Universität zu Köln

Nomokonova, Tatiana, Ebell, Kerstin ORCID: 0000-0002-0042-4968, Loehnert, Ulrich, Maturilli, Marion ORCID: 0000-0001-6818-7383, Ritter, Christoph and O'Connor, Ewan (2019). Statistics on clouds and their relation to thermodynamic conditions at Ny-Alesund using ground-based sensor synergy. Atmos. Chem. Phys., 19 (6). S. 4105 - 4127. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1680-7324

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Abstract

The French-German Arctic research base AWIPEV (the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research - AWI - and the French Polar Institute Paul Emile Victor - PEV) at Ny-Alesund, Svalbard, is a unique station for monitoring cloud-related processes in the Arctic. For the first time, data from a set of ground-based instruments at the AWIPEV observatory are analyzed to characterize the vertical structure of clouds. For this study, a 14-month dataset from Cloudnet combining observations from a ceilometer, a 94 GHz cloud radar, and a microwave radiometer is used. A total cloud occurrence of similar to 81 %, with 44.8% multilayer and 36% single-layer clouds, was found. Among single-layer clouds the occurrence of liquid, ice, and mixed-phase clouds was 6.4 %, 9 %, and 20.6 %, respectively. It was found that more than 90% of single-layer liquid and mixed-phase clouds have liquid water path (LWP) values lower than 100 and 200 g m(-2), respectively. Mean values of ice water path (IWP) for ice and mixed-phase clouds were found to be 273 and 164 g m(-2), respectively. The different types of single-layer clouds are also related to in-cloud temperature and the relative humidity under which they occur. Statistics based on observations are compared to ICOsa-hedral Non-hydrostatic (ICON) model output. Distinct differences in liquid-phase occurrence in observations and the model at different environmental temperatures lead to higher occurrence of pure ice clouds. A lower occurrence of mixed-phase clouds in the model at temperatures between -20 and -5 degrees C becomes evident. The analyzed dataset is useful for satellite validation and model evaluation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nomokonova, Tatiana UNSPECIFIED UNSPECIFIED UNSPECIFIED Ebell, Kerstin UNSPECIFIED orcid.org/0000-0002-0042-4968 UNSPECIFIED Loehnert, Ulrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Maturilli, Marion UNSPECIFIED orcid.org/0000-0001-6818-7383 UNSPECIFIED Ritter, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED O'Connor, Ewan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-151165
DOI:	10.5194/acp-19-4105-2019
Journal or Publication Title:	Atmos. Chem. Phys.
Volume:	19
Number:	6
Page Range:	S. 4105 - 4127
Date:	2019
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1680-7324
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIXED-PHASE CLOUDS; ARCTIC CLOUD; ICE CRYSTALS; VERTICAL-DISTRIBUTION; MICROWAVE RADIOMETER; RADIATIVE PROPERTIES; DOPPLER RADAR; A-TRAIN; SURFACE; LIQUID Multiple languages Environmental Sciences; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15116