mmills@ucar_edu
Member
Gravity waves break in the middle and upper atmosphere where molecular diffusion
coefficients become large. However, the gravity wave breaking scheme has been passed an eddy diffusivity for heat (kvh) instead of molecular diffusivity. Hence gravity wave breaking in the upper atmosphere is not treated correctly. In tests where this bug is fixed, very little change is seen in calculated climate or dynamics of the middle atmosphere.
This bug is present in all versions of CESM through the current (1.0.3), and should be fixed with the next public release of CESM. This issue has been posted to the CESM Release Notes webpage.
coefficients become large. However, the gravity wave breaking scheme has been passed an eddy diffusivity for heat (kvh) instead of molecular diffusivity. Hence gravity wave breaking in the upper atmosphere is not treated correctly. In tests where this bug is fixed, very little change is seen in calculated climate or dynamics of the middle atmosphere.
This bug is present in all versions of CESM through the current (1.0.3), and should be fixed with the next public release of CESM. This issue has been posted to the CESM Release Notes webpage.