Knut Christianson

Assistant Professor Department of Earth and Space Sciences University of Washington Seattle, WA 98195, USA Email: [email protected] Phone: 1-814-441-9880 [email protected]

Professional Preparation Ph.D. Geosciences, the Pennsylvania State University, 2012. Thesis: Geophysical Exploration of Basal Processes and Grounding Line Dynamics Graduate Advisors: Sridhar Anandakrishnan and Richard Alley B.A. Physics, Mathematics, and Norwegian, summa cum laude, St. Olaf College, 2005.

Professional Experience 2015- Assistant Professor Department of Earth and Space Sciences, University of Washington

• Responsible for collection, analysis, and presentation/publication of GPS, ice-penetrating , seismic, hydrographic, and satellite data. • Responsible for ice-sheet/ocean modeling with incorporation of field data. • Instructor for undergraduate and graduate courses in and . • Advisor for undergraduate (summer and academic year) and graduate students in earth and space sciences.

2013-2015 Postdoctoral Research Associate Courant Institute of Mathematical Sciences, New York University Post-doctoral advisor: David Holland

• Responsible for collection, analysis, and presentation/publication of GPS, ice-penetrating radar, seismic, hydrographic, and satellite data. • Responsible for ice-sheet/ocean modeling with incorporation of field data. 2012-2013 Visiting Assistant Professor of Physics and Environmental Studies St. Olaf College • Conducted fieldwork in Antarctica, Greenland, and Arctic Norway using a variety of techniques including: GPS, ice-penetrating radar, active-source seismology, passive seismology, and glacier mass balance measurements. • Responsible for data analysis and presentation/publication of collected field data. • Instructor for Introduction to Environmental Studies and Introductory Physics Labs. • Supervision of research for undergraduates (summer and academic year) and independent studies in geophysics.

CV: Christianson 1 2011-2012 Instructor of Physics and Environmental Studies, St. Olaf College • Same as above 2006-2011 University Graduate Fellow (2006-2011) National Science Foundation Graduate Research Fellow (2007-2010) Department of Geosciences, the Pennsylvania State University • Conducted fieldwork in Antarctica, Greenland, and Arctic Norway using a variety of techniques including: GPS, ice-penetrating radar, active-source seismology, passive seismology, and glacier mass balance measurements. • Several multiple-month stays in Norway (Oslo and Meløy kommune) to conduct fieldwork on Svartisen , Arctic Norway, and to collaborate with the Norwegian Water Resources and Energy Directorate and Statkraft. • Responsible for data analysis and presentation/publication of collected field data. • Teaching assistant for Geology of Climate Change. • Tutored undergraduate summer researchers.

2005-2006 Fulbright Graduate Student Grantee, Norwegian Polar Institute and the University Centre in Svalbard, Norway

• Conducted fieldwork in the vicinity of Ny-Ålesund, Svalbard, Norway. • Responsible for data analysis and presentation of collected field data. • Outreach activities (online) with the US Embassy in Norway.

Awards and Honors NSF Graduate Research Fellowship Nordic Research Opportunity, 2010 Krynine Scholarship, the Pennsylvania State University, 2010 Norwegian Thanksgiving Fund Scholarship, Norge–Amerika Foreningen, 2008-2009 Crown Princess Märtha Fund Scholarship, American–Scandinavian Foundation, 2008-2009 Conoco Phillips Fieldwork Fellowship, the Pennsylvania State University, 2008 National Science Foundation Graduate Research Fellowship, 2007-2010 Richard R. Parizek Fellowship, the Pennsylvania State University, 2007 Anne C. Wilson Research Award, the Pennsylvania State University, 2006 University Graduate Fellowship, the Pennsylvania State University, 2006 Fulbright Fellowship to Norway, 2005-2006 Sigma Pi Sigma, inducted 2005 Phi Beta Kappa, inducted 2004 Buntrocks Regents’ Scholarship, St. Olaf College, 2001-2005

Publications (23 peer-reviewed; Citations: 249 (Google Scholar), 167 (Web of Science); h-index: 9 (Google Scholar), 7 (Web of Science); i10-index: 9 (Google Scholar); *student coauthor)

23. Marsh, O., H. A. Fricker, M. R. Siegfried*, K. Christianson, K. W. Nicholls, H. F. J. Corr, and G. Catania, 2016. High basal melt rates initiate a channel at the grounding line of the Ross , Antarctica, Geophysical Research Letters, 42, 250–255, doi: 10.1002/2015GL066612.

