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Recent Publications Roman J Motyka Publications Motyka, R.J., W. P. Dryer, J. M. Amundson, M. Truffer, and M. Fahnestock, 2013, Rapid Submarine Melting Driven by Subglacial Discharge, LeConte Glacier, Alaska. Geophys. Res. Lett., 40, 1–6, doi:10.1002/grl.51011 Straneo, F., P. Heimbach, O. Sergienko, G. Hamilton, G. Catania, S. Griffies, R. Hallberg, A. Jenkins, I. Joughin, R. Motyka, W. T. Pfeffer, S. F. Price, E. Rignot, T. Scambos, M. Truffer, A. Vieliand, 2013, Challenges to understand the dynamic response of Greenland’s marine terminating glaciers to oceanic and atmospheric forcing, Bull. Am. Meteorol. Soc., 94, 1131– 1144, doi:10.1175/BAMS-D-12-00100. Trüssel, B. L. , R. J. Motyka, M. Truffer, C. F. Larsen, 2013. Rapid thinning of lake calving Yakutat Glacier and the collapse of the Yakutat Icefield, Southeast Alaska. Journal of Glaciology, 59(213), 149-161. Mortensen, J., J. Bendtsen, R. J. Motyka, K. Lennert, M. Truffer, M. Fahnestock, and S. Rysgaard, 2013. On the seasonal freshwater stratification in the proximity of fast- flowing tidewater outlet glaciers in a sub-Arctic sill fjord. J. of Geophys. Res.: Oceans, 118, 1–14, doi:10.1002/jgrc.20134. Amundson, J.M., J.F. Clinton, M. Fahnestock, M. Truffer, M.P. Lüthi, and R.J. Motyka, 2012. Observing calving-generated ocean waves with coastal broadband seismometers, Jakobshavn Isbræ, Greenland. Ann. Glaciol., 53(60), 79-85, doi: 10.3189/2012/AoG60A200. Sato, T., Miura, S., Sun, W., Sugano, T., Freymueller, J.T., Larsen, C.F., Ohta, Y., Fujimoto, Inazu, H.D., and Motyka, R.J., 2012. Gravity and uplift rates observed in southeast Alaska and their comparison with GIA model predictions . J. Geophys. Res., 117, B01401, doi:10.1029/2011JB008485. Post, A., S. O’Neel, R. J. Motyka and G. Streveler. 2011. A complex relationship between calving glaciers and climate, EOS, 92(37):305. doi: 10.1029/2011EO370001. Motyka, R. J., M. Fahnestock, M. Truffer, J. Mortensen, and S. Rysgaard, 2011, Submarine melting of the 1985 Jakobshavn Isbrae floating tongue and the triggering of the current retreat, J. Geophys. Res. - Earth Surface, 116, doi:10.1029/2009JF001632. Colgan, W., K. Steffen, W. S. McLamb, W. Abdalati, H. Rajaram, R. Motyka, T. Phillips, and R. Anderson, 2011, An increase in crevasse extent, West Greenland: Hydrologic implications. GEOPHYS. RES. LETT., VOL. 38, L18502, doi:10.1029/2011GL048491. Sato, T., C. F. Larsen, S. Miura, Y. Ohta, H. Fujimoto, W. Sun, R. J. Motyka, J. T. Freymueller, 2011. Reevaluation of the viscoelastic and elastic responses to the past and present-day ice changes in Southeast Alaska. Tectonophysics 511 79–88 Elliott, J. L., C. F. Larsen, J. T. Freymueller, and R. J. Motyka, 2010, Tectonic block motion and glacial isostatic adjustment in southeast Alaska and adjacent Canada constrained by GPS measurements, J. Geophys. Res., 115, B09407, doi:10.1029/2009JB007139. Amundson, J. M., M. Fahnestock, M. Truffer, J. Brown, M.P. L¨uthi, and R.J. Motyka, 2010, Ice melange dynamics and implications for terminus stability, Jakobshavn Isbrae, Greenland. J. Geoph. Res., Earth Surface, 115, F01005, doi:10.1029/2009JF001405. Motyka, R. J., M. Fahnestock, and M. Truffer, 2010, Volume Change of Jakobshavn Isbrae, West Greenland: 1985 – 1997 – 2007. Journal of Glaciology, 56(198), 