Ice aggregation in low‐level mixed‐phase clouds at a high Arctic site: Enhanced by dendritic growth and absent close to the melting level

G Chellini, R Gierens, S Kneifel - Journal of Geophysical …, 2022 - Wiley Online Library
Low‐level mixed‐phase clouds (MPCs) occur extensively in the Arctic, and are known to
play a key role for the energy budget. While their characteristic structure is nowadays well …

Evaluation of ice particle growth in ICON using statistics of multi‐frequency Doppler cloud radar observations

D Ori, V Schemann, M Karrer… - Quarterly Journal of …, 2020 - Wiley Online Library
Vertically pointing radar observations combining multiple frequencies and Doppler
measurements have been recently shown to contain valuable information about ice particle …

MASCDB, a database of images, descriptors and microphysical properties of individual snowflakes in free fall

J Grazioli, G Ghiggi, AC Billault-Roux, A Berne - Scientific Data, 2022 - nature.com
Snowfall information at the scale of individual particles is rare, difficult to gather, but
fundamental for a better understanding of solid precipitation microphysics. In this article we …

Improving the representation of aggregation in a two-moment microphysical scheme with statistics of multi-frequency Doppler radar observations

M Karrer, A Seifert, D Ori… - Atmospheric Chemistry and …, 2021 - acp.copernicus.org
Aggregation is a key microphysical process for the formation of precipitable ice particles. Its
theoretical description involves many parameters and dependencies among different …

[HTML][HTML] Low-level mixed-phase clouds at the high Arctic site of Ny-Ålesund: A comprehensive long-term dataset of remote sensing observations

G Chellini, R Gierens, K Ebell, T Kiszler… - Earth System …, 2023 - essd.copernicus.org
We present a comprehensive quality-controlled 15-month dataset of remote sensing
observations of low-level mixed-phase clouds (LLMPCs) taken at the high Arctic site of Ny …

[HTML][HTML] Highly supercooled riming and unusual triple-frequency radar signatures over McMurdo Station, Antarctica

F Tridon, I Silber, A Battaglia, S Kneifel… - Atmospheric …, 2022 - acp.copernicus.org
Riming of ice crystals by supercooled water droplets is an efficient ice growth process, but its
basic properties are still poorly known. While it has been shown to contribute significantly to …

[HTML][HTML] snowScatt 1.0: consistent model of microphysical and scattering properties of rimed and unrimed snowflakes based on the self-similar Rayleigh–Gans …

D Ori, L von Terzi, M Karrer… - Geoscientific Model …, 2021 - gmd.copernicus.org
More detailed observational capabilities in the microwave (MW) range and advancements in
the details of microphysical schemes for ice and snow demand increasing complexity to be …

[HTML][HTML] Reconstruction of the mass and geometry of snowfall particles from multi-angle snowflake camera (MASC) images

J Leinonen, J Grazioli, A Berne - Atmospheric Measurement …, 2021 - amt.copernicus.org
This paper presents a method named 3D-GAN, based on a generative adversarial network
(GAN), to retrieve the total mass, 3D structure and the internal mass distribution of …

Turbulence as a key driver of ice aggregation and riming in Arctic low‐level mixed‐phase clouds, revealed by long‐term cloud radar observations

G Chellini, S Kneifel - Geophysical Research Letters, 2024 - Wiley Online Library
Turbulence in clouds is known to enhance particle collision rates, as widely demonstrated
for warm rain formation. A similar impact on ice growth processes is expected but a solid …

The Ice Particle and Aggregate Simulator (IPAS). Part III: Verification and analysis of ice–aggregate and aggregate–aggregate collection for microphysical …

VM Przybylo, KJ Sulia, ZJ Lebo… - Journal of the …, 2022 - journals.ametsoc.org
Abstract The Ice Particle and Aggregate Simulator (IPAS) is used to theoretically represent
the aggregation process of ice crystals. Aggregates have a variety of formations based on …