This manuscript has been noticeably improved with the help of very thorough reviews. I take the opportunity to thank the work of each reviewer and there help in improving the language of this paper.
At times, the authors were tempted to evade the remarks of reviewer 1 by deleting the sentence that triggered these remarks. I would have preferred to see a revised statement, but in the interest of this work I will not push it further.

Please include the minor changes below and this paper before it can now go into ACP:

Change:
''"As was already seen in Fig. 4, the mean value is somewhat overestimated at Cinzana and underestimated at Banizoumbou for the three LMDZ simulations."
to
" As already suggested by Fig. 4, the mean value is somewhat overestimated at Cinzana and underestimated at Banizoumbou for the three LMDZ simulations."

Change:
''This underestimation does not question however the main result of the paper which is that an accurate representation of the diurnal evolution of the
boundary layer and transport of momentum by boundary layer convective cells must be taken into account for a good representation of winds, and that such a good representation can be obtained through a combination of turbulent diffusion and mass flux representation of the boundary layer convection.''
to
''This underestimation does not alter the main
result of the paper which is that an accurate representation of the diurnal evolution of the boundary layer and transport of momentum by boundary layer convective cells must be taken into account for a good representation of winds. Such a representation can be obtained through a combination of turbulent diffusion and mass flux parametrization of the boundary layer convection.''

Change
'' Note that the mean diurnal cycle is almost identical when simulations are conducted in free climate mode, without nudging (results not shown).''
to
''Note that the mean diurnal cycle is almost identical when simulations are conducted without nudging, i.e., in free climate mode (not shown).''

I could not understand how lower wind speeds can lead to larger emissions, please clarify the following statement:
"On the other hand, the relationship between daily mean wind speed and emis-
sions (right panel of Fig. 2), suggests that the winds in the NP3 simulation are smaller than in SP3, but emissions are larger for these lower wind speeds.''

After these minor changes the manuscript can go to publication in ACP.

Sincerely,

Yves Balkanski