1. Dan Harnos, Jessica Colberg, Joseph Ching, Michelle Pitcel
bl_pbl_physics
Dan Harnos, Jessica Colberg, Joseph Ching, Michelle Pitcel

2. Scheme options Option 1: YSU (Control) Option 0: No PBL scheme
Prognostic: none
Diagnostic: exec_h
Cloud mixing: QC, QI
Option 0: No PBL scheme
Option 5: MYNN2
Prognostic: QKE
Diagnostic: Tsq, Qsq, Cov, exch_h, exch_m
Cloud mixing: QC
Tsq: Variance of theta1
Qsq: Variance of qw
QKE: 2x the turbulent kinetic energy
Exch_h: turbulent coefficient for heat
Exch_m: turbulent coefficient for momentum

3. More realistic as heating should induce mixing of the boundary layer
*Winds are stronger (more mixing occurs) with boundary layer physics included.
*More realistic as heating should induce mixing of the boundary layer
*With no physics, minimal mixing occurs
Winds are stronger (more mixing occurs) with boundary layer physics included.
More realistic as heating should induce mixing of the boundary layer
With no physics, minimal mixing occurs

4. Temperature appears to be independent of the scheme
Minimal differences appear with the varying model setups
*Temperature appears to be independent of the scheme
*Minimal differences appear with the varying model setups

5. Scheme 5 has the most definite layers of humidity between the 3 setups
Much more variation, although it seems this should indicate less mixing
This may be better handled by scheme 1
*Scheme 5 has the most definite layers of humidity between the 3 setups
*Much more variation, although it seems this should indicate less mixing
*This may be better handled by scheme 1

6. Vertical motion seems to vary minimally between all the schemes
Minimal differences appear with the varying model setups
*Vertical motion seems to vary minimally between all the schemes
*Minimal differences appear with the varying model setups

7. PBL Scheme flux comparisons
Different
Net ground heat flux
Downward LW flux at surface
Upward LW flux at TOA
Upward sensible heat flux at surface
Upward latent heat flux at surface
Upward LW flux at Surface
Identical
Downward SW flux at surface
Upward SW flux at TOA
Downward SW flux at TOA
Upward SW flux at surface
Downward LW flux at TOA (zero)

14. Conclusions
Both PBL schemes show realistic boundary layer development with minimal differences.
No PBL scheme captures surface reasonably well, although BL features lack depth.
Diurnal cycle and temporal spacing captured well across all.
Selection of PBL scheme dependent upon your simulation
If ice in BL use option 1, etc.

15. Supplemental Content