Dear authors,

I am pleased to inform you that your paper is accepted for publication in ACP after the technical corrections given below have been considered:

Best regards, Farahnaz Khosrawi

Technical corrections:
P2, L43: The PSCs consist of three types, they are not formed by three types. Thus, rephrase the sentence as follows: .......both winter hemispheres, and consist of three types of particles which can also coexist,

P2, L50-52: There is a repetition in these two sentences and I would suggest to move the part with the meteoric dust particles at the end of the paragraph.

P2, L60: Since you have denitrification in quotation marks I would suggest to do the same with dehydration.

P6, L176: The references Spang et al. (2012) and Sembhi et al. (2012) should appear at the end of the sentence.

P7, L197: It should read " Mixed-type clouds have not been considered......."

P7, L210: r > 3 m should read r > 3 mu m.

P9, L263: It should rather read: " these can easily be". One "be" is obsolete here.

P10, L289: better to write "between January and December 2005". Writing after both months the year is a bit confusing since it's the same year.

P11, 311: Same as on P7, L210, r > 3 m should read r > 3 mu m.

P13, L364: it should read ........may be classified"

P13, L377: The sentence starting with "coincident H2O and HNO3" is not clear. Please rephrase.

P14, Fig3 and respective text parts: I would say this is not a PDF, it's the frequency distribution. If you would show here a PDF the y-axis should show the probability and not the count.

P16, L434: better to write "begin of June" than "start of June".

P21, L532: it should rather read " by only a slight......".

P21, L536: Better to start the sentence with "Additionally, to the 2002 winter.....".

P22, Figure 8 caption: "coded" instead of "code"?

P22, L549: It should read "2003/2004" instead of "2003/4".

P25, l604: Better to start the sentence as follows: " The Arctic winter......"

P26, L631: What do you mean with "also with minor up"?

P27, Figure 11 caption: "are highlighting".

P28, L673: like ----> as

P28, L674: add "be" so that it reads "may be classified".

P28, 678: Rephrase as follows: "Ice PSCs observations are rare, but have been..........".

P29, L589: space at the end of the sentence obsolete.

P36, L845-846: Something is wrong here with the formatting.

P36, L853: The sentence is difficult to read, please rephrase.

P36, L875: I would say "drawn" is in this context not the right expression. It should rather read "obtained" or "derived".