Active sites for ice nucleation differ depending on nucleation mode

MA Holden, JM Campbell… - Proceedings of the …, 2021 - National Acad Sciences
The nucleation of ice crystals in clouds is poorly understood, despite being of critical
importance for our planet's climate. Nucleation occurs largely at rare “active sites” present on …

Observing the formation of ice and organic crystals in active sites

JM Campbell, FC Meldrum… - Proceedings of the …, 2017 - National Acad Sciences
Heterogeneous nucleation is vital to a wide range of areas as diverse as ice nucleation on
atmospheric aerosols and the fabrication of high-performance thin films. There is excellent …

Pore condensation and freezing is responsible for ice formation below water saturation for porous particles

RO David, C Marcolli, J Fahrni, Y Qiu… - Proceedings of the …, 2019 - National Acad Sciences
Ice nucleation in the atmosphere influences cloud properties, altering precipitation and the
radiative balance, ultimately regulating Earth's climate. An accepted ice nucleation pathway …

Sensitivities of immersion freezing: Reconciling classical nucleation theory and deterministic expressions

B Ervens, G Feingold - Geophysical Research Letters, 2013 - Wiley Online Library
Ice particle number concentrations are often described deterministically, ie, ice nucleation is
singular and occurs on active sites unambiguously at a given temperature. Other …

The role of time in heterogeneous freezing nucleation

TP Wright, MD Petters - Journal of Geophysical Research …, 2013 - Wiley Online Library
A small fraction of particles in the atmosphere can catalyze ice formation in cloud water
drops through heterogeneous freezing nucleation at temperatures warmer than the …

The enhancement and suppression of immersion mode heterogeneous ice-nucleation by solutes

TF Whale, MA Holden, TW Wilson, D O'Sullivan… - Chemical …, 2018 - pubs.rsc.org
Heterogeneous nucleation of ice from aqueous solutions is an important yet poorly
understood process in multiple fields, not least the atmospheric sciences where it impacts …

Deposition nucleation viewed as homogeneous or immersion freezing in pores and cavities

C Marcolli - Atmospheric Chemistry and Physics, 2014 - acp.copernicus.org
Heterogeneous ice nucleation is an important mechanism for the glaciation of mixed phase
clouds and may also be relevant for cloud formation and dehydration at the cirrus cloud …

Ice nucleation on mineral dust particles: Onset conditions, nucleation rates and contact angles

ML Eastwood, S Cremel, C Gehrke… - Journal of …, 2008 - Wiley Online Library
An optical microscope coupled to a flow cell was used to investigate the onset conditions for
ice nucleation on five atmospherically relevant minerals at temperatures ranging from 233 to …

Evaporation freezing by contact nucleation inside‐out

AJ Durant, RA Shaw - Geophysical Research Letters, 2005 - Wiley Online Library
Ice formation in atmospheric clouds is crucial to our understanding of precipitation and cloud
radiative properties. In recent work it was shown that heterogeneous ice nucleation rates …

Active sites in heterogeneous ice nucleation—the example of K-rich feldspars

A Kiselev, F Bachmann, P Pedevilla, SJ Cox… - Science, 2017 - science.org
Ice formation on aerosol particles is a process of crucial importance to Earth's climate and
the environmental sciences, but it is not understood at the molecular level. This is partly …