[gradsusr] NINO regions

[nitin patil]

Dear Maria this may help you to calc nino ares,

'reinit'
'clear'
'sdfopen /home/abc.nc'
'set t 1 12'
'set lat -30 30'
'tmean=ave(tos,t+1452,t=1812,12)'
'modify tmean seasonal'
'set gxout fwrite'
'set fwrite /home/emi.grd'
'Set t 1453 1812'
'ta=(tos-tmean)'
'set x 1'
'set y 1'

'iod=aave(ta,lon=160,lon=210,lat=-5,lat=5)'
*above is NINO4 index
'iod=aave(ta,lon=210,lon=270,lat=-5,lat=5)'
*above is NINO3 index
'iod=(aave(ta,lon=50,lon=70,lat=-10,lat=10)-aave(ta,lon=90,lon=110,lat=-10,lat=0))'

*above is iod mode index
'iod=aave(ta,lon=190,lon=240,lat=-5,lat=5)'
*above NINO3.4 index

'set t 1'
xx=1453
while (xx<1812)
x1=xx+5
x2=xx+8
'set t 'xx
'sxx0=ave(iod,t='x1',t='x2')'
'set gxout fwrite'
'd sxx0'
xx=xx+12
endwhile
'disable fwrite'


-- 
Regards,
Mr. Nitin Patil
Research Fellow, Long Range Forecasting Division,
National Climate Centre,
India Meteorological Department,
Pune - 411005, INDIA.
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