Quantitative Three-Dimensional Basal Ice Roughness from Scanning Electron Microscopy (SEM)
Area of Study
Science and Mathematics
A method for analyzing the three-dimensional surface roughness on the basal facets of polar ice crystals is presented. A functional form of backscattered electron intensity as a function of ice facet orientation is adapted for the use of the basal facet. Using the Gauss-Newton inversion within a Bayesian framework a three dimensional representation of rough surfaces are retrieved at roughly micrometer resolution. Following the development of new statistical measures allow for higher statistical confidence and the connection to a scaling growth mechanism for crystal development. In a collection of results from temperatures ranging from -29 degrees celsius to -35 degrees celsius shows the characteristic of basal roughening to follow crystalline symmetry and a scaling growth mechanism. These results point to a opportunity to use three-dimensional modeling to identify the growth mechanism in polar ice crystals found in cirrus clouds.
Gray, Katie and Patel, Shreeti, "Quantitative Three-Dimensional Basal Ice Roughness from Scanning Electron Microscopy (SEM)" (2018). Summer Research. 321.
University of Puget Sound