ppt - MMM - UCAR

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More about NCL • Similar to Python or IDL • Tailored to climate and atmospheric sciences • Has variable types, “if-then-endif”, “do” loops, arithmetic operators • F90-like array arithmetic that will ignore missing values • Can call your own Fortran 77/90 or C routines • Simple, robust file input/output • Hundreds of data analysis routines • Publication-quality graphics that are highly customizable
NCL: File input and output • Data model based on netCDF model (metadata describes data) • One function reads all supported data formats: − NetCDF, GRIB 1 and 2, HDF4, HDF-EOS2, shapefiles, (new: HDF-EOS5) (next release: HDF5) − Writes NetCDF and HDF4 (compressed NetCDF too) • OPeNDAP-enabled client available • ASCII, binary (read and write) http://www.ncl.ucar.edu/Applications/list_io.shtml
Page 1 and 2: Post-processing WRF-ARW Data with t
Page 3 and 4: • Overview • NCL basics • Fil
Page 5: WRF-NCL A suite of analysis and vis
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 33 and 34: load “$NCARG_ROOT/lib/ncarg/nclsc
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 81 and 82:
• Overview • NCL basics • Fil
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:
Page 91 and 92:
Debugging tips • Start with an ex
Page 93 and 94:
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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