Hello,
I have a question about the direction of the bottom fluxes specified in ana_btflux.h. When the variable 'btflx' is assigned a positive value for temperature at a given location on the bottom, does that make that location a heat source or sink? I did some idealized simulations to test this. I found that a positive btflx drew down the temperature at the bottom. This seems to suggest positive btflx corresponds to heat loss through the bottom. To me, this is a bit counter-intuitive as I was expecting the opposite. Could anyone help clarify this?
Thanks!