Simulation Analysis of Glacial Surging in the Des Moines Ice Lobe

Download PDFDownload Simulation Analysis of Glacial Surging in the Des Moines Ice Lobe PDF

by Jesse A. Sherburn, M.S., Mark F. Horstemeyer, Ph.D., and Kiran Solanski, M.S.

In A. A. Snelling (Ed.) (2008). Proceedings of the Sixth International Conference on Creationism (pp. 263–273). Pittsburgh, PA: Creation Science Fellowship and Dallas, TX: Institute for Creation Research.

Abstract

We analyze the Des Moines Ice Lobe of the Laurentide Ice Sheet (a main portion of the glacier that flowed into the United States) using finite element simulations to explore plausible surging scenarios that can reduce ice motion time scales from thousands of years to a couple of decades. We chose the Des Moines Ice Lobe of the Laurentide Ice Sheet, because of its relatively simple geometry. Previous studies considered idealized geometries of continental scale to investigate parameters related to the surging phenomena (cf., Horstemeyer & Gullett, 2003). These continental scale simulations of the Laurentide Ice Sheet provide boundary conditions for our local scale fi nite element simulations to allow us to examine effects of varying precipitation rates on the larger ice sheet. To further the work of Horstemeyer and Gullett, we performed three dimensional simulations, added a deformable basal till layer, and modified the problem domain from a generic dome to a slab representing the front edge of the Des Moines Ice Lobe. These three dimensional simulation results illustrate clear surging lobing effects that have been observed in nature.

Keywords

Glacier, Surging, Material modeling, Internal state variable, Des Moines Ice Lobe

For Full Text

Please see the Download PDF link above for the entire article.

The Latest
NEWS
Not-So-Simple Plankton
Plankton is a generic term for small marine creatures such as algae, bacteria, and protozoa. Although tiny, they are packed with incredibly intricate...

NEWS
Merry Christmas from the Moon
We are so thankful for you, our faithful ICR supporters who have enabled us to advance the message of biblical creation throughout this year. We hope...

NEWS
Amazing Design of Black Widow Web Silk
Evidence for creation is seen in both the sudden origin1 of spiders, as demonstrated in the fossil record, and their amazing design.2 All spiders are...

NEWS
Reptile Footprints Advance Flood Explanation
Salamander-like footprints preserved in sandstone have long fascinated Grand Canyon hikers and rafters. Insights from a new study of the track patterns...

DAYS OF PRAISE DEVOTIONALS
Winter 2018
...