There are now two diagnostics packages available. The first, and older, package
provides diagnostics of the climatological monthly means. The second package
provides some diagnostics of the variability.
Diagnostics of Climatological Monthly Means
LAST UPDATE: 08/19/04
diagnostics package first began life as the WGNE diagnostics package.
Sylvia Murphy created the first version of the diagnostics in 1999. I started work
on an extended version (now called the AMWG diagnostics) in the fall of 2000.
The diagnostics package is written completely in NCL (NCAR Command Language).
The AMWG diagnostics package produces over 600 postscript plots and tables in
a variety of formats from CCSM (CAM) monthly netcdf files. Climatological means for
DJF, JJA, and ANN are used. The diagnostics package can be used to compare two
CCSM (CAM) 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.
Included in the package are HTML files which provide the infrastructure for a
basic website for the display of all your plots and tables. The c-shell script
(see below) now has a switch for creating webpages automatically. When this
is used the end result of running the script is a tar file of all the plots in gif, jpg
or png format and the needed html files organized in the proper subdirectories.
The user can then untar this file in a directory of their choosing and create a link to it.
Examples of the webpages created by the diagnostics package
Model fields compared with observational data plots
Comparison of two different models plots
Plot Types Included
Tables of global and regional means (set 1)
Implied meridional ocean heat and freshwater transport (set 2)
Line plots of zonal means (set 3)
Latitude vs pressure/height zonal mean contour plots (set 4)
Longitude vs latitude 2D-field contour plots (set 5)
Longitude vs latitude 2D-vector field contour plots (set 6)
Longitude vs latitude polar 2D-field contour plots (set 7)
Month vs latitude zonal mean contour plots (set 8)
Longitude vs latitude DJF-JJA contour plots (set 9)
Annual cycle line plots of global means (set 10)
Miscellaneous plot types (set 11)
Vertical profiles at 56 raobs stations around the globe (set 12)
ISCCP cloud types from the ISCCP cloud simulator (set 13)
Plots of statisitcal significance for sets 5 and 7
Plots with paleoclimate coastlines using the orography field
Three possible color schemes for the contour plots
Default amwg colors color bar
Blue and red colors color bar
Blue, yellow and red colors color bar
Obs/Reanalysis Comparison Datasets
NCEP reanalysis 1979-1998 (16 variables)
ECMWF reanalysis 1979-1993 (13 variables)
RAOBS vertical profiles (T,Q,H)
GPCP precip rate 1979-2002
CMAP (Xie-Arkin) precip rate 1979-1998
CMAP PREC/L land surface precip rate 1948-2001
NVAP water vapor, cloud liquid water 1988-1999
SSM/I (Wentz) precip rate, water vapor, cloud liquid water 1987-2000
MODIS precipitable water, cloud liquid water
SMMR & SSM/I sea ice concentration 1979-1999
TRMM merged rain rate (3B-43) 1998-2003
ERS 1/2 scatterometer surface stress 1992-2000
ERBE fluxes, cloud forcings 1985-1989
CERES (5 variables) 2000-2002
IPCC/CRU surface air temperature 1961-1990
HadISST sea surface temperature and sea ice concentration 1982-2001
LEGATES surface temperature, precip rate 1920-1980
WILLMOTT land surface temperature and precipitation 1950-1999
ISCCP D1, D2 cloud cover (high,low,mid,total) 1983-2001
ISCCP FD surface fluxes 1983-2000
WARREN surface OBS cloud cover (low,total)
Users with NCAR Accounts
Users with accounts on DAVE and dataproc can use the diagnostics by copying
the top-level c-shell script diag040819.csh from /ccsm/atm/DIAG/code/.
Users with accounts on the CGD Suns, and local Linux systems that mount
/fs/cgd/data0 can use the diagnostics by simply downloading the top level
c-shell script diag040819.csh or by copying it from /fs/cgd/data0/stevens/DIAG/code/.
Read the instructions in the file and make any needed changes. Example of the
user modify section of diag040819.csh. Once you have modified the file,
make it executable and then run it. IT'S THAT SIMPLE!
Other Users Get the Code and Datasets FREE
Other users of the diagnostics must have NCL, and the netcdf operators
(NCO) already installed on their computer system. The complete package
of NCL and HTML code is available as a gzipped tar file (~630KB).
You will also need the utility "convert" to convert the postscript plots to
an image format suitable for the webpages (png,gif,jpg). Convert is part of
the ImageMagick package.
Download the observational datasets
You can download the observational datasets used to compare
with model data via our anonymous ftp site. The file is about 116 MB.
>login using "anonymous" and your email address
To install the code gunzip/untar the diag.code.tar.gz file in a diagnostics directory
you have created (example /usr/local/DIAG/). This will create the subdirectories
/code and /html. In the same directory gunzip/untar the diag.obs_data.tar.gz file, this
will create the /obs_data subdirectory. In the /code subdirectory you will find the
diag040819.csh file. Read the instructions in the file and make any needed changes.
Please let me know if you download and install the package so I can keep
you informed about future updates.
Mark Stevens (firstname.lastname@example.org)
Climate and Global Dynamics Division
National Center for Atmospheric Research