Below is an excerpt from my weather file for the FACE studies in Arizona

with CO2=550ppm.  ~Kelly



*WEATHER : MARICOPA, ARIZONA, U.S.A from AZMET

@ INSI      LAT     LONG  ELEV   TAV   AMP REFHT WNDHT   CO2

  MCAZ   33.069 -111.972   361  22.0  22.0   1.5   3.0   550

@DATE  SRAD  TMAX  TMIN  RAIN  DEWP  WIND

87001  11.9  18.2  -1.7   0.0   0.1 129.6

87002  11.7  18.7  -0.6   0.0   0.1 129.6

87003  12.7  20.7  -2.5   0.0  -2.2 155.5





-----Original Message-----

From: civil35 sarika <[log in to unmask]>

To: [log in to unmask]

Subject: Request for how to change CO2 values

Date: Tue, 14 Apr 2015 22:34:02 +0530



Hello,



         For crop modeling , I need to provide DSSAT CERES-Rice model

with CO2 levels from different scenarios.



         There appears to be an option in the File X simulation controls

to let CO2 be read from the weather file when the switch is set to

"W".However, looking through associated documentation (weather.cde,

DSSAT manuals, source code for CO2val.for), I don't see how one provides

CO2 as a variable in the .WTH file.I have tried entering a "CO2"

 variable in a .WTH file also, but the model doesn't take it and

defaults to the 380 ppm value.







Thank you





-- 

                                                                                With Regards;

                                                                                M.Sarika,

                                                                                Roll No - 13WR09F,

                                                                                Water Resources Engg,

                                                                                M. Tech, NITK Surathkal.

                                                                                +919892729558

                                                                                +919494343019