Iceberg calving during transition from grounded to floating ice: Columbia Glacier, Alaska
Geophysical Research Letters
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Abstract
The terminus of Columbia Glacier, Alaska, unexpectedly became ungrounded in 2007 during its prolonged retreat. Visual observations showed that calving changed from a steady release of low-volume bergs, to episodic flow-perpendicular rifting, propagation, and release of very large icebergs - a style reminiscent of calving from ice shelves. Here, we compare passive seismic and photographic observations through this transition to examine changes in calving. Mechanical changes accompany the visible changes in calving style post flotation: generation of seismic energy during calving is substantially reduced. We propose this is partly due to changes in source processes.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Iceberg calving during transition from grounded to floating ice: Columbia Glacier, Alaska |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2010GL043201 |
| Volume | 37 |
| Issue | 15 |
| Year Published | 2010 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Alaska Science Center |
| Description | 5 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Research Letters |
| Country | United States |
| State | Alaska |
| Other Geospatial | Columbia Glacier |
| Online Only (Y/N) | Y |
| Google Analytic Metrics | Metrics page |