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dc.contributor.authorAmundson, Jason M.
dc.contributor.authorTruffer, M.
dc.contributor.authorLuthi, M. P.
dc.contributor.authorFahnestock, M.
dc.contributor.authorWest, M.
dc.contributor.authorMotyka, R. J.
dc.date.accessioned2020-04-30T17:58:07Z
dc.date.available2020-04-30T17:58:07Z
dc.date.issued2008-11-18
dc.identifier.citationAmundson, J. M., M. Truffer, M. P. Lu ̈thi, M. Fahnestock, M. West, and R. J. Motyka (2008), Glacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbræ, Greenland, Geophys. Res. Lett., 35, L22501, doi:10.1029/ 2008GL035281.en_US
dc.identifier.urihttp://hdl.handle.net/11122/11043
dc.descriptionThe recent loss of Jakobshavn Isbræ’s extensive floating ice tongue has been accompanied by a change in near terminus behavior.en_US
dc.description.abstractThe recent loss of Jakobshavn Isbræ’s extensive floating ice tongue has been accompanied by a change in near terminus behavior. Calving currently occurs primarily in summer from a grounded terminus, involves the detachment and overturning of several icebergs within 30 – 60 min, and produces long-lasting and far-reaching ocean waves and seismic signals, including ‘‘glacial earthquakes’’. Calving also increases near-terminus glacier velocities by 3% but does not cause episodic rapid glacier slip, thereby contradicting the originally proposed glacial earthquake mechanism. We propose that the earthquakes are instead caused by icebergs scraping the fjord bottom during calving.en_US
dc.description.sponsorshipWe thank J. Brown and D. Maxwell for field assistance, and S. Anandakrishnan, A. Behar, and R. Fatland for loaning GPS receivers. Comments from editor E. Rignot and reviewers S. O’Neel and T. Pfeffer improved the manuscript. Logistics and instrumental support were provided by VECO Polar Resources, UNAVCO, and PASSCAL. Seismic analysis was done with the Matlab waveform object package written by C. Reyes (http://www.giseis.alaska.edu/Seis/EQ/tools/matlab/). Funding was provided by NASA’s Cryospheric Sciences Program (NNG06GB49G), the U.S. National Science Foundation (ARC0531075), the Swiss National Science Foundation (200021-113503/1), the Comer Science and Education Foundation, and a CIFAR IPY student fellowship under NOAA cooperative agreement NA17RJ1224 with the University of Alaska.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectglaciersen_US
dc.subjectcalvingen_US
dc.subjectseismic responseen_US
dc.subjectlarge calving eventsen_US
dc.subjectfjorden_US
dc.subjectGreenlanden_US
dc.subjectJakobshavn Isbræen_US
dc.subjectoutlet glaciersen_US
dc.subjectgrounded terminusen_US
dc.subjectterminusen_US
dc.subjectearthquakesen_US
dc.titleGlacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbræ, Greenlanden_US
dc.typeArticleen_US
dc.description.peerreviewYesen_US
refterms.dateFOA2020-04-30T17:58:07Z
dc.identifier.journalGeophysical Research Lettersen_US


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