Changes between Version 4 and Version 5 of FpInputMetGfs


Ignore:
Timestamp:
Nov 3, 2014, 5:29:53 PM (6 years ago)
Author:
saeck
Comment:

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  • FpInputMetGfs

    v4 v5  
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    5 ''This description is kindly provided by Jooil Kim and Bob Dattore (NCAR).''
     5''This description is kindly provided by Jooil Kim and Bob Dattore (NCAR) and updated by Michael Schoeppner.''
    66
    77Now there exists a well-managed source of archived windfields from NCEP for use with FLEXPART. Here are the instructions:
     
    1111  2. Log in with your ucar account (create one for free if you don't have one yet)
    1212
    13   3. Go to  "'''Data Access'''" -> "'''Internet Download'''"  -> "'''Request a Subset with Format Conversion'''". This opens  a window for choosing a customized subset of the CFSR data.
     13  3. Go to  "'''Data Access'''" -> "'''Customizable Data Requests'''"  -> "'''Get a Subset'''". This opens  a window for choosing a customized subset of the CFSR data.
    1414
    15   4. Choose your time period, and select "'''FLEXPART Model Input - 6-hour Forecasts'''" under the oarameter '''presets'''. When done, press the "'''Continue'''" button on the bottom of the page.
     15  4. Choose your time period, and select "'''FLEXPART Model Input - 6-hour Forecasts'''" under the parameter '''presets'''. When done, press the "'''Continue'''" button on the bottom of the page.
    1616
    17   5. On the next window, look for the "'''Type of Product'''" menu and select "''all available''", then press the "'''Click Here'''" button to update. Doing this will give you the analysis (H+0) and H+1 to H+6 forecast fields. When done, push the "'''Submit Request'''" button.
     17  5. On the next window, look for the "'''Type of Product'''" menu and select "''all available''", then press the "'''Click Here'''" button to update.  . Select all from 1-hour Forecast to 6-hour Forecast in the type-of-product list. For some time periods (e.g. most recent), these may not be available; however, Flexpart might also work with lower time resolution files. Important note: Make sure that under "'''More date/time options'''" the box "'''Split output files into one timestep per file'''" is checked. When done, push the "'''Submit Request'''" button.
    1818
    1919  6. You will receive an e-mail from UCAR when the data is ready. Follow instructions on the e-mail regarding ways to download the data.
     
    2323
    2424Getting the data into FLEXPART
     25
     261.     The received files should be in the format 201001011300.pgbh01.gdas.20100101-20100105.grb2. Make sure the data is not in format pgbh02.gdas.20100101-20100105.grb2 without the date/time in the beginning. If this is the case, you probably did not check the “Split output files into one timestep per file” box.
     27
     282.     In case you also downloaded the analysis data (labeled "pgbhnl"): It does not include all of the surface variables like 2 m temperature and 10 m winds, and so can't be used in FLEXPART. Use the 6 h forecast files (labeled “pgbh06”) instead to cover the time steps 00 06 12 and 18. See also the example for the AVAILABLE file below.
     29
     303.     The files that you want to use in Flexpart have to be listed in the AVAILABLE file like this
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     32 
     33
     34DATE     TIME         FILENAME     SPECIFICATIONS
     35
     36YYYYMMDD HHMISS
     37
     38________ ______      __________      __________
     39
     4020100101 000000      201001010000.pgbh06.gdas.20091226-20091231.grb2      ON DISC
     41
     4220100101 010000      201001010100.pgbh01.gdas.20100101-20100105.grb2      ON DISC
     43
     4420100101 020000      201001010200.pgbh02.gdas.20100101-20100105.grb2      ON DISC