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NOWCAST NEWS AND NOTES STUDY REVEALS UNUSUAL across the Helheim Glacier in pressure drop behind each calving GLACIAL MOVEMENT DURING Greenland, which at 6 kilometers iceberg forces the earth upward ALVING wide and more than 200 kilo- and causes the glacier to move With melting glaciers contribut- meters long is one of the largest downward. ing a significant amount to rising glaciers in southeast Greenland. “Imagine that you could go and global sea levels, scientists are The sensors tracked the glacier’s just push on the front of the glacier trying to understand as much as movement and measured velocity with your thumb, really hard, so possible about the physical mecha- and displacement of its surface. hard that you could reverse the nisms of glacial movement. One Ten large calving events—when direction that the front of the recently discovered phenomenon an iceberg breaks off from a glacier glacier is moving,” explains study is the glacial earthquake—a mag- and drops into the water—oc- coauthor Meredith Nettles of the nitude-5+ seismic event that can curred over the span of about two Lamont-Doherty Earth Observa- be detected by instruments across months of monitoring, and each tory, “and then you let it go. And the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
eISSN
1520-0477
DOI
10.1175/1520-0477-96.10.1633
Publisher site
See Article on Publisher Site

Abstract

NEWS AND NOTES STUDY REVEALS UNUSUAL across the Helheim Glacier in pressure drop behind each calving GLACIAL MOVEMENT DURING Greenland, which at 6 kilometers iceberg forces the earth upward ALVING wide and more than 200 kilo- and causes the glacier to move With melting glaciers contribut- meters long is one of the largest downward. ing a significant amount to rising glaciers in southeast Greenland. “Imagine that you could go and global sea levels, scientists are The sensors tracked the glacier’s just push on the front of the glacier trying to understand as much as movement and measured velocity with your thumb, really hard, so possible about the physical mecha- and displacement of its surface. hard that you could reverse the nisms of glacial movement. One Ten large calving events—when direction that the front of the recently discovered phenomenon an iceberg breaks off from a glacier glacier is moving,” explains study is the glacial earthquake—a mag- and drops into the water—oc- coauthor Meredith Nettles of the nitude-5+ seismic event that can curred over the span of about two Lamont-Doherty Earth Observa- be detected by instruments across months of monitoring, and each tory, “and then you let it go. And the

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Oct 1, 2015

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