The paper „Drivers controlling black carbon temporal variability in the Arctic lower troposphere“ addresses seasonal differences in the eBC concentration during different atmospheric conditions. During this analysis the authors use compare in-situ measurements with model data to find out the history of advected BC. Substantial conclusions are reached and the outline is clear.

Since only in-situ measurements at Gruvebadet (Boundary layer) are taken, the title is a bit misleading, that only one measurement site is taken into account.

Language:

line 94: one comma too much

106: Ångström

118 "The NAO a a measure..."

208: „per [For?] each grid cell…“

250: Ångström

316: pressure

339: Ny-Ålesund

409: Brøggerbreen

412: check units of speed

440-442: «North», «West»

460-461: close bracket

Mathematical formulae,...:

line 96: what does «Tr» mean?

Eq 1: sum over index i is missing

line 161: x_(ij)

Eq 2: What is «R»?

3056, 306,...: What is «R»? What does the value mean?

Tab 1 and 2: p-values printed but not explained in text  -> interpretation needed

line 441-442: what is «r»? and what does it mean?

Figures:

Fig 1b, c, 4, 5a, 6, 7, 9a, S3, S5 - S9: not refereed to in text

Fig: 1a: include Zeppelin Station on map, scale is missing, Maybe you can include a map of entire Svalbard (and maybe even Europe) to clarify the location of the sight?

Fig 5b + Fig 6: move to section 3.3.2, where you talk about it.

Figure 8: How many histograms are plotted? Is it 2 or 3?

The interpretation of many of the figures is too/very short

Text:

Julian date is a clear defined date and counts all dates after 1.1.4713 BC. Please use other name for time of your measurement period to avoid miss-understandings.

line 80f: In which height was the wind measurements performed?

Does Fig. 1C already show the selected wind data?

For some URLs the term «last visited» is missing

l. 219: You write about DOY, but it is not shown in table 1 or fig. 4

Section 3.3 is quite hard to read, because it is not all the time clear, to which figure you refer. When you talk about a new variable, could you please also mention which sub-figure you now analyze?

410: See https://doi.org/10.3390/rs14153771 : There is a downward mixing due to a turbulent wind shear zone in Kongsfjorden