Hello All,

I am plotting monthly and seasonal precipitaion , circulation field(200,850).

These are the step(Given below) i am following for plot like precipitation and vector wind.

Let me correct , if i am missing something for correct plot.

I need help on how to plot geopotential height(monthly and seasonal) and give the idea(with example) .

Please help me regarding the above problem.

ga-> open ATM.2005060100.ctl
Scanning description file: ATM.2005060100.ctl
Data file ATM.2005060100 is open as file 1
LON set to 49.4242 111.019
LAT set to -10.48 39.77
LEV set to 1008.43 1008.43
Time values set: 2005:6:1:6 2005:6:1:6
E set to 1 1
ga-> open ATM.2005070100.ctl
Scanning description file: ATM.2005070100.ctl
Data file ATM.2005070100 is open as file 2
ga-> open ATM.2005080100.ctl
Scanning description file: ATM.2005080100.ctl
Data file ATM.2005080100 is open as file 3
ga-> open ATM.2005090100.ctl
Scanning description file: ATM.2005090100.ctl
Data file ATM.2005090100 is open as file 4

Define function

1)- precipitation

ga-> define r1=ave(tpr.1,t=1,t=120)*30/10
Averaging. dim = 3, start = 1, end = 120
Define memory allocation size = 133584 bytes
ga-> define r2=ave(tpr.2,t=120,t=244)*31/10
Averaging. dim = 3, start = 120, end = 244
Data Request Warning: Request is completely outside file limits
Entire grid contents are set to missing data
Grid limits of file: X = 1 138 Y = 1 121 Z = 1 23 T = 1 124 E = 1 1
Grid limits of request: X = 1 138 Y = 1 121 Z = 1 1 T = 0 0 E = 1 1
Warning issued for variable = tpr.2
Define memory allocation size = 133584 bytes

ga-> define r3=ave(tpr.3,t=244,t=368)*31/10

...

ga-> define r4=ave(tpr.4,t=368,t=488)*30/10

ga-> define r=(r1+r2+r3+r4)

2) vector wind

ga-> define u1=ave(u.1,t=1,t=120)

ga-> define v1=ave(v.1,t=1,t=120)

ga-> define u2=ave(u.2,t=120,t=244)

ga-> define v2=ave(v.2,t=120,t=244)

ga-> d skip(u1,5,5);v1

...

ga-> define u=(u1+u2+u3+u4)

ga-> define v=(v1+v2+v3+v4)

Waiting for your necessary suggestion on it.

Thanks
Rajesh Kumar Maurya
M.Sc(Tech)- Geophysics(Meteorology); Junior Research Fellow & Research Scholar
Department of Geophysics
Banaras Hindu University
Varanasi 221005