The paper presents an experiment conducted in field and in lab conditions, using two approaches for detecting gaseous emissions in the different stages of biomass combustion, following the temporal evolution of the burn, with particular focus on the pyrolysis stage.
The scientific methodology is well explained, and the results clearly exposed; I think the results presented here are useful for the scientific community; the experimental data are measured by well-established, state of the art techniques.
The reviewers highlighted some critical points: the authors have subsequently provided most of the requested clarifications, and added comments to the main manuscript that, to my knowledge, address the raised issues. Some of the reviewers’ suggestions were not followed: the authors satisfactorily justified wherever they did not follow the recommendations, and in particular, two of the points raised by Rev#3 were strictly connected to each other, and referred to a specific type of analysis for application to the dataset. The authors did not see fit to follow this recommendation, but they provided a sensible explanation for it: the acquired data were somehow unfit for such application. Therefore, I consider it appropriate for the manuscript to proceed forward without the implementation of such further analysis, and recommend the publication of the manuscript in its revised form, provided that they will include some formal changes, discussed below.

I encourage the authors to revise again the English, the formatting of tables and figures throughout the text, following the Journal submission guidelines.
Keywords: cancel “time-resolved”: as such, it does not carry any meaning.
L125 Replace “experimental” with Material and methods
Figure 1 - text is too small and hard to read.
Section 2.1 - specify what models of instruments were used, not just their working principles (L135-140)
L154 - are described in the text below
L167 – specify W-lamp source
L174 – insert comma after “spectra”
L175-76 – English is not clear (“after the fact…”)
L187 – replace “isolated” with “kept”
L188 – and through the manuscript: use SI units, convert Torr in hPa (insert them at least in brackets)
L191-192 – delete “more”, insert comma after “resolution”
L193 – “Performed” instead of “had”
L194 - insert comma after “resolution”
L196 – remove “of the order”
L198 – English not clear
L200 – “the” acquisition time; replace with 30-min interval

L202 – 1 cm-1 (also L218, check through the text)
L210 – give a reference for the OPUS software, describe better briefly what it does differently to MALT.
L215 – insert comma after “bed”
233 – replace seconds with s, cancel “time”
236 – “the” introduction
237 – were produced
243 - insert comma after “libraries”
245 – MALT5? Or is it another version? Please be consistent when naming it or specify the differences should it be a different version.
255 – I think the reference to Figure 1 is inappropriate here, remove.
285 – remove “compound”
Table 2 please arrange all tables in your manuscript according to the same format (double check journal guide)
265 - insert comma after “arrived”
268 - add some “of them”
278 – remove capital after colon (also L360, check through text)
294 - insert comma after “burns”. Replace x in wording, using “times”
L296 - Why do you think the lab gives smaller values results?
L319 - insert comma after “base”
L329 - insert comma after “front”
L330 – insert Detection after IR
338 - insert comma after “method”
344 – MCE? Define the acronym
355 – replace “due to” with “, owing to”
361 - insert comma after “stamp”, define the acronym FLIR
367 – remove “ ‘s”
381 – ranging
392 - insert comma after “visual”
426 – “, if detected,”
434 – remove tilde, replace it with approximately
454-5 remove underline formats
466 – remove . before brackets
473 – missing Reaction from the acronym PTR-MS: correct all through the text
Fig5 in the Legend, Replace in the following manner, or in a better understandable way:
“experimental spectrum” with “spectrum Burn#89” ;
“residual without phenol subtracted” with “spectrum burn#89 no acetic acid”
“residual with phenol subtracted” with “spectrum burn#89 no acetic acid no phenol”
L 491-3 remove [ ]
L500 remove optimisation
Fig 6 enlarge text: make sure you format consistently all figures through the manuscript. All fonts and sizes are currently different between one and the other, they need to be all easily readable.
L521 – replace “are” with is
Fig 7 is smudged, text is too small, the x label could be one for all 3, stacked upon each other.
L551-2 first you call the runs by biomass type, then by number and it could be confusing: keep it consistent, here I would keep using the biomass type. Remove [ ], and use colon instead of full stop.
574 – Matt et al. 2020
591 – insert comma after “techniques”.