22. Alley, R. B., S. Anandakrishnan, K. Christianson, H. J. Horgan, A. Muto, B. R. Parizek, D. Pollard, and R. T. Walker, 2015. Oceanic forcing of ice-sheet retreat: West Antarctica and more,

CV: Christianson 2 Annual Reviews of Earth and Planetary Sciences, 43, 207–231, doi: 10.1146/annurev-earth- 060614-105344.

21. Christianson, K., J. Kohler, R. B. Alley, C. Nuth, and W. J. J. van Pelt, 2015. Dynamic perennial firn aquifer on an Arctic glacier, Geophysical Research Letters, 42, 1618–1625, doi: 10.1002/2014GL062806.

20. Voytenko, D.*, A. Stern, D. M. Holland, T. H. Dixon, K. Christianson, and R. T. Walker, 2015. Observing tidally-driven ice speed variation at Helheim Glacier, Greenland using Terrestrial Radar Interferometry, Journal of Glaciology, 61(226), 301–308, doi: 10.3189/2015JoG14J173.

19. Christianson, K., L. E. Peters, R. B. Alley, R. W. Jacobel, S. Anandakrishnan, K. L. Riverman*, A. Muto, and B. A. Keisling*, 2014. Dilatant till facilitates ice-stream flow in northeast Greenland, Earth and Letters, 401, 57–69, doi: 10.1016/j.epsl.2014.05.060.

18. Christner, B. C., J. C. Priscu, A. M. Achberger*, C. Barbante, S. P. Carter, K. Christianson, J. A. Mikucki, A. B. Michaud*, A. Mitchell, M. L. Skidmore, T. J. Vick-Majors*, and the WISSARD Science Team, 2014. Whillans: A microbial system beneath the West Antarctic , Nature, 512, 310–313 , doi: 10.1038/nature13667.

17. Fudge, T. J., H. Conway, G. Catania, D. D. Blankenship, K. Christianson, I. Joughin, B. Smith, S. Kempf, D. Young, and S. Anandakrishnan, 2014. Identifying flowlines and limitations of flux analyses in the interior of Thwaites Glacier, Antarctica, Annals of Glaciology, 55(67), 107–114, doi: 10.3189/2014AoG67A033.

16. Holshuh, N.*, K. Christianson, and S. Anandakrishnan, 2014. Power loss in dipping internal layers imaged through radio-echo sounding, Annals of Glaciology, 55(67), 49–56, doi: 10.3189/2014AoG67A005.

15. Jacobel, R. W., K. Christianson, A. C. Wood*, K. J. DallaSanta*, and R. M. Gobel*, 2014. Morphology of basal crevasses at the grounding zone of Whillans Ice Stream, West Antarctica, Annals of Glaciology, 55(67), 57–63, doi: 10.3189/2014AoG67A004.

14. Keisling, B. A.*, K. Christianson, R. B. Alley, L. E. Peters. J. E. M. Christian*, S. Anandakrishnan, K. L. Riverman*, A. Muto, S. Anandakrishnan, and R. W. Jacobel, 2014. Basal conditions and ice dynamics inferred from interred from radar-derived internal stratigraphy of the Northeast Greenland Ice Stream, Annals of Glaciology, 55(67), 127–137, doi: 10.3189/2014AoG67A090.

13. Vallelonga, P., K. Christianson, R. B. Alley, S. Anandakrishnan, J. E. M. Christian*, D. Dahl Jensen, V. Gkinis, C. Holme, R. W. Jacobel, N. Karlsson, B. A. Keisling*, S. Kipfstuhl, H. A. Kjær, M. E. L. Kristensen, A. Muto, L. E. Peters, T. Popp, K. L. Riverman*, A. M Svensson, C. Tibuleac, B. M. Vinther, Y. Weng, and M. Winstrup, 2014. Initial results from geophysical surveys and shallow coring of the Northeast Greenland Ice Stream (NEGIS), The Cryosphere, 8, 1275–1287, doi: 10.5194/tc-8-1275-2014.

12. Christianson, K., B. R. Parizek, R. B. Alley, H. J. Horgan, R. W. Jacobel, S. Anandakrishnan, B. A. Keisling*, B. D. Craig*, and A. Muto, 2013. Ice sheet grounding zone stabilization due to till compaction, Geophysical Research Letters, 40, 5406–5411, doi: 10.1002/2013GL057447.

CV: Christianson 3

11. Horgan, H. J., R. B. Alley, K. Christianson, R. W. Jacobel, S. Anandakrishnan, A. Muto, L. H. Beem*, and M. R. Siegfried*, 2013. Estuaries beneath ice sheets, Geology, 41(11), 1159–1162, doi: 10.1130/G34654.1.

