hovmoller question

Charles Seman Charles.Seman at NOAA.GOV
Tue Jul 15 10:42:25 EDT 2008


Please find attached a script pptn_climo_Hovmuller.gs and a sample plot
which I hope will help... Please let me know if you have any questions
about the script...


Teddy Allen wrote:
> Dear GrADS community,
> I am a new GrADS user and am progressing quickly with the software thanks to the generosity of this group and the supporting documentation. However, I am currently stuck on one application that I just can't seem to figure out.
> I would like to create a shaded Hovmoller plot that describes monthly average values along the y-axis (12 tics) and longitude along the x-axis. I am using the GPCP monthly dataset and can easily generate a plot describing all of the years of the dataset along the y-axis (29 years), but can't seem how to figure out how to average the dataset to display monthly climatologies.  Any suggestions on how to display monthly averages along the y-axis on a hovmoller plot?
> Below is my script for the hovmoller plot describing all of the years along the y-axis. I am using GrADS NC version 1.8SL11 on a windows computer.
> 'reinit'
> 'sdfopen c:\testdata\netcdf\precip.mon.mean.nc'
> 'set grid off'
> 'set grads off'
> 'set gxout shaded'
> 'set t 253 348'
> *time above displays GPCP years from 2000-2007
> 'set y 1'
> 'set lon 270 300'
> 'set clevs 0 .5 1 1.5 2 2.5 3 3.5 4 4.5 6 6.5 7 7.5 8 8.5 9'
> 'set grads off'
> 'set yaxis 253 348 4'
> 'set csmooth on'
> 'd ave(precip,lat=15,lat=17)'
> 'draw xlab longitude'
> 'draw ylab time'
> 'draw title Meridional Average (lat=15N-20N) of GPCP 2000-2007'
> 'cbarn'
> 'print'
> 'disable print'
> Thank you very much for your help.
> Sincerely,
> teddy allen
> To move quickly, go alone. To move far, go together. --- African Proverb


Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."

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