Oceanography The Official Magazine of
The Oceanography Society
Volume 25 Issue 03

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Volume 25, No. 3
Pages 104 - 105

SIDEBAR • Listening to Glaciers: Passive Hydroacoustics Near Marine-Terminating Glaciers

Erin C. Pettit Jeffrey A. Nystuen Shad O’Neel
First Paragraph

The catastrophic breakup of the Larsen B Ice Shelf in the Weddell Sea in 2002 paints a vivid portrait of the effects of glacier-climate interactions. This event, along with other unexpected episodes of rapid mass loss from marine-terminating glaciers (i.e., tidewater glaciers, outlet glaciers, ice streams, ice shelves) sparked intensified study of the boundaries where marine-terminating glaciers interact with the ocean. These dynamic and dangerous boundaries require creative methods of observation and measurement. Toward this effort, we take advantage of the exceptional sound-propagating properties of seawater to record and interpret sounds generated at these glacial ice-ocean boundaries from distances safe for instrument deployment and operation.

Citation

Pettit, E.C., J.A. Nystuen, and S. O’Neel. 2012. Listening to glaciers: Passive hydroacoustics near marine-terminating glaciers. Oceanography 25(3):104–105, https://doi.org/10.5670/oceanog.2012.81.

References

Burton, J.C., J.M. Amundson, D.S. Abbot, A. Boghosian, L.M. Cathles, S. Correa-Legisos, K.N. Darnell, N. Guttenberg, D.M. Holland, and D.R. MacAyeal. 2011. Laboratory investigations of iceberg capsize dynamics, energy dissipation and tsunamigenesis. Journal of Geophysical Research 117, F01007, https://doi.org/10.1029/2011JF002055.

Fountain, A.G., and J.S. Walder. 1998. Water flow through temperate glaciers. Reviews of Geophysics 36(3):299–328, https://doi.org/10.1029/97RG03579.

MacAyeal, D., T. Scambos, C.L. Hulbe, and M.A. Fahnestock. 2003. Catastrophic ice-shelf break-up by an ice-shelf-fragment-capsize mechanism. Journal of Glaciology 49(164):22–36, https://doi.org/10.3189/172756503781830863.

MacAyeal, D.R., E.A. Okal, R.C. Aster, and J.N. Bassis. 2009. Seismic observations of glaciogenic ocean waves (micro-tsunamis) on icebergs and ice shelves. Journal of Glaciology 55(190):193–206, https://doi.org/10.3189/002214309788608679.

Medwin, H. 2005. Sounds in the Sea: From Ocean Acoustics to Acoustical Oceanography. Cambridge University Press, 664 pp.

Pettit, E. 2012. Passive underwater acoustic evolution of a calving event. Annals of Glaciology 53(60):113–122, https://doi.org/10.3189/2012AoG60A137.

Pettit, E.C., J.A. Nystuen, S. O’Neel, J. Brann, and T. Bartholomaus. 2011. Of bubbles and bergs: Underwater acoustics in tidewater glacier fjords. Paper presented at the International Symposium on Interactions of Ice Sheets and Glaciers with the Ocean, International Glaciological Society, La Jolla, California, June 5–10, 2011.

Spencer, M.K., R.B. Alley, and J.J. Fitzpatrick. 2006. Developing a bubble number-density paleoclimatic indicator for glacier ice. Journal of Glaciology 52(178):358–364, https://doi.org/10.3189/172756506781828638.

West, M., C. Larsen, M. Truffer, S. O’Neel, and L. LeBlanc. 2010. Glacier microseismicity. Geology 38(4):319–322, https://doi.org/10.1130/G30606.1.