[gradsusr] ENSO Forecast Plumes Script

[Jennifer M Adams]

I use the ‘dtype netcdf’ descriptor to make sure the dimensions are mapping properly, set the ensemble names with leading zeros, and alias the variable name so the plume script will work with new and old data.

dset ^NASA_GEOS5v2.tmpsfc.201806.anom.nc
dtype netcdf
options yrev
undef 9.999E+20
title NASA_GEOS5v2 anomalies for tmpsfc initialized Jun 2018
ydef 181 linear -90 1
xdef 360 linear 0 1
zdef 1 linear 1 1
tdef 9 linear 01Jun2018 1mo
edef 10 names 01 02 03 04 05 06 07 08 09 10
vars 1
fcst=>tmpsfc 0  e,t,y,x    surface temperature [K]
endvars

—Jennifer


On Jun 26, 2018, at 3:59 PM, James Spinks <jspin881 at hotmail.com<mailto:jspin881 at hotmail.com>> wrote:

Hey Jennifer,

Thanks. You're right. After downloading the data in netcdf format, the files opened with no problem. What would I use the descriptor file if the nc files open without it? Just curious.

I'll give your suggestions a try. Thanks for the help.
From: gradsusr <gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org>> on behalf of Jennifer M Adams <jadams21 at gmu.edu>
Sent: Tuesday, June 26, 2018 3:00 PM
To: GrADS Users Forum
Subject: Re: [gradsusr] ENSO Forecast Plumes Script

Hi, James —
The data I use to draw the plumes is freely available from NOAA:

ftp://ftp.cpc.ncep.noaa.gov/wd52dg/data/indices/sstoi.indices  (for the obs)
ftp://ftp.cpc.ncep.noaa.gov/NMME/realtime_anom (for the model forecasts)

You will need to download the data and create your own descriptor files, but that is a very straightforward task — no special tricks. Recently the format of the model data changed -- now it is NetCDF instead of GRIB — which makes it even easier. Below is the bit of script code for writing the ascii data as a binary time series:

'set gxout fwrite'
t=0
while (1)
  res=read(ascfile)
  line1=sublin(res,1)
  line2=sublin(res,2)
  rc1 = subwrd(line1,1)
  if (rc1); break; endif
  ck=subwrd(line2,1)
  if (ck!='YR')
    t=t+1
    year=ck
    m=subwrd(line2,2)
    val=subwrd(line2,10)
    'd 'val
    if (t=1)
      iyear=year
      imon=subwrd(mons,m)
    endif
  endif
endwhile
'disable fwrite'


—Jennifer

On Jun 26, 2018, at 10:40 AM, James Spinks <jspin881 at hotmail.com> wrote:

Hi all,

I was wondering if there was an updated link for the ENSO Forecast Plumes script since the URL http://monsoondata.org:9090/dods/ has been decommissioned.

The script is hosted here http://cola.gmu.edu/enso_forecast_plumes.html and looks to still be running just fine, but the script does not contain an updated link. If there is a replacement link, can some please provide the new link.

Thank you,
James
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--
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
George Mason University



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--
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
George Mason University



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