Please address additional comments raised by a reviewer.

Since I have not heard back from the second reviewer and I don’t want to significantly delay the paper any further, there are some last comments that should be incorporated in the paper. There is some discussion on roll vortices, but little mention on the impact of canopy induced organized motions (e.g. Finnigan 2009). There is a wealth of micrometeorological studies on the formation of sweep ejection generated vortices above plant canopies including observations of gravity wave induced circulations (e.g. Patton et al., 2011). The presence of organized vortices is typically observable from ground-based micrometeorological observations Eg. Quadrant analysis of w’ and u’, where organized structures as discussed in this paper should be clearly identifiable. At the minimum, some of the micrometeorological studies should be cited in the introduction.

I therefore suggest changing the paragraph starting on line 6: to:

Convection in the BL often organizes into counter-rotating horizontal roll vortices or rolls that extend tothe top of the BL (Figure 1, e.g. Atkinson and Wu Zhang, 1996; Etling and Brown, 1993; Young et al.,2002). In addition sweep ejection type and gravity wave induced vortices can develop over tall canopies (Finnigan et al., 2009, Patton et al., 2011). Buzorius et al. (2001) and Nilsson et al. (2001) noted that roll vortices commonly occurredduring NPF events and suggested that they might be especially conducive to NPF.

Refs:
Finnigan et al., 2009: doi: 10.1017/S0022112009990589
Patton et al., 2011: doi: 10.1175/2010BAMS2614.1