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Title: How nanoscale surface steps promote ice growth on feldspar: microscopy observation of morphology-enhanced condensation and freezing

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/c9nr08729j· OSTI ID:1772941

Ice in the atmosphere affects Earth's radiative properties and initiates most precipitation. Growing ice often requires a solid surface, either to catalyze freezing of supercooled cloud droplets or to serve as a substrate for ice deposited from water vapor. There is evidence that this surface is typically provided by airborne mineral dust; but how chemistry, structure and morphology interrelate to determine the ice-nucleating ability of mineral surfaces remains elusive. Here, we combine optical microscopy with atomic force microscopy to explore the mechanisms of initial ice growth on alkali feldspar, a mineral proposed to dominate ice nucleation in Earth's atmosphere. When cold air becomes supersaturated with respect to water, we discovered that ice rapidly spreads along steps of a feldspar surface. By measuring how ice propagation depends on surface-step height we establish a scenario where supercooled liquid water condenses at steps without having to overcome a nucleation barrier, and subsequently freezes quickly. Finally, our results imply that steps, which are common even on macroscopically flat feldspar surfaces, can accelerate water condensation followed by freezing, thus promoting glaciation and dehydration of mixed-phase clouds.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0003525; LDRD
OSTI ID:
1772941
Alternate ID(s):
OSTI ID: 1572423
Report Number(s):
SAND2021-3168J; 694838
Journal Information:
Nanoscale, Vol. 11, Issue 44; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (48)

Global indirect aerosol effects: a review journal January 2005
Climate impacts of ice nucleation: ICE NUCLEATION journal October 2012
Predicting global atmospheric ice nuclei distributions and their impacts on climate journal June 2010
Observational constraints on mixed-phase clouds imply higher climate sensitivity journal April 2016
Warm rain processes over tropical oceans and climate implications: WARM RAIN PROCESSES OVER TROPICAL OCEANS journal December 2003
Frequency of occurrence of rain from liquid-, mixed-, and ice-phase clouds derived from A-Train satellite retrievals: RAIN FROM LIQUID- AND ICE-PHASE CLOUDS journal August 2015
Technical Note: A proposal for ice nucleation terminology journal January 2015
Overview of Ice Nucleating Particles journal January 2017
Heterogeneous ice nucleation on atmospheric aerosols: a review of results from laboratory experiments journal January 2012
Chemical composition of ambient aerosol, ice residues and cloud droplet residues in mixed-phase clouds: single particle analysis during the Cloud and Aerosol Characterization Experiment (CLACE 6) journal January 2010
In situ detection of biological particles in cloud ice-crystals journal May 2009
Clarifying the Dominant Sources and Mechanisms of Cirrus Cloud Formation journal May 2013
A Classical-Theory-Based Parameterization of Heterogeneous Ice Nucleation by Mineral Dust, Soot, and Biological Particles in a Global Climate Model journal August 2010
The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds journal June 2013
Feldspar minerals as efficient deposition ice nuclei journal January 2013
Ice nucleation efficiency of natural dust samples in the immersion mode journal January 2016
The role of phase separation and related topography in the exceptional ice-nucleating ability of alkali feldspars journal January 2017
Direct observations of the atmospheric processing of Asian mineral dust journal January 2007
Microspectroscopic imaging and characterization of individually identified ice nucleating particles from a case field study: CHARACTERIZATION OF INDIVIDUAL IN journal September 2014
The seeds of ice in clouds journal June 2013
Resurgence in Ice Nuclei Measurement Research journal December 2011
Perspectives on the Future of Ice Nucleation Research: Research Needs and Unanswered Questions Identified from Two International Workshops journal July 2017
Exploring the Mechanisms of Ice Nucleation on Kaolinite: From Deposition Nucleation to Condensation Freezing journal January 2014
The Role of Organic Aerosol in Atmospheric Ice Nucleation: A Review journal January 2018
Deposition nucleation viewed as homogeneous or immersion freezing in pores and cavities journal January 2014
Pore condensation and freezing is responsible for ice formation below water saturation for porous particles journal April 2019
Ice nucleation properties of the most abundant mineral dust phases journal January 2008
Active sites in heterogeneous ice nucleation—the example of K-rich feldspars journal December 2016
Ice nucleation efficiency of clay minerals in the immersion mode journal January 2012
Two-step crystal nucleation via capillary condensation journal January 2013
Activation of Atmospheric Particles as Ice Nuclei in Cold and Dry Air journal November 1966
Limitations of the Wegener–Bergeron–Findeisen Mechanism in the Evolution of Mixed-Phase Clouds journal September 2007
Effect of electrolyte on surface free energy components of feldspar minerals using thin-layer wicking method journal May 2005
Initial stages of water adsorption on NaCl (100) studied by scanning polarization force microscopy journal September 2005
Two-dimensional wetting: The role of atomic steps on the nucleation of thin water films on BaF2(111) at ambient conditions journal June 2010
Resilience of persistent Arctic mixed-phase clouds journal December 2011
Phase transformation of mixed-phase clouds journal January 2003
Review of the vapour pressures of ice and supercooled water for atmospheric applications journal April 2005
Snow crystals journal January 1982
Formation of hexagonal and cubic ice during low-temperature growth journal July 2013
Different contact angle distributions for heterogeneous ice nucleation in the Community Atmospheric Model version 5 journal January 2014
Aircraft icing
  • Gent, R. W.; Dart, N. P.; Cansdale, J. T.
  • Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 358, Issue 1776 https://doi.org/10.1098/rsta.2000.0689
journal November 2000
Design of anti-icing surfaces: smooth, textured or slippery? journal January 2016
Pore condensation and freezing is responsible for ice formation below water saturation for porous particles text January 2019
Ice nucleation efficiency of clay minerals in the immersion mode text January 2012
Perspectives on the Future of Ice Nucleation Research: Research Needs and Unanswered Questions Identified from Two International Workshops text January 2017
Heterogeneous ice nucleation on atmospheric aerosols: a review of results from laboratory experiments text January 2012
Different contact angle distributions for heterogeneous ice nucleation in the community atmospheric model version 5 text January 2014