TY - JOUR T1 - Where Glaciers Meet Water: Subaqueous Melt and its Relevance to Glaciers in Various Settings JF - Reviews of Geophysics Y1 - 2016 A1 - Truffer, M. A1 - Motyka, Roman KW - 10.1002/2015RG000494 and glaciers KW - calving KW - melt KW - ocean UR - http://doi.wiley.com/10.1002/2015RG000494 ER - TY - JOUR T1 - Dynamic jamming of iceberg-choked fjords JF - Geophys. Res. Lett. Y1 - 2015 A1 - Peters, I A1 - Amundson, J. M. A1 - Cassotto, R A1 - Fahnestock, M A1 - Darnell, K A1 - Truffer, M. A1 - Zhang, W. KW - 10.1002/2014GL062715 and glaciers KW - calving KW - icebergs KW - jamming VL - 42 ER - TY - CHAP T1 - Glacier Surges T2 - Snow and Ice-Related Hazards, Risks, and Disasters Y1 - 2014 A1 - Harrison, W.D. A1 - Osipova, G.B. A1 - Nosenko, G.A. A1 - Espizua, L. A1 - Kääb, A. A1 - L Fischer  A1 - Huggel, C. A1 - Craw Burns, P.A. A1 - Truffer, M. A1 - Lai, A.W. KW - Flow instabilities KW - Ice dammed lakes KW - Outburst floods KW - Pipeline safety KW - River blocking KW - surge-type glaciers AB - © 2015 Elsevier Inc. All rights reserved.Surge-type glaciers periodically undergo large flow acceleration after extended quiescent phases of slow movement, usually accompanied by terminus advance. Such glaciers are relatively rare but occur in many of the world's glacierized areas. High water pressures and extreme basal sliding are obvious characteristics but key questions concerning this, usually spectacular phenomenon, remain open. Why are glaciers in some regions surge-type but not in others, what sort of "memory" lets glaciers surge again and again, what is the influence of climate, geology, and topography? Besides their scientific interest, glacier surges can also be a threat to humans, especially in connection with rapidly forming lakes and their sudden outbursts. Cases of hazard- and disaster-related glacier surges are described from the Pamirs, the Andes, the Italian Alps, and Alaska. JF - Snow and Ice-Related Hazards, Risks, and Disasters SN - 9780123964731 ER - TY - JOUR T1 - Surface Drifters Track the Fate of Greenland Ice Sheet Meltwater JF - Eos Trans. AGU Y1 - 2014 A1 - Hauri, C. A1 - Truffer, M. A1 - Winsor, P. A1 - Lennert, K. VL - 95 ER - TY - JOUR T1 - Channelized ice melting in the ocean boundary layer beneath Pine Island Glacier, Antarctica. JF - Science (New York, N.Y.) Y1 - 2013 A1 - Stanton, T P A1 - Shaw, W J A1 - Truffer, M. A1 - Corr, H F J A1 - Peters, L E A1 - Riverman, K L A1 - Bindschadler, R A1 - Holland, D M A1 - Anandakrishnan, S KW - Antarctic Regions KW - Freezing KW - Ice Cover KW - Oceans and Seas AB - Ice shelves play a key role in the mass balance of the Antarctic ice sheets by buttressing their seaward-flowing outlet glaciers; however, they are exposed to the underlying ocean and may weaken if ocean thermal forcing increases. An expedition to the ice shelf of the remote Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet that has rapidly thinned and accelerated in recent decades, has been completed. Observations from geophysical surveys and long-term oceanographic instruments deployed down bore holes into the ocean cavity reveal a buoyancy-driven boundary layer within a basal channel that melts the channel apex by 0.06 meter per day, with near-zero melt rates along the flanks of the channel. A complex pattern of such channels is visible throughout the Pine Island Glacier shelf. VL - 341 