clarity on ext_frc_type = 'INTERP_MISSING_MONTHS'

[anushree]

Hi all,
I have a confusion regarding

ext_frc_type = 'INTERP_MISSING_MONTHS'
and

srf_emis_type = 'INTERP_MISSING_MONTHS'

So, i want to start the model from the year 2035 (have the restart file for it)
RUN_STARTDATE" value="2035-01-01"
But the ssp585 emissions have the year 2030 and 2040.The in-between years are missing.
if i give the values of ext_frc_type and srf_emis_type as 'INTERP_MISSING_MONTHS' will the model create problem as it is unable to find the year 2035?

Regards,
Anushree

 

[erik]

Moving to the CAM forum

 

[cacraig]

The emission files are and the namelist settings you are asking about are from chemistry group. I will move your question to the CAM-Chem forum

 

[rrbuchholz]

Hi Anushree,

The 'INTERP_MISSING_MONTHS' is the namelist variable definition you want, because the model will use the ssp585 2030 and 2040 emissions to interpolate between years to provide values in 2035.

Best,
Rebecca

 

[anushree]

Thank you for your reply!
Regards,
Anushree

 

[Yuan Sun]

Hi Anushree,

The 'INTERP_MISSING_MONTHS' is the namelist variable definition you want, because the model will use the ssp585 2030 and 2040 emissions to interpolate between years to provide values in 2035.

Best,
Rebecca

Hi Rebecca,

Does the interpolation of 'INTERP_MISSING_MONTHS' change the emission input by month or year?

When examining SSP emission input, I found the time dimension of 2020-01, 2020-02... and then 2030-01, 2030-02...So between 2020 and 2030, would the interpolated values change yearly or monthly?

I am looking forward to hearing from you.

Best,
Yuan

 

[rrbuchholz]

Hi Yuan,

The seasonality in the emissions will also be included when 'INTERP_MISSING_MONTHS' is used. That is, there should still be a seasonal cycle in emissions.
You can check it by saving the surface emissions from the model run:

SF_<species>

kg/m2/s

Emissions of species (Surface Flux)

Best,
Rebecca