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
Save the Date for Giving Tuesday 2018!
We’re entering the season of giving, and what better gift to give than the truth of God’s Word. Will you help us reach your family, friends,...

NEWS
Radio Interview: Why Our Origins Matter
Leading up to ICR’s conference in Boston this weekend, Dr. Randy Guliuzza discusses why what we believe about origins matters to our understanding...

TESTIMONIALS
The Only Reasonable Explanation
Hi, my name is Lauren Pennington, and I work in the accounting department here at ICR. Many in our culture today wholeheartedly accept evolution...

CREATION PODCAST
Evaluating Evolution
Does what we believe about origins matter? ICR Science Writer and speaker Brian Thomas discusses the evidence that persuaded him to reject evolution...

NEWS
Cold Slabs Indicate Recent Global Flood
Since the 1990s, cross-section images of mantle tomography have shown visible slabs of oceanic lithosphere (which includes oceanic crust) descending...