Universität zu Köln

Neto, Jose Dias, Kneifel, Stefan ORCID: 0000-0003-2220-2968, Ori, Davide ORCID: 0000-0002-9964-2200, Troemel, Silke, Handwerker, Jan, Bohn, Birger, Hermes, Normen, Muehlbauer, Kai, Lenefer, Martin and Simmer, Clemens ORCID: 0000-0003-3001-8642 (2019). The TRIple-frequency and Polarimetric radar Experiment for improving process observations of winter precipitation. Earth Syst. Sci. Data, 11 (2). S. 845 - 864. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1866-3516

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Abstract

This paper describes a 2-month dataset of ground-based triple-frequency (X, Ka, and W band) Doppler radar observations during the winter season obtained at the Julich ObservatorY for Cloud Evolution Core Facility (JOYCE-CF), Germany. All relevant post-processing steps, such as re-gridding and offset and attenuation correction, as well as quality flagging, are described. The dataset contains all necessary information required to recover data at intermediate processing steps for user-specific applications and corrections (https://doi.org/10.5281/zenodo.1341389; Dias Neto et al., 2019). The large number of ice clouds included in the dataset allows for a first statistical analysis of their multifrequency radar signatures. The reflectivity differences quantified by dual-wavelength ratios (DWRs) reveal temperature regimes where aggregation seems to be triggered. Overall, the aggregation signatures found in the triple-frequency space agree with and corroborate conclusions from previous studies. The combination of DWRs with mean Doppler velocity and linear depolarization ratio enables us to distinguish signatures of rimed particles and melting snowflakes. The riming signatures in the DWRs agree well with results found in previous triple-frequency studies. Close to the melting layer, however, we find very large DWRs (up to 20 dB), which have not been reported before. A combined analysis of these extreme DWR with mean Doppler velocity and a linear depolarization ratio allows this signature to be separated, which is most likely related to strong aggregation, from the triple-frequency characteristics of melting particles.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Neto, Jose Dias UNSPECIFIED UNSPECIFIED UNSPECIFIED Kneifel, Stefan UNSPECIFIED orcid.org/0000-0003-2220-2968 UNSPECIFIED Ori, Davide UNSPECIFIED orcid.org/0000-0002-9964-2200 UNSPECIFIED Troemel, Silke UNSPECIFIED UNSPECIFIED UNSPECIFIED Handwerker, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohn, Birger UNSPECIFIED UNSPECIFIED UNSPECIFIED Hermes, Normen UNSPECIFIED UNSPECIFIED UNSPECIFIED Muehlbauer, Kai UNSPECIFIED UNSPECIFIED UNSPECIFIED Lenefer, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Simmer, Clemens UNSPECIFIED orcid.org/0000-0003-3001-8642 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-137799
DOI:	10.5194/essd-11-845-2019
Journal or Publication Title:	Earth Syst. Sci. Data
Volume:	11
Number:	2
Page Range:	S. 845 - 864
Date:	2019
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1866-3516
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 LIQUID WATER-CONTENT; DOPPLER SPECTRA; SIGNATURES; BAND; REFLECTIVITY; RETRIEVAL; SYSTEM; ICE; DISTRIBUTIONS; VALIDATION Multiple languages Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13779