Articles | Volume 22, issue 24
© Author(s) 2022. This work is distributed underthe Creative Commons Attribution 4.0 License.
Seasonal significance of new particle formation impacts on cloud condensation nuclei at a mountaintop location
- Final revised paper (published on 20 Dec 2022)
- Preprint (discussion started on 12 May 2022)
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor |
: Report abuse
RC1: 'Comment on acp-2022-338', Anonymous Referee #1, 30 Jul 2022
- AC1: 'Reply on RC1', Noah Hirshorn, 07 Sep 2022
RC2: 'Comment on acp-2022-338', Anonymous Referee #2, 08 Aug 2022
- AC2: 'Reply on RC2', Noah Hirshorn, 07 Sep 2022
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
AR by Noah Hirshorn on behalf of the Authors (07 Sep 2022)  Author's response Author's tracked changes Manuscript
ED: Referee Nomination & Report Request started (07 Sep 2022) by Lynn M. Russell
RR by Anonymous Referee #2 (27 Sep 2022)
RR by Anonymous Referee #1 (28 Sep 2022)
ED: Publish subject to minor revisions (review by editor) (01 Oct 2022) by Lynn M. Russell
AR by Anna Gannet Hallar on behalf of the Authors (19 Oct 2022)  Author's response Author's tracked changes Manuscript
ED: Publish as is (22 Oct 2022) by Lynn M. Russell
This work reports 15 years of direct measurements of aerosol number size distribution and CCN concentrations at a remote mountaintop observatory. The combination of simultaneous measurements allows to investigate long-term impact of new particle formation events on CCN budget. It is a complex and extended dataset and the results will fit with the scope of ACP, being of interest for the international research community. However, I recommend to improve and correct some issues before it is published in ACP.
L24-70 – There is a lack of references that have previously investigated the impact of NPF on CCN concentrations, some of them on mountain sites and combining PNSD and CCN and/or using monodisperse (e.g., Kalkavouras et al., 2019; Dameto de España et al., 2017; Kalkavouras et al., 2019; Kalivitis et al. 2015; Kecorius et al. 2019; Rejano et al., 2021; Rose et al. 2017) and some NPF studies in mountain sites.
L91-99 – CPC model? Do you routinely calibrate the instrumentation? Please, include both information.
L104, L107, 108 – These references are mainly based on the methodology presented by Dal Maso et al. (2005).
Figure 1 – “Is the average concentration below 25 nm above the 10th percentile of all data?” What means? All data serie, 10th percentile of total particle concentration of that 5min data, daily concentrations?
L127-136 – The Gaussians are calculated following the equation 1, however, I can not see the diameter parameter. Are you using lognormal distribution? The time index, where is that index? “k” is the maximum aerosol number concentration” for each of the modes I guess?. Please check some references as Huusein et al. 2008 (equations) or Hussein et al. 2005 (DO-FIT algorithm) and rewrite this explanation, difficult to understand which fit method are you applying. In addition, 5 different maximum points? 5 different Gaussians? why that number?
Figure 2 – specify what the black lines indicate (and red ones).
Figure 3 – the authors identify the bottom figure as a weak event, why? There is no new mode appearing below 25 nmor growing.
Figure 4 – please use log-scale (or log-log)
Dameto de España et al. 2017: Long-term quantitative field study of New Particle Formation (NPF) events as a source of Cloud Condensation Nuclei (CCN) in the urban background of Vienna, Atmos. Environ., 164, 289-298.
Hallar et al. 2011: Persistent daily new particle formation at a mountain-top location, Atmospheric Environment, 45, 4111-4115.
Hussein et al. 2005: Evaluation of an automatic algorithm for fitting the particle number size distributions. Boreal Environ. Res. 10, 337–355.
Hussein et al. 2008: Observation of regional new particle formation in the urban atmosphere, Tellus B, 60, p509-521.
Kalkavouras et al. 2019: Regional new particle formation as modulators of cloud condensation nuclei and cloud droplet number in the eastern Mediterranean, Atmos. Chem. Phys., 19, 6185–6203.
Kalivitis et al. 2015: Atmospheric new particle formation as a source of CCN in the eastern Mediterranean marine boundary layer, Atmos. Chem. Phys., 15, 9203–9215.
Kecorius et al. 2019: New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: a case study in the Fram Strait and Barents Sea, Atmos. Chem. Phys., 19, 14339–14364.
Kulmala et al. 2012: Measurement of the nucleation of atmospheric aerosol particles, Nat Protoc, 7, 1651–1667.
Rejano et al. 2021: Activation properties of aerosol particles as cloud condensation nuclei at urban and high-altitude remote sites in southern Europe, Sci. Tot. Env., 762, 143100.
Rose et al. 2017: CCN production by new particle formation in the free troposphere, Atmos. Chem. Phys., 17, 1529– 1541.
Su et al. 2022: New particle formation event detection with Mask R-CNN, Atmos. Chem. Phys., 22, 1293-1309.