Physical Sciences and Mathematics Commons^™

Quantitative Three-Dimensional Basal Ice Roughness From Scanning Electron Microscopy (Sem), Katie Gray, Shreeti Patel

Summer Research

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 …