Dear Claudia,

thank you for addressing all reviewer comments and providing a carefully revised manuscript. I'm happy to accept it for publication in ACP.
I have several suggestions for minor (technical) corrections below. Please take them into account prior to uploading the final files or during proofreading.

Best regards
Barbara

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p. 5, l.3/ 4: can be shortened to ‘…depends on T and P’ as they have been defined before
p. 5, l. 16: (P0 = 0.1 MPa) can be removed
p. 6, l. 12: should this read ‘…are given in Appendix A1 as Eq. A1 and Eqs A2 – A6, respectively.’ (not ‘…are given in Appendix A1 as Eq. A1 and Eqs A1 – A5, respectively.’)
p. 7, l. 18-21 (‘Assuming…’): This is a very long sentence. Please split into two.
p. 7, l. 39: ‘The green line assumes….’. Please reword, e.g. ‘It is assumed that the ice embryo has a spherical shape of r = 1.1 nm when it reaches the QLL and then starts to grow in length as a cylinder with half spheres at its ends (green line in Fig. 6).’
p. 7, l. 41: replace ‘requesting’ by ‘requiring’
p. 8, l. 5: replace ‘requested’ by ‘required’
p. 8, l. 19: either ‘melts’ or ‘may melt’
p. 10, l. 21: replace ‘realizes’ by ‘reaches’ (check meaning)
p. 10, l. 31: add degree symbol (0°)
p. 12, l. 12: write units consistently, i.e. kg m-3
p. 15, l. 37: you can write either ‘depends inversely on…’ or ‘is inversely proportional…’
p. 17, l. 1: ‘exponential parameter’ does not seem a common term. Why not simply ‘exponent’?
p. 25, l. 3: QLL has not been defined before