFCNNRP_TMPdlr.10.9303
-rw-r--r-- 1 mesouser users
1639744 Jul 2 1999 SFCNNRP_TMPdlr.200.9303
-rw-r--r-- 1 mesouser users
1655568 Jul 2 1999 SFCNNRP_TMPdpl.300.9303
-rw-r--r-- 1 mesouser users
3085344 Jul 2 1999 SFCNNRP_TMPhag.2.9303
-rw-r--r-- 1 mesouser users
3087600 Jul 2 1999 SFCNNRP_TMPsfc.9303
-rw-r--r-- 1 mesouser users
2530368 Jul 2 1999 SFCNNRP_UGRDhag.10.9303
-rw-r--r-- 1 mesouser users
2528112 Jul 2 1999 SFCNNRP_VGRDhag.10.9303
-rw-r--r-- 1 mesouser users
4486320 Jul 2 1999 SFCNNRP_WEASDsfc.9303
-rw-r--r-- 1 mesouser users
1893408 Jul 3 1999 pgb.f0093031300
-rw-r--r-- 1 mesouser users
1888152 Jul 3 1999 pgb.f0093031306
-rw-r--r-- 1 mesouser users
1892094 Jul 3 1999 pgb.f0093031312
-rw-r--r-- 1 mesouser users
1897350 Jul 3 1999 pgb.f0093031318
-rw-r--r-- 1 mesouser users
1903920 Jul 3 1999 pgb.f0093031400
Note that you get 3D fields in the pgb* files for the time periods selected. But for the surface data, you get them for the entire month.
This dataset may be used to generate data for the MM5 run that uses the land-surface model option.
NCEP Eta Data (archived at about 40 km resolution)
Read about this dataset in this document. Full data description may be found at NCAR/SCD site.
At this time, there is no job deck to get this dataset. To obtain the data, do the following:
1. Go to ftp://ncardata.ucar.edu/datasets/ds609.2/inventories/eta.inv, and find out which G40xxx file contains the time period of your interest. Note that you should get both 3Danal and SFanal files.
2. On NCAR's Cray/IBM or other machines, obtain the files by using this command:
msread -f BI G40xxx /DSS/G40xxx
These files are very large in size and each contains a monthly data, so you may want to extract the files for your time periods first before you rcp or ftp back to your local computer.
3. To find out what are in these files, go to ftp://ncardata.ucar.edu/datasets/ds609.2/inventories/TARLIST/ and click on the corresponding G40xxx.tarlst.Z. Scroll down the list and find the files you need. You should obtain *.tm00 files from both 3D and SFC data.
Type the following to extract files from G40001, for example,
tar -xvf G40001 9706_3Danal/97062400.AWIP3D00.tm00
\
9706_3Danal/97062412.AWIP3D00.tm00 \
9706_3Danal/97062500.AWIP3D00.tm00
To the same for the surface data file.
4. rcp or ftp these files to your local computer.
This dataset may be used to generate data for the MM5 run that uses the land-surface model option.
ECMWF's TOGA Data (2.5 x 2.5 degree resolution)
Read about this dataset in this document. Full data description may be found at NCAR/SCD site.
To obtain TOGA data, use the job deck in REGRID/pregrid/toga directory: get_toga.deck on Cray, get_toga.deck.ibm on IBM or other NCAR SCD computers.
You can also get the data following these steps:
1. Go to the MSS-file-list on ftp site.
2. Find the file name(s) appropriate for your case (look for year and months). For example, volume name Y16337 is the one for the March 1993 SOC case.
3. Logon to NCAR's Cray/IBM or other computer, obtain the file using this command:
msread -f BI Y16337 /DSS/Y16337
4. rcp or ftp the file to your local computer.
ECMWF's Reanalysis Data (2.5 x 2.5 degree resolution)
Read about this dataset in this document. Full data description for surface and upperair data may be found at NCAR/SCD site.
To obtain this dataset, use the job deck in REGRID/pregrid/era: get_era.deck on Cray or get_era.deck.ibm on IBM. You must use the deck on NCAR's computers. Again, the deck assumes that you can rcp files from NCAR's computer to your local computer. Once the data are retrieved from the archive, they will be rcp'ed to your local computer as defined by the Host script variable in the deck.
If your job is successful, you should get the following data files for the SOC case:
-rw-r--r-- 1 mesouser users
99466016 Sep 11 12:42 ERA_GRIB_SFC.1993JAN00Z
-rw-r--r-- 1 mesouser users
99466016 Sep 11 14:22 ERA_GRIB_SFC.1993JAN06Z
-rw-r--r-- 1 mesouser users
99466016 Sep 11 13:19 ERA_GRIB_SFC.1993JAN12Z
-rw-r--r-- 1 mesouser users
99466016 Sep 11 13:03 ERA_GRIB_SFC.1993JAN18Z
-rw-r--r-- 1 mesouser users
77970704 Sep 11 12:34 ERA_GRIB_UPA.1993MAR00Z
-rw-r--r-- 1 mesouser users
77970704 Sep 11 14:21 ERA_GRIB_UPA.1993MAR06Z
-rw-r--r-- 1 mesouser users
77970704 Sep 11 13:13 ERA_GRIB_UPA.1993MAR12Z
-rw-r--r-- 1 mesouser users
77970704 Sep 11 12:49 ERA_GRIB_UPA.1993MAR18Z
Note that for upperair data (*UPA), you get the data for the periods selected for the month (i.e., all 00 UTC data are in file date-stamped with 1993MAR00Z), while for the surface fields (*SFC), you get files either date-stamped for Jan or July, since 6 monthly data are archived together.
Real-time data from NCEP
NCEP (US) provides a number of GRIB datasets
for North America and globe in real-time from their ftp site:
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/