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Title: Fingerprints of a riming event on cloud radar Doppler spectra: observations and modeling

Journal Article · · Atmospheric Chemistry and Physics (Online)
 [1];  [1];  [1];  [1];  [2]
  1. McGill Univ., Montreal, QC (Canada)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)

In this paper, 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 Hyytiälä, 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. In conclusion, 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1336080
Report Number(s):
BNL-112468-2016-JA; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
Journal Information:
Atmospheric Chemistry and Physics (Online), Vol. 16, Issue 5; ISSN 1680-7324
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (17)

Insights into riming and aggregation processes as revealed by aircraft, radar, and disdrometer observations for a 27 April 2011 widespread precipitation event: Insights into Riming and Aggregation journal May 2016
Toward Exploring the Synergy Between Cloud Radar Polarimetry and Doppler Spectral Analysis in Deep Cold Precipitating Systems in the Arctic journal March 2018
Retrievals of Riming and Snow Density From Vertically Pointing Doppler Radars journal December 2018
Growth of ice particle mass and projected area during riming journal January 2017
Clutter mitigation, multiple peaks, and high-order spectral moments in 35 GHz vertically pointing radar velocity spectra journal January 2018
Development and validation of a supervised machine learning radar Doppler spectra peak-finding algorithm journal January 2019
peakTree: a framework for structure-preserving radar Doppler spectra analysis journal January 2019
The importance of particle size distribution and internal structure for triple-frequency radar retrievals of the morphology of snow journal January 2019
(GO) 2 -SIM: a GCM-oriented ground-observation forward-simulator framework for objective evaluation of cloud and precipitation phase journal January 2018
Retrieving Fall Streaks within Cloud Systems Using Doppler Radar journal April 2017
Studying ice particle growth processes in mixed-phase clouds using spectral polarimetric radar measurements text January 2018
Observing ice particle growth along fall streaks in mixed-phase clouds using spectral polarimetric radar data journal June 2018
Overview: Fusion of radar polarimetry and numerical atmospheric modelling towards an improved understanding of cloud and precipitation processes journal December 2021
Optimizing observations of drizzle onset with millimeter-wavelength radars journal January 2017
Estimating total attenuation using Rayleigh targets at cloud top: applications in multilayer and mixed-phase clouds observed by ground-based multifrequency radars journal January 2020
Linking rain into ice microphysics across the melting layer in stratiform rain: a closure study journal January 2021
PAMTRA 1.0: the Passive and Active Microwave radiative TRAnsfer tool for simulating radiometer and radar measurements of the cloudy atmosphere journal January 2020

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