Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Discussion papers
https://doi.org/10.5194/acp-2018-774
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-774
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 17 Sep 2018

Research article | 17 Sep 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Classification of Arctic multilayer clouds using radiosonde and radar data

Maiken Vassel1, Luisa Ickes2, Marion Maturilli3, and Corinna Hoose1 Maiken Vassel et al.
  • 1Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
  • 2Department of Meteorology, Stockholm University, Stockholm, Sweden
  • 3Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

Abstract. Multilayer clouds (MLC) occur more often in the Arctic than globally. In this study a ground-based detection algorithm is developed using radiosoundings and radar from an one-year time period in Ny-Ålesund, Svalbard. The detection algorithm results in a multilayer cloud occurrence of 29% of the investigated days. These multilayer cloud cases are further analysed regarding the possibility of ice crystal seeding. Ice crystal seeding means that an ice crystal can survive sublimation in a subsaturated layer between two cloud layers when falling through this layer. For this we analyse height profiles of relative humidity with respect to ice to identify super- and subsaturated air layers. Then the sublimation of an ice crystal of an assumed initial size of r=100μm on its way through the subsaturated layer is calculated. If the ice crystal still exists when reaching a lower supersaturated layer, ice crystal seeding can potentially take place. Seeding cases are found often, in 23% of the investigated days. The identification of seeding cases is limited by the radar signal inside the subsaturated layer. Clearly separated multilayer clouds, defined by a clear interstice in the radar image, do not interact through seeding (9% of the investigated days). Since there are various deviations between the relative humidity profiles and the radar images, for the non-seeding cases an evaluation by manual visual inspection is additionally done.

Maiken Vassel et al.
Interactive discussion
Status: open (until 29 Nov 2018)
Status: open (until 29 Nov 2018)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Maiken Vassel et al.
Maiken Vassel et al.
Viewed  
Total article views: 400 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
301 91 8 400 8 8
  • HTML: 301
  • PDF: 91
  • XML: 8
  • Total: 400
  • BibTeX: 8
  • EndNote: 8
Views and downloads (calculated since 17 Sep 2018)
Cumulative views and downloads (calculated since 17 Sep 2018)
Viewed (geographical distribution)  
Total article views: 400 (including HTML, PDF, and XML) Thereof 398 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 20 Nov 2018
Publications Copernicus
Download
Short summary
Multilayer clouds are co-existing clouds in different heights. We evaluate measurements and find that Arctic multilayer clouds occur at 29 % of the investigated days at Ny-Ålesund, Svalbard. Multilayer clouds can interact by ice crystals falling from the upper cloud into the lower cloud. This is possible in 23 % of the investigated days and in 9 % it is not possible. Weather models are still erroneous in the Arctic and we suggest that multilayer clouds should be included more in future work.
Multilayer clouds are co-existing clouds in different heights. We evaluate measurements and find...
Citation
Share