RAMS Evaluation and Visualization Utilities (REVU)

Post Processing

Types of Post-Processing for NWP Results

• Visualization

• Evaluation / Verification

• Products for distribution

• Input to other application software

• Dispersion and photochemical models

• Scientific applications: hydrology, ocean, etc.

• Business applications: load forecasting, insurance, etc.

RAMS Post-processing

REVU - RAMS Evaluation and Visualization Utilities

• Visualization

• NCAR Graphics

• iVAN (interactive Visualization and Analysis package)

• GrADS

• Vis5D

• Verification - statistics and graphics

• Reformatting for other applications

RAMS/REVU Visualization

• NCAR Graphics

• 2-dimensional graphics

• Horizontal and vertical cross-sections of numerous basic and derived variables

• Line, filled, and tile contours

• Wind vectors and streamlines

• Batch processing to produce plots

RAMS/REVU Visualization

iVAN - Interactive Visualization and ANanlysis

• Graphical User Interface (GUI) to NCAR Graphics

• Interactively produce and view graphics

• Mouse actions to zoom, select variables, grids, cross-sections

RAMS Visualization - iVAN

RAMS/REVU VisualizationGrADS

• Distributed by COLA (near Washington, DC)

• 2-dimensional graphics

• Command line interface, not very good GUI

• Linux, Windows, Unix support

• Has RAMS projection, but it doesn’t work

• No terrain-following coordinates

• Horizontal and vertical interpolation necessary

RAMS/REVU VisualizationVis5D

• Distributed by University of Wisconsin-Madison

• 3-dimensional graphics

• Not very good GUI (my opinion!)

• Executables and source; Linux, Windows, Unix support

• Has RAMS projection, but it doesn’t work

• No terrain-following coordinates

• Horizontal and vertical interpolation necessary

RAMS/REVU Visualization

Numerous other commercial packages

• AVS

• PV-Wave

RAMS/REVU Verification• Produces statistics and graphics comparing forecast results

with observations

• Numerous statistics at surface, sigma-z, pressure, or Cartesian levels

• Graphics include numeric difference plots, wind barb comparison, time series (NCAR Graphics)

• Uses “data grabber”, 4-dimensional interpolation to specific location

RAMS/REVU Output processingReformatting for other applications

• Basic and derived variables

• Subsets, gridded or profiles

• Code must be modified

REVU 2.3.1(and 2.5)

• Started life as an AVS module• Grew into a monster!!!!• Tried to do everything in a single code, even

marginally related things like statistics• Plotting option settings in namelist became

cryptic• Code virtually impossible to maintain…• …and we still want to add more features!

The New REVU Suite

• Split REVU into several different executables which share common code:– REVU-pl – plotting– REVU-gr – grabbing– REVU-rf – reformat– REVU-st – statistics

• Some versions will be available for RAMS v6.0 by the end of the year

REVU_IN – SPACE

$CONTROL

ANPREF='anal/a-A', ! Prefix for the file names

REVPREF='./', ! Prefix for output file names

ANATYPE='SPACE', ! Type of run

HEAD1='NY Test Run', ! Header line

REVU_IN – SPACE (cont.)

IGRID(1)=1, ! Grid(s)

IZTRAN(1)=1, ! If horizontal slab

! 1= terrain-following surface

! 2= interpolate to Cartesian surface

! 3= interpolate to pressure surface

IPLEVEL(1)=700, ! If pressure surface, pressure level in mb

! Level must be one of the mandatory levels:

! 1000,925,850,700,500,400,300,250,200,150,100

MAPFILL=3, ! Map background

IBACKGND=1, ! Background color

IPLTINFO=1, ! Information table

IPANEL=1, ! Plots per panel

REVU_IN – SPACE (cont.)

! Landmarks

LANDMARK(1)='/M1:b.03:t2:s1.:xgray/L1:s.01:xgray/',

! Re-map colors

COLORS(1)='/axis:lightgray/title0:rgb:.8:.8:.8/',

! Frame specification

TVAR(1)='/F/1:9:1/', ! time

ZVAR(1)='/F/2:2:1/', ! z coord

YVAR(1)='/V/0:0:1/', ! y coord

XVAR(1)='/H/0:0:1/', ! x coord

REVU_IN – SPACE (cont.)

! Parameters

CFRAME_A(1)='/tempc/fb/10./30./1./m5:c20.:xgray/red/blue/',

CFRAME_B(1)='/b/1/1/3/darkgreen/',

CFRAME_C(1)='/tke/fb/.7/1./.05/m6:xgray/darkgreen/midgreen/',

CFRAME_A(2)='/relhum/fb/50./100./5./m2:xblue/lightblue/',

CFRAME_C(2)='/precip/fb/1./8./1./m2:c0.:xdarkgreen/green/',

CFRAME_A(3)='/precip/fb/1./8./1./m6:c0.:xorange/yellow/midgreen/',

CFRAME_A(4)='/dewptc/fb/10./30./1./m5:c20.:xgray/red/blue/',

CFRAME_B(4)='/v/1/1/1/yellow/2./',

CFRAME_C(4)='/speed/vb/0./8./1./m6:c5./yellow/darkgreen/',

$END

REVU_IN – V5D (GrADS)

$CONTROL

ANPREF='anal/a-A', ! Input filename prefix

REVPREF='./', ! Output filename prefix

ANATYPE='V5D', ! Type of run (GRADS)

IGRID(1)=0, ! Grid(s)

IZTRAN(1)=3, ! If horizontal slab

! 1= terrain-following surface

! 2= interpolate to Cartesian surface

! 3= interpolate to pressure surface

REVU_IN – V5D (cont.)

! Frame specification

TVAR(1)='/F/1:9:1/', ! time

ZVAR(1)='/F/0:0:1/', ! z coord

YVAR(1)='/V/0:0:1/', ! y coord

XVAR(1)='/H/0:0:1/', ! x coord

! Parameters

CFRAME_A(1)='/u/',

CFRAME_A(2)='/v/',

CFRAME_A(3)='/w/',

CFRAME_A(4)='/tempk/',

CFRAME_A(5)='/dewptk/',

$END

REVU_IN – V5D (cont.)

$GLL

IGRIDLL=1, ! Lat-long grid specification

! 0= specified below

! 1= fits within RAMS grid

! 2= contains the full RAMS

GLLDLLAT=1., ! latitude grid point spacing

GLLDLLON=1., ! longitude grid point spacing

GLLWLON=-66., ! western edge of grid

GLLELON=-37., ! eastern edge of grid

GLLSLAT=-37., ! southern edge of grid

GLLNLAT=-15., ! northern edge of grid

$END