Glaciology Commons^™

Toward The Significance Of Crevasse Orientation In Low And High Crevassed Regions On The Kennicott Glacier, Alaska, Usa, Claire A. Sturm

DePaul Discoveries

Supraglacial landforms serve as potential indicators of underlying bedrock morphology and glacier dynamics. The distribution and morphology of crevasses are closely associated with stress fields and ice-flow regimes, representing processes of stable glaciers, in contrast to their reduced occurrence in stagnant or receding ice masses. The orientation and density of crevasses influence a glacier’s ability to absorb solar energy, as they facilitate movement of meltwater down to subglacial rivers. Beyond the meltwater acting as a lubricant for basal sliding, the slope of the bedrock further impacts the local velocity and ice deformation of a glacier. The study of ice-fracturing mechanics …

Glacial Isostatic Adjustments And Their Impact On Sea-Level Predictions, Dayne M. Williams, Jeanne Sumrall

SACAD: Scholarly Activities

Relative sea level adjustments and their effects directly contribute to modern day climate change and ocean knowledge. This is shown through Glacial isostatic adjustment models which depend on ice thickness, time period, and core analyzations within a local region. These models demonstrate a direct correlation between RSL, era of retreat, and ice thickness even with comparison of other similar models, with some minor discrepancies. These discoveries led to several new advancements within the field of glaciology regionally and nationally. Generally concluding that the research done isn’t sufficient and more data regionally is needed to study its impacts more detailed.

Glacial Resource Analysis – Castner Glacier, Alaska, Logan Erichsen

SACAD: Scholarly Activities

Glaciers cover much of the 49th U.S. state of Alaska. While many of these are deep blues, just as many are “rock” glaciers which means the glacier is covered in sediment. This sediment can be transported many miles through the mountain ranges. With the current climate melting these glaciers they are receding. Sediment and rock samples can now be safely collected from different locations where glaciers have released sediment that was locked in the ice for an untold number of years. Much of the USGS data comes from the 1940’s through 1960’s due to the size and remoteness of Alaska. …

Giovanni Badino (1953-2017), Arrigo Cigna, Paolo Forti

International Journal of Speleology

Short obituary of Giovanni Badino.

Teleconnections In Steam: Antarctic Field-Camp Art, Craig Stevens, Gabby O'Connor

The Transdisciplinary STEAM+ Journal

We describe a component of a multi-element STEAM collaboration looking to explore ideas around the life cycle of Antarctic sea ice. One of the intermediate phases of the work involved the scientist deploying partially pre-made art components. Results were modulated by weather and operational constraints and generated a sequence of images and recordings as well as greater understanding of the creative collaboration process.

Trajectory Analysis Of Black Carbon In The Arctic Region, Kimberly Gottschalk

PSU McNair Scholars Online Journal

Black carbon (BC) is a troubling particulate. Commonly known as soot, BC forms through the incomplete combustion of fossil fuels, biofuels, and biomass. It has a very low albedo compared to natural particulates making it a very efficient absorber of solar radiation. As BC is deposited on snow and ice, albedo is decreased - enhancing solar heating and increasing meltwater production. With rising air temperatures, melting rates of polar ice are increasing and are being enhanced by BC, leading to accelerated global sea level rise.

This study aimed to document sources and deposition areas of BC in the Arctic. Utilizing …

Apparent Glacially Induced Structural Controls On Limestone Conduit Development In Ohio Caverns, United States, Adrienne M. Watts, Ira D. Sasowsky

International Journal of Speleology

Rock discontinuities such as bedding planes and joints are important controls on the form that caves take. We examined structural controls on the development of Ohio Caverns. The cave formed in Devonian limestone underlying a small bedrock knob (Mt. Tabor) within the Interior Lowland province, United States. The area has been overridden by continental glaciation multiple times. The bedrock is pervasively fractured, with many curved and wavy near-vertical fractures showing many different orientations. In the case of Ohio Caverns, it appears that the controlling fractures in map view may not be joints sensu stricto, but rather some combination of …

Origin And Developmental History Of Minnesota Lakes, H. E. Wright Jr.

Journal of the Minnesota Academy of Science

ABSTRACT-Most lakes in Minnesota owe their origin directly or indirectly to glacial deposition or erosion 10,000 to 20,000 years ago. The lakes' shapes have since been modified by waves and currents near the shores and by the deposition of sediment off-shore-principally the sediment produced by growth of algae and other organisms. This sediment is a receptacle for pollen grains blown into the lake from the surrounding vegetation, and the stratigraphic succession of pollen grains records the postglacial vegetational and thus climatic history of the area. The sediment also preserves the fossils of microorganisms that reveal by their chemical composition the …

A Search For Ddt Residues In The Juneau Icefield, Alaska, Jon Edwin Barber, Russell S. Adams Jr.

Journal of the Minnesota Academy of Science

The objectives of this study were: 1) to determine if DDT residues occurred in the ice of the Juneau Icefield, and 2) to devise a simple, inexpensive method of sampling glacial ice for pesticide residues. No DDT was found in the samples of ice collected strata spanning the 1963 to 1970 period. However, phthalate plasticizers were found in all samples and were assumed to be· due to contamination during collection. The elution time of the phthalate by gas chromatography was identical to that of p, p-DDT. Conversion of DDT to DDD by ultraviolet light was found to remove the phthalate. …

Glacial Drift Stratigraphy: New London-Spicer Area, Minnesota, D. B. Anderson, L. G. Soroka

Journal of the Minnesota Academy of Science

No abstract provided.

Glacial Lake Evidence In Western Minnesota As Interpreted From The Soil Survey, Raymond T. Diedrick, Richard H. Rust

Journal of the Minnesota Academy of Science

Soil surveys in several counties in western Minnesota have revealed a soils pattern which provides geomorphic evidence for a previously unrecognized glacial lake. This glacial lake, here called Glacial Lake Benson, is about 60 miles long, 40 miles wide and of almost one million acres in area. Soils along its northern boundary are generally developed in coarse outwash. The central and southern portions of the lake basin have well-sorted silty soils, similar to those in Glacial Lake Agassiz. The elevation of the outer edge of the Benson basin is about 1,050 feet. Topographic maps were used to prepare transects which …

Tamaracks And Their Relation To Glacial Geology - A Study Of The Rockville-Cold Spring Area, Gerald R. Ahlquist

Journal of the Minnesota Academy of Science

No abstract provided.

Geologic Dating And The Time Scale Of The Ice Age, H. E. Wright Jr.

Journal of the Minnesota Academy of Science

No abstract provided.

Forests And Glaciers Of Southern Alaska, William S. Cooper

Journal of the Minnesota Academy of Science

No abstract provided.

Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson

Journal of the Minnesota Academy of Science

No abstract provided.

Englacial And Superglacial Drift In Minnesota, The Dakotas, And Manitoba, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

Glacial And Modified Drift Of The Mississippi Valley From Lake Itasca To Lake Pepin, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

Changes In The Currents Of The Ice Of The Last Glacial Epoch In Eastern Minnesota, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

Lake Agassiz: A Chapter In Glacial Geology, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.