Group assembles for outdoor, socially-distanced conference

The UI Glacier Dynamics Group gathered for three afternoons, Oct 14-16, in Tim’s driveway and garage to participate in the annual Northwest Glaciologists’ meeting.

Ph.D. candidate Chris Miele presented his latest results from floating ice shelves, and discussed the implications of his findings on glacier retreat in Greenland and Antarctica. Group leader Tim Bartholomaus introduced the new Turner Glacier surge project to the assembled research community.

It was great fun to gather in person, after months of time apart, and actually spend some time in community again- both together, and with the broader community of glaciologists in the Northwest.

PhD student opp. to study calving in Greenland

The glacier dynamics group at the University of Idaho seeks a Ph.D. student to pursue research into the factors controlling iceberg calving around the Greenland Ice Sheet.  This NSF funded project, with Co-PI Dr. Ellyn Enderlin of UMaine, will draw on a wide variety of remotely sensed imagery, oceanographic data, and timelapse photography to evaluate terminus boundary conditions (calving laws) used by ice flow models.  These calving laws predict terminus positions and calving rates (formally: “frontal ablation rates”) around the ice sheet.  Increases in calving and submarine melt rates at the marine termini of Greenland’s tidewater outlet glaciers lead to the most rapid rates of ice loss from around the ice sheet, and therefore to acceleration in the rate of sea level rise.  Outcomes from this project will include: 1) New, mechanistic understanding of the drivers of terminus ice loss in the diversity of settings around Greenland; and 2) Model improvements in the handling of calving, thus directly leading to improved predictions of ice sheet change and sea level rise.

The successful applicant will join a growing lab group with two other graduate students in fall 2018, including a masters student working on a portion of this calving law project.  Collaboration with this student and Dr. Enderlin, and support from others in the group, provides a rich and varied research experience.  The student would additionally work towards completion of a Ph.D. within the Dept. of Geological Sciences at the Univ. of Idaho, a group of researchers with strong backgrounds in geophysics, climate change, remote sensing, numerical modeling, and statistics.  The University’s location in Moscow, ID, adjacent to the northern rockies, is an exciting and diverse geologic region with ample opportunities for diverse outdoor recreation.

This position includes two years of financial, educational, and benefits support through a research assistantship, with subsequent years of support through teaching assistantships.  Ph.D. student applicants with backgrounds in programming (python, matlab, r, etc.), geographic data analysis, and strong quantitative skills are preferred.

Expressions of interest are requested by Friday, March 2nd.  Please email a short statement of interest, a CV, and transcripts (unofficial is fine) to Dr. Timothy Bartholomaus.  Additional information about the group and the graduate school application process is available at this link and this link.  Following the statement of interest, complete applications for this opportunity should be submitted to the College of Graduate Studies prior to the project-specific deadline of March 9th.

Glaciology student wins college-wide award

posted in: Outreach, Research, Teaching | 0

Congratulations to Margot Vore for winning the “Outstanding Research Poster” award at the annual UIdaho College of Science student research fair!  Margot’s presentation was obviously very well received by all who stopped at her poster during the October 27 event.

Enthusiasts of glaciohydraulic tremor who missed the research fair can catch the latest at Margot’s oral presentation in the cryoseismology session at AGU this December, in New Orleans.  Bravo!

Margot receives her award from College of Science Dean Ginger Carney
Margot receives her award from College of Science Dean Ginger Carney

Research group presents at Northwest Glaciologists in Vancouver, BC

The UI Glacier Dynamics Group traveled to the annual meeting of Northwest Glaciologists in mid-October to present their latest research and share ideas with other regional glaciologists.  Univ. of Idaho grad students Margot Vore and Tristan Amaral made excellent presentations of their latest work.  Colleagues at the University of British Columbia and Simon Fraser University were wonderful hosts, and Vancouver, BC, treated us to glorious weather.  We’re looking forward to future years of this favorite gathering of the minds.

Margot Vore presents her research on the seismic signals produced by subglacial water flow.
Margot Vore presents her research on the seismic signals produced by subglacial water flow.

