Ice particle production in mid-level stratiform mixed-phase  clouds observed with collocated A-Train measurements

Zhang, Damao; Wang, Zhien; Kollias, Pavlos; Vogelmann, Andrew M.; Yang, Kang; Luo, Tao

doi:https://doi.org/10.5194/acp-18-4317-2018

Articles | Volume 18, issue 6

https://doi.org/10.5194/acp-18-4317-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-4317-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 6

Research article

|

28 Mar 2018

Research article |

| 28 Mar 2018

Ice particle production in mid-level stratiform mixed-phase clouds observed with collocated A-Train measurements

Damao Zhang, Zhien Wang, Pavlos Kollias, Andrew M. Vogelmann, Kang Yang, and Tao Luo

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Final revised paper (published on 28 Mar 2018)
Preprint (discussion started on 18 Oct 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Great dataset but conclusions way too constrained', Patric Seifert, 17 Nov 2017
RC2: 'review', Anonymous Referee #2, 30 Nov 2017
AC1: 'Author Response to reviewers comments', damao zhang, 25 Jan 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Damao Zhang on behalf of the Authors (26 Jan 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (29 Jan 2018) by Matthias Tesche

RR by Patric Seifert (13 Feb 2018)

Suggestions for revision or reasons for rejection

In the revised version of the manuscript, Zhang et al. appropriately considered the comments of the reviewers. I was happy to see that the authors added a discussion of possible pressure effects on ice crystal growth.

From my point of view, the manuscript is now suited for publication in ACP. Below, there are just a few suggestions for technical corrections (I refer to the line numbering in the annotated manuscript that was attached to the reply to the reviewers):

- P3, L3: Also Hoose and Möhler (2012, Figs. 1 and 2) provide a neat overview of heterogeneous freezing modes and the freezing activity of various aerosol types.
- P6, L12: '...mixed-phase clouds is similar....'
- P7, L1: '...10 dBZ variation....'
- P8, L16-L17: '...CTT, clouds with a larger LWP have a geometrically...'
- P8, L18: '...and to grow larger....' ; '....clouds with larger LWP also have larger ice growth rates...'

- Discussion:
Dust is likely a main contributor to the observed seasonal variability of ice formation. Recently, however, also a discussion was started about the potential role of biogenic INP ( Hoose and Möhler, 2012; Hader et al., 2014; Augustin-Bauditz et al., 2016; Dreischmeier et al., 2017). The authors could consider this aspect in their discussion by adding a single sentence that also biological activity is much higher in the northern hemisphere because of the larger land mass, which would in addition also agree to the observed seasonality in ice formation efficiency reported by the authors.

Refs:
Augustin-Bauditz, S., Wex, H., Denjean, C., Hartmann, S., Schneider, J., Schmidt, S., Ebert, M., and Stratmann, F.: Laboratory-generated mixtures of mineral dust particles with biological substances: characterization of the particle mixing state and immersion freezing behavior, Atmos. Chem. Phys., 16, 5531-5543, https://doi.org/10.5194/acp-16-5531-2016, 2016.

Dreischmeier K, Budke C, Wiehemeier L, Kottke T, Koop T. Boreal pollen contain ice-nucleating as well as ice-binding ‘antifreeze’ polysaccharides. Scientific Reports. 2017;7: 41890.

Hader, J. D., Wright, T. P. & Petters, M. D. Contribution of pollen to atmospheric ice nuclei concentrations. Atmos. Chem. Phys. 14, 5433–5449 (2014).

Hoose, C. and Möhler, O.: Heterogeneous ice nucleation on atmospheric aerosols: a review of results from laboratory experiments, Atmos. Chem. Phys., 12, 9817-9854, https://doi.org/10.5194/acp-12-9817-2012, 2012.

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RR by Anonymous Referee #2 (16 Feb 2018)

ED: Publish subject to technical corrections (16 Feb 2018) by Matthias Tesche

AR by Damao Zhang on behalf of the Authors (23 Feb 2018) Author's response Manuscript

Short summary

Ice production in atmospheric clouds is important for global water cycle and radiation budget. Active satellite remote sensing measurements are analyzed to quantitatively study primary ice particle production in stratiform mixed-phase clouds on a global scale. We quantify the geographic and seasonal variations of ice production and their correlations with aerosol, especially mineral dust activities. The results can be used to evaluate mixed-phased clouds simulations by global climate models.