Dear Kerstin Stebel,

please find attached our answers within your suggestions and questions.

Best regards

Dear anonymous referee,

thank you for reviewing the manuscript. Within your comments we added our responses within your comments.

Best regareds

Some minor points:

• The authors use both “southeast” Asian monsoon and “south” Asian monsoon through the manuscript. Probably, using only “Asian summer monsoon” would be good. => Thank you for pointing it out. We exchanged everything to "Asian summer monsoon"
• Line 103: Remove “calculations of the” => changed
• Lines 132-124: Please specify either parallel or perpendicular for “signal” (two places) => thank you for this note, I added the information that it applies to both orientations of polarisation
• Line 241: p_0 is usually taken as 1000 hPa, rather than 1013 hPa. Probably, the choice here depends on the definition in CLaMS and trajectory calculations. => Thank you for pointing it out. We have checked the difference between a potential temperature calculated with 1000hPa and 1013 hPa. The difference in height is <100m at a exemplary height of 15km
• Figure 5 looks strange, because the values in January and in December should usually be similar, so that we have a seasonal “cycle”. Instead, Figure 5 shows a linearly increasing-trend component. => Thank you for pointing this fact out. When you compare Figure 5 with Figure 10 you have for two selected altitudes also 25th and 75th percentile as well as mean and median. There you can see that December and January are different and the "gap" between December and January is within the error bars. All in all this does not effect our results of this manuscript.
• Line 346 and other places (e.g. line 450): The authors use the terms “aged” and “young”. Please give a rough idea of the time period for both in the context of this work. => In other publications (like Ohneiser et al., 2023) a clear and distinct layer was found in the Arctic stratosphere. In our case we don't have such an easy visable layer rather a faint increased backscatter coefficient, which might have originated from a distinct layer but due to several different processes this layer lost its borders.
• Line 404: Aitken? => thank you, corrected
• Line 472: I am afraid that I cannot see this in Figure 15. There are quite many gray curves. => This figure shall give an overview of a many different pathways from the Arctic to the position, where the air parcel first touches the ground, which is then marked with a coloured circle. We want to emphasize the accumulation of contact points with the boundary layer and the propagation time. The propagation paths are just an additional information about generally the back-trajectories