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How are sea ice and sea surface temperature data used in CAM?

jentus

H Y
New Member
I have a question regarding how sea ice concentration (SIC) and sea surface temperature (SST) data are used in the CAM model. When using files like sst_HadOIBl_bc_1x1_2000climo_c180511.nc as boundary conditions, does the model continuously read the initial input files throughout the simulation? For example, if I modify only the sea ice data for January to December 1979 and keep the rest of the file unchanged, will the model continue to read the modified sea ice file during the simulation, or does it only read the file once at initialization?

I understand that the model progresses with the atmospheric results, but I'm unsure whether it will continuously read the modified sea ice file or just use it once during initialization and then stop updating.

Supplemental Question: Regarding the F2000climo Simulation

I initially understood that some forcing data needed to be continuously read from the initial files, and that when running the F2000climo experiment for more than one year, the simulation would throw an error because the necessary files wouldn't be available. However, I found that F2000climo can run beyond the first year and produce results for the period after 2000.

My question is whether the results after 2000 are based on the forcing fields from the year 2000 (such as sea ice and greenhouse gas emissions), in which case the results would essentially be a repeat simulation starting from 2000, or if these results can be considered a realistic simulation of the period after 2000?

I really wonder which variables are updated and read at each time step during the CAM simulation, and which ones are only read from the initial input files and remain unchanged? Thank you for your help!
 

jentus

H Y
New Member
I also like to fix the greenhouse gas (GHG) emissions and aerosol forcing to the values from the year 2000 in the CAM model. Any guidance would be appreciated!
 
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