Bulletin of the American Physical Society
2023 Spring Meeting of the APS Eastern Great Lakes Section
Volume 68, Number 5
Saturday, April 1, 2023; Oakland University, Rochester, Michigan
Session K01: Poster Session & Snacks (3:30pm-5:00pm EDT)
3:30 PM,
Saturday, April 1, 2023
Oakland University HHB
Room: 4050
Chair: Michael Crescimanno, Department of Physics, Youngstown State University
Abstract: K01.00001 : Effect of Tributary Glacier Surge on Tidewater Terminus Stability: College Fjord, Prince William Sound, Alaska
Presenter:
Jacob Hassan
(College of Wooster)
Author:
Jacob Hassan
(College of Wooster)
The Harvard and Yale Glaciers represent an inverse relationship to each other which grants a key outlook on tidewater glacier dynamics. Over a period of 64 years (1945-2012), Harvard Glacier advanced 28 observable times while Yale Glacier retreated 20 times. With two glaciers in similar climatic, geometric, and hydrothermal forcings, other factors must be considered to better determine the cause(s) of their behavioral differences. To examine the drivers of this relationship, a geospatial analysis was performed using current velocity, thickness, and elevation change data, determining the relationships between each and granting an outlook on overall tidewater glacier behavior from 1985-2018. The results indicated evidence of Alaskan-type surge occurring in Harvard Glacier, as well as in Harvard’s leading tributary, Radcliffe Glacier. Furthermore, there was a positive correlation in the frequency of surges within Harvard and Radcliffe, indicating that Harvard may be highly influenced by increased mass deposition coming from Radcliffe within 1-2 years of increased velocity. These findings highlight the need for further study in the area, with the addition of in-situ data to better determine the causes associated.
The effect that tributary glaciers have on overall tidewater glacier behavior is loosely studied. With the environment presented in College Fjord, the unique situation of tributary glacier surge close to the terminus of the trunk glacier is highlighted. The findings discussed point current research in the direction of these complex basins, with the understanding that these formations are another factor in further understanding temperate tidewater glaciers.
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