Diagnostics of CESM Model NCL Post-process software Wen-Ien Yu.

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Presentation transcript:

Diagnostics of CESM Model NCL Post-process software Wen-Ien Yu

CAM POP2 Diagnostics of CESM Model CICE

The diagnostics package produces over 600 postscript plots and tables in a variety of formats from CESM (CCSM) monthly netcdf files. Climatological means for DJF, JJA, and ANN are used. The diagnostics package can be used to compare two model simulations or for comparing a model simulation to the observational and reanalysis data. Model output on gaussian or fixed grids can be used. The code has been tested on gaussian T31, T42, T85 and T170 grids and on fixed lat/lon grids. The diagnostics package is written completely in NCL (NCAR Command Language).

cam3_5_50_s01 vs cam3_5_49_s DJF Mean Surface Pressure cam3_5_50_s01 vs NCEP Reanalysis DJF Mean Zonal wind

cam3_5_50_s01 vs cam3_5_49_s01 Annual implied northward ocean heat transport cam3_5_50_s01 vs cam3_5_49_s mb zonal wind

CESM Post-Processing Utilities: Registration: (if you don’t have NCAR, NERSC, or NCSS account) CAM:

/home/comet/DIAGNOSTICS/ NCO: The netCDF Operators, or NCO, are a suite of programs known as operators. The operators facilitate manipulation and analysis of data stored in the self-describing netCDF format. Each NCO operator (e.g., ncks) takes netCDF input file(s), performs an operation (e.g., averaging, hyperslabbing, or renaming), and outputs a processed netCDF file.

NCL, a product of the Computational & Information Systems Laboratory at the National Center for Atmospheric Research (NCAR), is a free interpreted language designed specifically for scientific data processing and visualization. Numerous analysis functions are built-in NCL. NCL has robust file input and output. It can read and write netCDF-3, netCDF-4 classic, HDF4, binary, and ASCII data, and read HDF-EOS2,HDF- EOS5, GRIB1,GRIB2and OGR files (shapefile, MapInfo, GMT, TIGER). Overview: Getting Started: Examples: Functions: NCAR Command Language

Examples

; Calculate 200mb daily Stream Functkon begin ; load netcdf data in = addfile("/home/comet/NOAA_NCEP_NCAR/v_daily/vwnd.1983_1989.nc","r") in2 = addfile("/home/comet/NOAA_NCEP_NCAR/u_daily/uwnd.1983_1989.nc","r") nlat = 73 nlon = 144 ntim = 2557 ; : 6940 days v=in->vwnd u=in2->uwnd lon=in->lon lat=in->lat level=in->level time=in->time uvmsg = 1e+36 ; missing value of psi and vp matrix psi = new ( (/ntim,nlat,nlon /), float, uvmsg ) ; stream function vp = new ( (/ntim,nlat,nlon /), float, uvmsg ) ; velocity potential ; u, v => psi do i=0,ntim-1,1 uv2sfvpg ; form NCL website Functions end do ; output netcdf data system("/bin/rm -f /home/comet/NOAA_NCEP_NCAR/200psi.day.1983_1989.nc") ncdf = addfile("/home/comet/NOAA_NCEP_NCAR/200psi.day.1983_1989.nc","c") ncdf->lon=lon ncdf->lat=lat ncdf->time=time psi!0 = "time" psi!1 = "lat" psi!2 = "lon" psi&time = time psi&lat = lat psi&lon = lon = "200hPa Stream Function" ncdf->psi=psi end Stream Function from U, V netCDF files PS: For 14(supermic) and 15(GPU), please add export NCARG_ROOT=/usr/local/ & export NCARG_ROOT= /opt/ncl_ncarg520.intel_11/ respectively in ~/.bashrc.

; NCL Graphics Example load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl" load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl" begin in = addfile("/home/comet/NOAA_NCEP_NCAR/200psi.day.1983_1989.nc","r") psi = in->psi wks = gsn_open_wks("ps","example") ; open a workstation to draw graphics gsn_define_colormap (wks,"BlAqGrYeOrRe") ; choose colormap res = True ; plot mods desired = True ; turn on color = False ; no contour lines = True ; use full color map = False ; turn off box between colors = True = "PostDraw" ; draw lables over lines = "ManualLevels" ; manual levels = -1.25e+08 = 0 ; 1.2e+08 = 1e+07 = "Always" ; turn on tick marks = "Satellite" ; choose map projection = ; choose center lon = 30 ; choose center lat = 3.0 ; choose satellite view = True ; turn on continental outlines = True ; turn on lat/lon lines = "Stream Function Decenber 1st, 1983" ; add title = min(psi&lon) ; where to start x = max(psi&lon) ; where to end x etc = min(psi&lat) = max(psi&lat) map = gsn_csm_contour_map(wks,psi(0,:,:),res) end Ploting netCDF file

Thank You