First of all, the authors acknowledge the referee 1 and the editor for the time spent to review this manuscript and also for their constructive comments. We regret for the language usage which has arisen the referee concern. The purpose of the present study is to highlight the transport modes which explain the transport of biomass burning plumes over the Southwest Indian Ocean (SWIO) basin during the BiBAC campaign. In order to clarify the objective of the paper, this latter was re-organized in the revised manuscript. In particular, Section 4 which treats on the synoptic and meteorological conditions driving the transport of the biomass burning plume during the BiBAC campaign was significantly re-organized in the revised manuscript. Indeed, this section was rewritten by corrected the inappropriate meteorological diction as suggested by the referee 1. In the revised manuscript, the AERONET data at level 2 was used in order to improve the significance of our results. To better characterize the synoptic conditions occurred during BiBAC, cloud cover products from CAMS reanalysis was added in the dataset used in this study. In order to emphasis on the synoptic conditions and not to extend the overall text length, we removed the paragraph mention about the aerosol size distribution evolution over Maputo. Thereby,the revised manuscript solely focused on meteorological and synoptic conditions driving the transport of biomass burning plume over SWIO basin. The motivations come from the fact that few studies treating on the transport of the biomass burning plume in the SWIO basin (Flamant et al., 2022; Swap et al., 2003; Schmid et al., 2003). These previous works pointed out a main transport mode over the SWIO basin which shaping like a river of smoke. In the present study, the structure of smoke river is also found but under different synoptic conditions than those reported by these previous works. We focused our effort to describe properly (with the appropriate language) these news synoptic conditions leading to river of smoke over the SWIO basin. These news synoptic conditions which occurred during the events detected during the BiBAC campaign are reported in the Figure 1 (This figure was included in the revised version, as Figure 13). In the previous works, the synoptic conditions responsible for the formation of the smoke river involved the propagation of a westerly wave and the development of a cut-off low (Swap et al., 2003; Stein et al., 2003; Flamant et al., 2022). However, we observed during the event 1 a river of smoke structure involved by westerly wave without a cut-off-low. The river of smoke developed in a synoptic context characterized by three successive cold fronts associated with saddle points during the event 2. Language usage has been appropriately corrected for the better readability of the article as suggested by the referee.

The authors acknowledge this referee and the editor for the time spent to review this manuscript and also for their constructive comments.

First of all, the authors acknowledge the referee 2 and the editor for the time spent to review this manuscript and also for their constructive comments.

The purpose of the present study is to highlight the transport modes which explain the transport of biomass burning plumes over the Southwest Indian Ocean (SWIO) basin during the BiBAC campaign. In order to clarify the objective of the paper, this latter was re-organized in the revised manuscript. In particular, Section 4 which treats on the synoptic and meteorological conditions driving the transport of the biomass burning plume during the BiBAC campaign was significantly re-organized in the revised manuscript. In the revised manuscript, the AERONET data at level 2 was used in order to improve the significance of our results. To better characterize the synoptic conditions occurred during BiBAC, cloud cover products from CAMS reanalysis was added in the dataset used in this study. In order to emphasis on the synoptic conditions and not to extend the overall text length, we removed the paragraph treats on the size distribution evolution over Maputo. Therefore, we now solely focus on one scientific question in the revised manuscript : meterological and synoptic conditions driving the transport of biomass burning plume over SWIO basin. The motivations come from the fact that few studies treating on the transport of the biomass burning plume in the SWIO basin (Flamant et al., 2022 ; Swap et al., 2003 ; Schmid et al., 2003). These previous works pointed out a main transport mode over the SWIO basin which shaping like a river of smoke. In the present study, the structure of smoke river is also found but under different synoptic conditions than those reported by these previous works. We focused our effort to describe properly (with the appropriate language) these news synoptic conditions leading to river of smoke over the SWIO basin. In order to allow an easy read and understanding of these results, the quality of the English was checked in the revised manuscript (as suggested by the referee 2).