U Idaho group presents and participates in international workshops

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It’s been a busy summer for the Glacier Dynamics group, with a number of high-profile presentations focused around glacier seismology.

In June, Tim participated in back to back workshops on Environmental Seismology, then taught during a weeklong summer course on Glacier Seismology.  During the Environmental Seismology workshop, Tim gave one of the evening keynote lectures, during which he presented an overview of his and others efforts to use seismology to better understand glaciological processes.  The workshop took place in Bavaria, Germany, and was attended by approximately 60 international scientists, many of which took part in the excellent field trip to a rockfall monitoring site in the alps.

Following the meeting in Germany, Tim flew straight to Fort Collins, CO, for the Glacier Seismology course to present on glacier hydrology, iceberg calving, and the seismic signals produced through these mechanisms.  Margot, a member of our lab, participated as a sponsored student in the Glacier Seismology course, and presented her research to date on Taku Glacier during the course.

 

A slide from the wrap-up to the Environmental Seismology workshop playfully illustrates the mechanism by which falling icebergs produce calving icequakes [Bartholomaus et al., 2012]
 

Environmental seismologists return from their field trip in the alps.

Understanding subglacial hydrology through seismology

Last week, I visited the Boise State Geosciences department to give a seminar on the use of seismology to understand subglacial water flow and sediment transport.  I reviewed two of my recent papers, published in GRL (this in 2015, and this in 2016), and also presented some of the initial results from my work with graduate student, Margot Vore, from Taku Glacier.  I enjoyed getting to know some other Idaho geophysicists and identifying new opportunities for collaboration.

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Glacier Dynamics at the University of Idaho

This fall, I’ve moved to the University of Idaho to begin work as an Assistant Professor and expand my lab group.  I’ve begun working with a graduate student who will work with glaciohydraulic tremor data to better understand changes in subglacial hydrologic processes.  Moscow, ID, home to the university, is a great town and I’m looking forward to getting to know the community and landscape while I establish my research here.

Please get in touch if you’re interested in joining my glacier dynamics group as a grad student or postdoc, or otherwise collaborating.

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Seismology for glaciology

posted in: Outreach, Research | 0

I’ll be giving a talk in the plenary session on Renaissance Seismology: Seismology for Non-Traditional Targets at the upcoming IRIS National Workshop, in Vancouver, WA.  I’m looking forward to sharing my perspectives on the tremendous utility of seismology for glacier problems, and learning about the latest seismological research and techniques.  I’m also happy about this being a short trip.  It’s my first meeting out of my new home in Moscow, ID, where I’ll start as an Assistant Professor at the University of Idaho in the fall.

IRIS is the national coordinating body for seismological research in the US – it stands for Incorporated Research Institutions for Seismology.

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Press write-up of AGU presentation

One of my two presentations at the AGU fall meeting this year is the subject of a well done blog post.  In the presentation, my co-authors and I reported the detection of over one million icequakes produced near the terminus of a tidewater glacier in west Greenland.  Study of these icequakes will allow us to better understand the factors controlling the flow of glacier ice, and ultimately allow scientists to make more precise predictions of sea level rise.

We’re presently about half way through the meeting this year and its been a good week so far.  During the Saturday and Sunday prior to the beginning of the AGU fall meeting, I participated in a planning workshop to lay the groundwork for a monitoring network to observe ice-ocean interactions in Greenland.  I made the case for the value of seismology in understanding tidewater glacier dynamics.

My second invited presentation is a poster on Thursday afternoon. I’ll be sharing observations and interpretations of high-rate velocity variations near the front of one of Greenland’s largest ocean-terminating glaciers.  The presentation is C43B-0805 High-resolution, terrestrial radar velocity observations and model results reveal a strong bed at stable, tidewater Rink Isbræ, West Greenland.

 

 

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A seismometer deployed at the terminus of a west Greenland glacier for two years, between 2013 and 2015. This station recorded over a million icequakes, year-round.