635-646. Truffer, M., R. J. Motyka, M. Hekkers, I. Howat, and M. King, 2009, Terminus dynamics at an advancing glacier: Taku Glacier, Alaska. Journal of Glaciology, 55(194), 1052-1060, (09J006). Amundson, J M, M. Truffer, M P Leuthi, M Fahnestock, R J Motyka, and M. West, 2008: Glacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbrae, Greenland. Geophys. Res. Lett , VOL. 35, L22501, doi:10.1029/2008GL03528. Harrison, WD, RJ Motyka, and six others, 2008. Another surge of Variegated Glacier, Alaska, USA, 2003/04. Journal of Glaciology, 54(184), 192-194. Motyka, RJ, D Lawson, D Finnegan, G Kalli, B Molnia, and A Arendt, 2008. Hubbard Glacier update: another closure of Russell Fiord in the making? Journal of Glaciology, 54(186), 562- 564. Ritchie, JB, CS Lingle, RJ Motyka, M Truffer, 2008. Seasonal fluctuations in the advance of a tidewater glacier and potential causes: Hubbard Glacier, Alaska, USA. Journal of Glaciology, 54(186), 401-411. Larsen, CF, RJ Motyka, AA Arendt, KA Echelmeyer, and PE Geissler, 2007. Glacier changes in southeast Alaska and northern British Columbia and contribution to sea level rise. J. Geophys.Res., Earth Surface. 112, F01007, doi:10.1029/2006JF000586. Motyka, RJ, and M Truffer, 2007. Hubbard Glacier, Alaska: 2002 Closure of Russell Fjord and implications for future dams. J. Geoph. Res., Earth Surface. 112, F02004, doi:10.1029/2006JF000475. Boyce, ES, RJ Motyka, and M Truffer, 2007. Flotation and Retreat of a Lake-Calving Terminus, Mendenhall Glacier, Southeast Alaska. Journal of Glaciology, 53 (181), 211-222. Motyka, R.J., C.F. Larsen, J.T. Freymueller and K.A. Echelmeyer. 2007. Post Little Ice Age Glacial Rebound in Glacier Bay National Park and Surrounding Areas. Alaska Park Science, 6(1), 36- 41. Benson, C., R. Motyka, S. McNutt, M. Lüthi, M. Truffer. 2007. Glacier-volcano interactions n the North Crater of Mt Wrangell, Alaska. Wieczorek , G.F., E. L. Geist, R. J. Motyka, M. Jakob, 2007. Hazard assessment of the Tidal Inlet landslide and potential subsequent tsunami, Glacier Bay National Park, Alaska. Landslides, DOI 10.1007/s10346-007-0084-1, 11 p. Motyka R. J., M. Truffer, E. M. Kuriger, A. K. Bucki, 2006. Rapid erosion of soft sediments by tidewater glacier advance: Taku Glacier, Alaska, USA, Geophys. Res. Lett., 33, L24504, doi:10.1029/2006GL028467. Kuriger, EM, M Truffer, RJ Motyka, and AK Bucki. 2006. Episodic reactivation of large scale push moraines in front of the advancing Taku Glacier, Alaska. J. Geoph. Res., 111(F1), doi:10.1029/2005JF000385. Larsen, CF, Motyka, RJ, Freymueller, JT, Echelmeyer, KA, Ivins, ER, 2005. Rapid viscoelastic uplift in southeast Alaska caused by post-Little Ice Age glacial retreat. Earth and Planetary Science Letters 237, 548– 560. Larsen, CF, RJ Motyka, JT Freymueller, KA Echelmeyer, and ER Ivins, 2004. Rapid uplift of southern Alaska caused by recent ice loss. Geoph. Journ. Internat., 158, 1118-1133. Motyka, RJ, L Hunter, K Echelmeyer, and C Connor, 2003. Submarine melting at the terminus of a temperate tidewater glacier, LeConte Glacier, Alaska. Annals of Glaciology, 36, 57-65. Motyka, RJ, 2003. Post little ice age uplift at Juneau, Alaska reconstructed from dendrochronology and geomorphology. Quatern. Res., 59, 300-309. Motyka, R. J. and Echelmeyer, K. A.., 2003. Taku Glacier on the move again: Active deformation of proglacial sediments. Journal of Glaciology, 10(164), 50-59. O’Neel, S, K Echelmeyer, and RJ Motyka, 2003. Short-term variations in calving at a retreating tidewater glacier: LeConte Glacier, Alaska. Journal of Glaciology, (12), 587-598. Larsen, C. F., Freymueller, J. T., Echelmeyer, K. A., and Motyka, R. J., 2003. Tide gauge records of uplift along the Northern Pacific-North American Plate Boundary, 1937 to 2001. Journal of Geophysical Research, 108(B4), 2216-2231. Motyka, RJ, S O'Neel, C Connor, and KA Echelmeyer, 2002. 