UR - http://www.ncbi.nlm.nih.gov/pubmed/24031016 ER - TY - JOUR T1 - Rapid thinning of lake-calving Yakutat Glacier and the collapse of the Yakutat Icefield, southeast Alaska, USA JF - J. Glaciol. Y1 - 2013 A1 - Trüssel, Barbara L. A1 - Motyka, Roman J. A1 - Truffer, M. A1 - Larsen, C. F. VL - 59 UR - http://www.igsoc.org/journal/59/213/t12J081.html ER - TY - JOUR T1 - Analysis of low-frequency seismic signals generated during a multiple-iceberg calving event at Jakobshavn Isbræ, Greenland JF - Journal of Geophysical Research Y1 - 2012 A1 - Walter, F. A1 - Amundson, J. M. A1 - O'Neel, S. A1 - Truffer, M. A1 - Fahnestock, M.A. A1 - Fricker, H. A. KW - calving KW - glacier KW - iceberg KW - seismology VL - 117 UR - http://www.agu.org/pubs/crossref/2012/2011JF002132.shtml ER - TY - JOUR T1 - Observing calving-generated ocean waves with coastal broadband seismometers, Jakobshavn Isbræ, Greenland JF - Annals Of Glaciology Y1 - 2012 A1 - Amundson, J. M. A1 - Clinton, John F A1 - Fahnestock, M.A. A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Lüthi, Martin P. VL - 53 ER - TY - JOUR T1 - Seasonal to decadal scale variations in the surface velocity of Jakobshavn Isbrae, Greenland: Observation and model-based analysis JF - J. Geophys. Res. Y1 - 2012 A1 - Joughin, Ian A1 - Smith, B. E. A1 - Howat, I. M. A1 - Floricioiu, Dana A1 - Alley, Richard B. A1 - Truffer, M. A1 - Fahnestock, M.A. KW - glacier KW - glaciology KW - ice stream VL - 117 UR - http://www.agu.org/pubs/crossref/2012/2011JF002110.shtml ER - TY - JOUR T1 - Episodic reactivation of large-scale push moraines in front of the advancing Taku Glacier, Alaska JF - J. Geophys. Res. Y1 - 2006 A1 - Kuriger, Elsbeth Maria A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Bucki, Adam K. VL - 111 UR - http://www.agu.org/pubs/crossref/2006/2005JF000385.shtml ER - TY - JOUR T1 - In situ measurements of till deformation and water pressure JF - J. Glaciol. Y1 - 2006 A1 - Truffer, M. A1 - Harrison, W.D. VL - 52 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=52{&}issue=177{&}spage=175 ER - TY - JOUR T1 - Rapid erosion of soft sediments by tidewater glacier advance: Taku Glacier, Alaska, USA JF - Geophys. Res. Lett. Y1 - 2006 A1 - Motyka, Roman J. A1 - Truffer, M. A1 - Kuriger, Elsbeth Maria A1 - Bucki, Adam K. VL - 33 UR - http://www.agu.org/pubs/crossref/2006/2006GL028467.shtml ER - TY - JOUR T1 - Time-dependent basal stress conditions beneath Black Rapids Glacier, Alaska, USA, inferred from measurements of ice deformation and surface motion JF - J. Glaciol. Y1 - 2006 A1 - Amundson, J. M. A1 - Truffer, M. A1 - Lüthi, Martin P. VL - 52 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=52{&}issue=178{&}spage=347 ER - TY - JOUR T1 - The basal speed of valley glaciers: an inverse approach JF - J. Glaciol. Y1 - 2004 A1 - Truffer, M. VL - 50 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=50{&}issue=169{&}spage=236 ER - TY - JOUR T1 - Probing the till beneath Black Rapids Glacier, Alaska, USA JF - J. Glaciol. Y1 - 2004 A1 - Harrison, W.D. A1 - Truffer, M. A1 - Echelmeyer, K. A. A1 - Pomraning, D. A. A1 - Abnett, K. A. A1 - Ruhkick, R. H. VL - 50 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=50{&}issue=171{&}spage=608 ER - TY - JOUR T1 - Of isbræ and ice streams JF - Ann. Glaciol. Y1 - 2003 A1 - Truffer, M. A1 - Echelmeyer, K. A. VL - 36 ER - TY - JOUR T1 - A surface