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To “run” an NCL script: • [Install NCL and set up environment, covered later] • [Make sure you have “~/.hluresfile”] • Create a file using a UNIX editor that contains NCL script commands, say, “myfile.ncl” • Run the file on the UNIX command line with: ncl myfile.ncl • View output or graphical file NCL & WRF-NCL � WRF User’s User s Event � June 22-25, 2010
load “$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl” load “$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl” begin begin/end are optional print(“Hello, world”) Open the file This is like doing an “ncdump –h” Comments begin with “;” Either on line by itself, or end of line ; Open a netCDF file and print its contents f = addfile(“wrfout_d01_2000-01-24_12:00:00.nc”,”r”) print(f) ; Read a variable and print its info slp = wrf_user_getvar(f,”slp”,0) printVarSummary(slp) array arithmetic, like f90 Retrieves WRF variable Use print/printVarSummary for debugging wrf_smooth_2d( slp, 3 ) ; Smooth slp td2 = wrf_user_getvar(f,”td2”,0) ; td2 in C td_f = 1.8*td2+32. ; Convert to F td_f@description = “Surface Dew Point Temp” td_f@units = “F” . . . Maybe To run this do script some (“wrf.ncl”) plotting. on UNIX . . command line, type: end ncl wrf.ncl
Page 1 and 2: Post-processing WRF-ARW Data with t
Page 3 and 4: • Overview • NCL basics • Fil
Page 5 and 6: WRF-NCL A suite of analysis and vis
Page 7 and 8: NCL: File input and output • Data
Page 9: NCL: Visualization • High-quality
Page 22 and 23: A T-S diagram is a graph showing th
Page 24 and 25: Based on a visualization of Adam Ph
Page 26 and 27: John Fasullo, NCAR/CGD
Page 29 and 30: CCMVal Workshop 2009 � June 1-5,
Page 31: • Overview • NCL basics • Fil
Page 35 and 36: Mixing types ; Mixing types, “lar
Page 37 and 38: Arrays • Row major. . . like C/C+
Page 39 and 40: Special functions for arrays ; Very
Page 41 and 42: Missing values (_FillValue attribut
Page 43 and 44: File and variable attributes ; Use
Page 45 and 46: Array reorder, reshape, reverse ; R
Page 47 and 48: Array index subscripting, : and ::
Page 51 and 52: KHDIF : 0 KVDIF : 0 MP_PHYSICS : 3
Page 53 and 54: float V ( Time, bottom_top, south_n
Page 55 and 56: Back to NCL scripts: Two ways to re
Page 57 and 58: Reading (and examining) a variable
Page 59 and 60: Creating a new variable & adding at
Page 62 and 63: WRF-NCL built-in functions Can use
Page 64 and 65: Other WRF-NCL “WRFUserARW.ncl”
Page 66 and 67: Other WRF-NCL “WRFUserARW.ncl”
Page 68 and 69: Modifying wrf_user_getvar function
Page 70 and 71: Step-by-step WRF-ARW visualizations
Page 72 and 73: NCL & WRF-NCL � WRF User’s User
Page 75 and 76: wrf_contour/wrf_vector Create line/
Page 77 and 78: wrf_map_overlays/wrf_overlays Overl
Page 79 and 80: http://www.mmm.ucar.edu/wrf/OnLineT
Page 83 and 84:
Example F77 code: myTK.f C NCLFORTS
Page 85 and 86:
Calling Fortran 90 codes from NCL
Page 87 and 88:
Example F90 code: myTK.f90 + stub m
Page 89 and 90:
• Overview • NCL basics • Fil
Page 91 and 92:
Debugging tips • Start with an ex
Page 93 and 94:
• Overview • NCL basics • Fil
Page 95 and 96:
Customizing your NCL graphics envir
Page 97 and 98:
With and without a “.hluresfile
Page 99 and 100:
Useful URLS • Online WRF-NCL Grap
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ppt - MMM - UCAR

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