To output a field, the body of the postcntrl.xml file needs to contain an entry for the appropriate variable and include at least the shortname, pname, level, and scale, with additional tags as deemed necessary. If a field is not in your postcntrl.xml but it is available for output, you may simply copy that parameter from the post_avblflds.xml.

Controlling which levels unipost outputs

GRIB2 file names on the NWS ftp server will remain the same as the GRIB1 file names, but the GRIB2 files are stored in new uniquely named subdirectories. However, the GFS 1.0 deg files are an exception; the GRIB2 version will be named fh.HHHHtl.pressgr.1p0deg instead of fh.HHHHtl.pressgr.onedeg.

To modify which levels to output, the values in the level tag will need to be edited to reflect the desired output levels for that variable. F1 2013 game for mac free download. If the variable is defined over a specific layer, then both the level (first level of the layer) and level2 (second level of the layer) tags will need to be edited.

The list below details which variables are available for output for a variety of fields.

  • For isobaric output, 47 levels are possible from 2 to 1000 hPa (2, 5, 7, 10, 20, 30, 50, 70 mb and then every 25 from 75 mb to 1000 mb). Modifications to which isobaric levels are possible can be made in /UPPV4.1/src/unipost/CTLBLK.f.
    • Modify the variable LSMDEF to change the number of pressure levels in your array (e.g. LSMDEF=47)
    • Modify the SPLDEF array to change the values of pressure levels, i.e. (/200.,500..97500.,100000./)
  • For model-level output, all model levels are possible, from the highest to lowest
  • For soil levels, layers or levels depend on your LSM:
    • Noah LSM soil layers are 0-10, 10-40, 40-100, and 100-200 cm.
    • RUC LSM soil levels are 0, 1, 4, 10, 30, 60, 100, 160, and 300 cm. For the RUC LSM, it is necessary to turn on 5 additional levels in the wrf_cntrl.parm to output 9 instead of 4. (For the old RUC LSM, there are only 6 layers, and if using this, you will need to change RUC LSM from 9 to 6 in the WRFPOST.f routine).
    • Pliem-Xiu LSM layers are 0-1 and 1-100 cm.
  • For low, mid, and high cloud layers, the layers are ≥642 hPa, ≥350 hPa, and <350 hPa, respectively.
  • For PBL layer averages, the levels correspond to 6 layers with a thickness of 30 hPa each.
  • For flight levels, the levels are 30, 50, 80, 100, 305, 457, 610, 914, 1524, 1829, 2134, 2743, 3658, 4572, 6000 and 7010 m.
  • For AGL radar reflectivity, the levels are 4000 and 1000 m.
  • For surface or shelter-level output, specify the surface level for the particular variable.

For a list of available fields for GRIB2, see the GRIB2 Table

from ncepgrib2 import Grib2Decode
#get info about grib2 section specifications
print grb


center_wmo_code = kwbc
data_representation_template = [1131507924 -3 0 9 0 0 255]
discipline_code = 0
earthRminor = 6371229.0
grid_definition_template = [ 6 0 0 0 0 0 0 451 337 16281000 233862000 8 25000000 265000000 13545000 13545000 0 64 25000000 25000000 0 0]
Grib1
gridlength_in_x_direction = 13545.0

Grib1 To Grib2 Converter Box Wiring

has_local_use_section = False
identification_section = [ 7 0 2 1 1 2013 12 6 5 0 0 0 1]
Grib1
longitude_first_gridpoint = 233.862
originating_center = US National Weather Service - NCEP (WMC)
points_in_y_direction = 337
product_definition_template = [ 0 0 2 0 105 0 0 1 1 100 0 100000 255 0 0]
proj4_lat_0 = 25.0
proj4_lat_2 = 25.0
proj4_proj = lcc
shape_of_earth = Spherical
These values are important describe how the file is encoded and can be very useful for encoding a grib2 file for the first time (using an existing grib2 file as an example). If you do not want to print out the entire summary, you can print out each encoding separately. For example:
print 'grid id section:',grb.identification_section
would result in:

Read grib/grib2 with PyNIO

Reading grib/grib2 format data with PyNIO is very simple; it is exactly the same as reading netcdf data with PyNIO. The benefit of reading grib data with Nio versus using pygrib lies with the 'under-the-hood' capabilities of Nio that collect dimensions. That is, instead of reading one record/variable at a time as required by pygrib, Nio gathers all of those variables that have the same dimensions. For example, if you wanted the temperature for all pressure levels within a grib file, you would have to read in each temperature record at each level separately. With Nio, the levels would be gathered into one dimension

⇐ ⇐ Love Death 4 Realtime Lovers Download
⇒ ⇒ Psychology Book In Bengali Version Pdf To Word