20th Century thinning of Mendenhall Glacier, Alaska, and its relationship to climate, lake calving, and glacier run-off. Global and Planetary Change, 35(1-2) 93-112. O'Neel, S, K Echelmeyer, and RJ Motyka, 2001. Short-term flow dynamics of a retreating tidewater glacier: LeConte Glacier, Alaska, U.S.A. Journal of Glaciology, 47(159), 567-578. Truffer, M., R.J. Motyka, W. D. Harrison, K. A. Echelmeyer, B. Fisk, S. Tulaczyk, 1999. Subglacial drilling at Black Rapids Glacier, Alaska, U.S.A.: drilling method and sarnple descriptions. Journal of Glaciology, Vol. 45, No. 151. Field Guides: Motyka, RJ, J Amundson, and R.Hock, 2012, Field Guide for Excursions. IGS International Symposium Mountain Glaciers and Ice Sheets in a Warming Climate, Fairbanks to Valdez and Columbia Glacier. June 2012, Fairbanks, Alaska, 38p. Connor, C.L. and R. J. Motyka, R.J., 2009: Quaternary Geology of Southeast Alaska and Juneau: FOP 2008 Fieldtrip Guide Alaska Cell of the Friends of the Pleistocene. Alaska Quaternary Center, http://www.uaf.edu/aqc/. Motyka, RJ, DJ Barclay, and KA Echelmeyer, 2002, Field Guide for Excursions: Yakutat Forelands and Glaciers. IGS International Symposium on Fast Glacier Flow, June 2002, Yaktutat, Alaska, 48p. Some PUBLICATIONS while at ADGGS Beget, J.E., and R.J. Motyka, 1998: New dates on Late Pleistocene dacitic tephra from the Mount Edgecumbe volcanic Field, Southeastern Alaska. Quaternary Research, 49, 123-125. Motyka, R.J., and J.E. Beget, 1996: Taku Glacier, southeast Alaska, U.S.A.: Late Holocene history of a tidewater glacier. Arctic and Alpine Research, v. 28, no. 1, pp. 42-51. Motyka, R. J., and Post, Austin,1995: Taku Glacier: influence of sedimentation, accumulation to total area ratio, and channel geometry on the advance of a fiord-type glacier. In Engstrom, D. R. (ed.), Proceedings of the Third Glacier Bay Science Symposium, September 14-18, 1993, National Park Service, Anchorage, pp 38-45. Nolan, M., Motyka, R. J., Echelmeyer, K., and Trabant, D. C., 1995: Ice thickness measurements of Taku Glacier, Alaska, and their relevance to its recent behavior. Journal of Glaciology, v. 41, no. 139, pp. 541-553. Post, A., and Motyka, R. J., 1995: Taku and LeConte Glaciers, Alaska: calving speed control of late Holocene asynchronous advances and retreats. In Nelson, F. E. (ed.), Glaciers and Late Quaternary Environments of Alaska: I, Essays in Honor of William O. Field. Physical Geography, v. 16, pp. 59-82. Motyka, R.J., Noll R.S., and Trabant, D.A.,1992, Taku Glacier. Alaska Division of Geological and Geophysical Surveys Information Circular 34, 1 sheet. Motyka authored or coauthored 48 publications during 16 years at Alaska Division of Geological & Geophysical Surveys (mostly on volcanoes and geothermal topics) including journal articles (15), geologic reports (19), and conference proceedings (14).
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