Universität zu Köln

Kalesse, Heike ORCID: 0000-0001-6699-7040, Szyrmer, Wanda, Kneifel, Stefan ORCID: 0000-0003-2220-2968, Kollias, Pavlos ORCID: 0000-0002-5984-7869 and Luke, Edward ORCID: 0000-0002-1606-0046 (2016). Fingerprints of a riming event on cloud radar Doppler spectra: observations and modeling. Atmos. Chem. Phys., 16 (5). S. 2997 - 3013. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1680-7324

Full text not available from this repository.

Abstract

Radar Doppler spectra measurements are exploited to study a riming event when precipitating ice from a seeder cloud sediment through a supercooled liquid water (SLW) layer. The focus is on the 'golden sample' case study for this type of analysis based on observations collected during the deployment of the Atmospheric Radiation Measurement Program's (ARM) mobile facility AMF2 at Hyytiala, Finland, during the Biogenic Aerosols - Effects on Clouds and Climate (BAECC) field campaign. The presented analysis of the height evolution of the radar Doppler spectra is a state-of-the-art retrieval with profiling cloud radars in SLW layers beyond the traditional use of spectral moments. Dynamical effects are considered by following the particle population evolution along slanted tracks that are caused by horizontal advection of the cloud under wind shear conditions. In the SLW layer, the identified liquid peak is used as an air motion tracer to correct the Doppler spectra for vertical air motion and the ice peak is used to study the radar profiles of rimed particles. A 1-D steady-state bin microphysical model is constrained using the SLW and air motion profiles and cloud top radar observations. The observed radar moment profiles of the rimed snow can be simulated reasonably well by the model, but not without making several assumptions about the ice particle concentration and the relative role of deposition and aggregation. This suggests that in situ observations of key ice properties are needed to complement the profiling radar observations before process-oriented studies can effectively evaluate ice microphysical parameterizations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kalesse, Heike UNSPECIFIED orcid.org/0000-0001-6699-7040 UNSPECIFIED Szyrmer, Wanda UNSPECIFIED UNSPECIFIED UNSPECIFIED Kneifel, Stefan UNSPECIFIED orcid.org/0000-0003-2220-2968 UNSPECIFIED Kollias, Pavlos UNSPECIFIED orcid.org/0000-0002-5984-7869 UNSPECIFIED Luke, Edward UNSPECIFIED orcid.org/0000-0002-1606-0046 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-289901
DOI:	10.5194/acp-16-2997-2016
Journal or Publication Title:	Atmos. Chem. Phys.
Volume:	16
Number:	5
Page Range:	S. 2997 - 3013
Date:	2016
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1680-7324
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIXED-PHASE CLOUDS; RAYLEIGH-GANS APPROXIMATION; COLLISION EFFICIENCIES; SAMPLING STRATEGIES; GRAUPEL GROWTH; CIRRUS CLOUDS; SNOWFALL RATE; ICE PLATES; PART I; MICROPHYSICS Multiple languages Environmental Sciences; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28990