negative TOTCO2

[Tom]

How can I perform runs in which COMNET of TOTCO2 is allowed to be negative to fulfil ambitious climate targets and to simulate net removals of CO2 from the atmosphere? How would this work with the climate module? 

Thanks and best,

Tom

[Antti-L]

Simply define a negative lower bound for VAR_COMNET(TOTCO2). It does work with the Climate Module. What do you mean by your question "How would this work with the climate module?"?

[Tom]

Thanks Antti,

I introduced a negative lower UC on COMNET of TOTCO2 but the Biomass CCS, which has negative FLO_EMIS for TOTCO2-Output does not gain to negative net emissions. It only removes CO2 until total CO2 balance is zero.

What could be the reason for this?

Thanks Tom

______

from lst:

     VAR VAR_UCRTS 

                                             LOWER          LEVEL          UPPER         MARGINAL               
AL_TOTCO2            .USA.2070.ANNUAL   -287500.0000    192698.1465        +INF            EPS        
AL_TOTCO2            .USA.2080.ANNUAL   -325000.0000     12641.3635        +INF            EPS        
AL_TOTCO2            .USA.2090.ANNUAL   -362500.0000         0.0076        +INF            EPS        
AL_TOTCO2            .USA.2100.ANNUAL   -400000.0000         0.0112        +INF            EPS

[Antti-L]

The variable bounds for VAR_COMNET can be set by using the TIMES parameter COM_BNDNET. If you introduced a user constraint saying that VAR_COMNET must be greater than some negative value, that does not help: Defining an additional equation will not affect the lower bound for the variable.

[Tom]

Yes,

It works fine.

Thanks and Ciao Tom