motion survey of Black Rapids Glacier, Alaska, U.S.A. JF - Ann. Glaciol. Y1 - 2003 A1 - Fatland, Dennis R. A1 - Lingle, Craig S. A1 - Truffer, M. VL - 36 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0260-3055{&}volume=36{&}issue=1{&}spage=29 ER - TY - JOUR T1 - Mechanisms of fast flow in Jakobshavns Isbræ, Greenland, Part III: Measurements of ice deformation, temperature and cross-borehole conductivity in boreholes to the bedrock JF - J. Glaciol. Y1 - 2002 A1 - Lüthi, Martin P. A1 - Funk, M. A1 - Iken, A. A1 - Truffer, M. A1 - Gogineni, S. VL - 48 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=48{&}issue=162{&}spage=369 ER - TY - JOUR T1 - Implications of till deformation on glacier dynamics JF - J. Glaciol. Y1 - 2001 A1 - Truffer, M. A1 - Echelmeyer, K. A. A1 - Harrison, W.D. VL - 47 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=47{&}issue=156{&}spage=123 ER - TY - JOUR T1 - Glacier motion dominated by processes deep in underlying till JF - J. Glaciol. Y1 - 2000 A1 - Truffer, M. A1 - Harrison, W.D. A1 - Echelmeyer, K. A. VL - 46 UR - http://openurl.ingenta.com/content/xref?genre=article{&}issn=0022-1430{&}volume=46{&}issue=153{&}spage=213 ER - TY - JOUR T1 - Subglacial drilling at Black Rapids Glacier, Alaska, U.S.A : drilling method and sample descriptions JF - J. Glaciol. Y1 - 1999 A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Harrison, W.D. A1 - Echelmeyer, K. A. A1 - Fisk, B. A1 - Tulaczyk, S. VL - 45 ER - TY - JOUR T1 - The relationship between subglacial water pressure and velocity of Findelengletscher, Switzerland, during its advance and retreat} volume = {43 JF - Journal of Glaciology Y1 - 1997 A1 - Iken, A. A1 - Truffer, M. AB - Findelengletscher, Switzerland, advanced about 250 m between 1979$\backslash$nand 1985, and retreated thereafter. Subglacial water pressure, surface$\backslash$nvelocity and surface strain rate were determined at several sites.$\backslash$nThe measurements were made early in the melt seasons of 1980, 1982,$\backslash$n1985 and 1994 and in the autumn of 1983 and the winter of 1984. Changes$\backslash$nof surface geometry were assessed from aerial photographs. The estimated$\backslash$nbasal shear stress changed little between 1982 and 1994. Nevertheless,$\backslash$nlarge changes in the relationship of subglacial water pressure and$\backslash$nsurface velocity were observed, which cannot be reconciled with the$\backslash$nmost commonly used sliding law unless it is modified substantially$\backslash$nConsideration of possible reasons indicates that a change in the$\backslash$nsubglacial drainage system occurred, probably involving a change$\backslash$nin the degree of cavity interconnection. Isolated cavities damp the$\backslash$nvariations in sliding velocity that normally result from changes$\backslash$nin water pressure, because the pressure in isolated cavities decreases$\backslash$nas the sliding speed increases. In contrast, by transmitting water-pressure$\backslash$nfluctuations to a larger area of the bed, interconnected cavities$\backslash$namplify the effect of water-pressure fluctuations on sliding speed.$\backslash$nThus, we suggest that an observed decrease in velocity (for a given$\backslash$nwater pressure) between 1982 and 1994 was a consequence of a decrease$\backslash$nin the interconnectedness of the subglacial cavity system. SN - 0022-1430 ER -