A quasi-liquid mediated continuum model of faceted ice dynamics

Steven Neshyba, Jonathan Adams, Kelsey Reed, Penny M. Rowe, Ivan Gladich

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a quasi-liquid mediated continuum model for ice growth consisting of partial differential equations informed by molecular dynamics simulations. The main insight from molecular dynamics is the appearance of periodic variations in the equilibrium vapor pressure and quasi-liquid thickness of the ice/vapor interface. These variations are incorporated in the continuum model as subgrid scale microsurfaces. We show that persistent faceted ice growth in the presence of inhomogeneities in the ambient vapor field is due to a spontaneous narrowing of terraces at facet corners, which compensates for higher ambient water vapor density via feedback between surface supersaturation and quasi-liquid thickness. We argue that this emergent behavior has the mathematical structure of a stable limit cycle and characterize its robustness in terms of ranges of parameters that support it. Because the model is relevant in the high-surface-coverage regime, it serves as a useful complement to the Burton-Cabrera-Frank framework. Quantitative aspects and limitations of the model are also discussed.

Original languageEnglish
Pages (from-to)14,035-14,055
JournalJournal of Geophysical Research: Atmospheres
Volume121
Issue number23
DOIs
Publication statusPublished - 16 Dec 2016

    Fingerprint

Keywords

  • continuum
  • facet
  • ice
  • limit cycle
  • modeling
  • molecular dynamics

ASJC Scopus subject areas

  • Geophysics
  • Oceanography
  • Forestry
  • Ecology
  • Aquatic Science
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this