Hello everyone.
I have a general question about the possibility of running the fully coupled CESM (or at least CAM-CLM):
From my understanding of running CLM, the land is forced by the atmosphere. Is there a version of the CESM simulation that the atmosphere is driven by fluxes coming from land? Do you know of any type of CAM-CLM coupled simulations in which the atmosphere is forced by the fluxes that come from the land?
I checked the inputdata directory of a fully coupled simulation, and I see the same lnd initial data (ndep, maps, surfdat, ...) that I saw in land-only simulations. When you do a land-only simulation, the Carbon or Methane state of land changes (e.g., thawing of permafrost results in CH4, VegC, CO2, etc, to change). These fluxes that are coming from land, like Methane and Carbon, etc., will be going into the ecosystem (atmosphere as well), so how can we use these outputs (fluxes) as an initial file or forcing for the atmosphere?
The only option that comes to my mind is to use a restart file from the condition of a land-only simulation as an initial file (finidat) for the land namelist, and do a CAM-CLM coupled simulation to see the interaction of the atmosphere with land as a result of using that initial condition (restart file from land). This way, we are just studying the feedback of CAM-CLM.
But, if you want to study the impacts of already thawed permafrost in a certain year on the atmosphere, then I dont see much option in a coupled simulation.
The reason I am asking this is our duration of study is long (~1500 years of land simulation), and at the end we will have the final condition of permafrost, and I thought maybe there is a way to study that final condition of land (fluxes that were produced from land at the end) on the atmosphere.
I have a general question about the possibility of running the fully coupled CESM (or at least CAM-CLM):
From my understanding of running CLM, the land is forced by the atmosphere. Is there a version of the CESM simulation that the atmosphere is driven by fluxes coming from land? Do you know of any type of CAM-CLM coupled simulations in which the atmosphere is forced by the fluxes that come from the land?
I checked the inputdata directory of a fully coupled simulation, and I see the same lnd initial data (ndep, maps, surfdat, ...) that I saw in land-only simulations. When you do a land-only simulation, the Carbon or Methane state of land changes (e.g., thawing of permafrost results in CH4, VegC, CO2, etc, to change). These fluxes that are coming from land, like Methane and Carbon, etc., will be going into the ecosystem (atmosphere as well), so how can we use these outputs (fluxes) as an initial file or forcing for the atmosphere?
The only option that comes to my mind is to use a restart file from the condition of a land-only simulation as an initial file (finidat) for the land namelist, and do a CAM-CLM coupled simulation to see the interaction of the atmosphere with land as a result of using that initial condition (restart file from land). This way, we are just studying the feedback of CAM-CLM.
But, if you want to study the impacts of already thawed permafrost in a certain year on the atmosphere, then I dont see much option in a coupled simulation.
The reason I am asking this is our duration of study is long (~1500 years of land simulation), and at the end we will have the final condition of permafrost, and I thought maybe there is a way to study that final condition of land (fluxes that were produced from land at the end) on the atmosphere.