Grid informations

Because every model has its own grid you need grid description files for every area and every model. Load down a .tar file containing all the grid descriptions here:

IPCCDDC2.grid.tar.gz

 

 

Example for a grid description:

%cat EUROPE2_MPEH5_griddes.txt

#

# gridID 0

#

gridtype : gaussian # it's a regular grid were the latitudes are defined as "gaussian quadratures"

gridsize : 1392 # number of gridpoints

xname : lon

xlongname : longitude

xunits : degrees_east

yname : lat

ylongname : latitude

yunits : degrees_north

xsize : 58 # number of horizontal gridpoints

ysize : 24 # number of vertical gridpoint (xsize * ysize = gridsize)

xfirst : -48.75 # 1. most western gridpoint

xinc : 1.875 # increment (xfirst + xinc = xsecond etc)

yvals : 30.7767441 32.6419944 34.5072433 36.3724906 38.237736 40.1029793 41.9682203

43.8334586 45.6986939 47.5639257 49.4291537 51.2943771 53.1595954 55.0248075

56.8900126 58.7552093 60.6203959 62.4855705 64.3507304 66.2158721 68.080991

69.9460806 71.8111321 73.6761323

 

Because of the gaussian quadrature the yvals are not equidistant and must be listed. (from south to north)!

 

For visualisation of the data in GrADS you need a .ctl and .gmp file for grid informations (.ctl) and

the index file (.gmp). Because the index file may change for each data file we created these files for

all data files in the DDC DVD distribution. They have their place in a similar directory tree as the

data files. For use the three files must be in the same directory.

You can download the ctl-gmp archive from our ftp server.

Connect with

ftp ftp.dkrz.de

login with

anonymous and use your email adress as a password.

change to the directory

/pub/Outgoing/luthardt

and download the file with

get ctl_gmp2.tar.gz

quit the ftp connection and unpack the file.

Please notice that files on our ftp server will be deleted after one week, so mail us a request for these data sets and we'll reload.