Modulation of external bottom fluxes
Ulf Graewe
I am using a simple oxygen tracer model, which reads in an external bottom flux (through GETM).
Is there a way to modulate this external flux?
The issue is that I need a spatial varying bottomflux, but I would like to add a time modulation through T/S?
A possible (but not very generic solution) would be to read in the external bottom flux through GETM and pass it to FABM as dependency and do than the T/S stuff in FABM.
Any hints?
Cheers,
ulf
Ulf Gräwe, Dr.
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Jorn Bruggeman
Hi Ulf,
My approach would be to compute the final bottom flux in the “do_bottom” routine of a FABM module, as you suggest. The calculation at that point can depend on near-bottom temperature, salinity, and anything else that might be relevant, including a 2D field that is read-in externally (your original oxygen flux). The calculation itself could either be done inside your oxygen module, or if you’d rather leave that untouched (and more generic), you could add a small stand-alone FABM module that just computes the bottom flux and applies it to an existing state variable, in this case your oxygen tracer.
That seems about as generic as I could imagine… The alternative would be to code the logic inside GETM, I guess, but seems even more specific. When implementing it within FABM, it would at least be usable in other hosts, e.g., GOTM.
Cheers,
Jorn
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