10. Horgan, H. J., K. Christianson, R. W. Jacobel, S. Anandakrishnan, and R. B. Alley, 2013. Sediment deposition at the modern grounding zone of Whillans Ice Stream, West Antarctica, Geophysical Research Letters, 40, 3934–3939, doi: 10.1002/grl.50712.

9. Moore, P. L., J. P. Winberry, N. R. Iverson, K. A. Christianson, S. Anandakrishnan, M. Jackson, M. E. Mathison, and D. Cohen, 2013. Glacier slip and seismicity induced by surface melt, Geology, 41(12), 1247–1250, doi: 10.1130/G34760.1.

8. Muto, A., K. Christianson, H. J. Horgan, S. Anandakrishnan, and R. B. Alley, 2013. Bathymetry and geological structures beneath the at the mouth of Whillans Ice Stream, West Antarctica, modeled from ground-based gravity measurements, Journal of Geophysical Research, 118, 4535–4546, doi: 10.1002/jgrf.50315.

7. Parizek, B. R., K. Christianson, S. Anandakrishnan, R. B. Alley, R. T. Walker, R. A. Edwards*, D. S. Wolfe*, G. T. Bertini*, S. K. Reinhart*, R. A. Bindschadler, and S. M. J. Nowicki, 2013. Dynamic (in)stability of Thwaites Glacier, West Antarctica, Journal of Geophysical Research, 118, 638–655, doi: 10.1002/jgrf.20044.

6. Walker, R. T., B. R. Parizek, R. B. Alley, S. Anandakrishnan, K. L. Riverman*, and K. Christianson, 2013. Ice-shelf tidal flexure and subglacial pressure variations, Earth and Planetary Science Letters, 361, 422–428, doi: 10.1016/j.epsl.2012.11.008.

5. Zoet, L. K.*, R. B. Alley, S. Anandakrishnan, and K. Christianson*, 2013. Accelerated subglacial erosion in response to basal seismicity, Geology, 41(2), 159–162, doi: 10.1130/G33624.1.

4. Christianson, K.*, R. W. Jacobel, H. J. Horgan, S. Anandakrishnan, and R. B. Alley, 2012. Subglacial Lake Whillans — Ice-penetrating radar and GPS observations of a shallow active reservoir beneath a West Antarctic ice stream, Earth and Planetary Science Letters, 331–332, 237–245, doi: 10.1016/j.epsl.2012.03.013.

3. Horgan, H. J., S. Anandakrishnan, R. W. Jacobel, K. Christianson*, R.B. Alley, D. S. Heeszel, S. Picotti, and J. I. Walter*, 2012. Subglacial Lake Whillans — Seismic observations of a shallow active reservoir beneath a West Antarctic ice stream, Earth and Planetary Science Letters, 331– 332, 201–209, doi: 10.1016/j.epsl.2012.02.023.

2. Walker, R. T., K. Christianson*, B. R. Parizek, S. Anandakrishnan, and R. B. Alley, 2012. A viscoelastic flowline model applied to tidal forcing of Bindschadler Ice Stream, West Antarctica, Earth and Planetary Science Letters, 319–320, 128–132, doi: 10.1016/j.epsl.2011.12.019.

1. Winberry, J. P., S. Anandakrishnan, D. A. Wiens, R. B. Alley, and K. Christianson*, 2011. Dynamics of stick-slip motion, Whillans Ice Stream, Antarctica, Earth and Planetary Science Letters, 305(3–4), 283–289, doi: 10.1016/j.epsl.2011.02.052.

CV: Christianson 4 Oral Presentations (55 total; 25 1st author; 4 invited; *student coauthor)

55. Christianson, K., M. Bushuk, D. Holland, P. Dutrieux, I. Joughin, B. Parizek, R. Alley, S. Anandakrishnan, K. Heywood, A. Jenkins, K. Nicholls, B. Webber, A. Muto, T. Stanton, External forcing modulates Pine Island Glacier Flow, AGU 2015 Fall Meeting, C11D-05, San Francisco, CA, December 2015.

54. Parizek, B., R. Alley, S. Anandakrishnan, P. Applegate, K. Christianson, T. Dixon, D. Holland, N. Holschuh*, K. Keller, D. Lampkin, A. Muto, R. Nicholas, N. Stevens*, D. Voytenko, and R. Walker, Greenland Flow Dynamics: (De)coding Process Understanding, C42A-01, AGU 2015 Fall Meeting, C42A-01, San Francisco, CA, December 2015, invited.

53. S. Tulaczyk, S. Schwartz, A. Fisher, R. Powell, H. Fricker, S. Anandakrishnan, H. Horgan, R. Scherer, J. I Walter, M. Siegfried, J. Mickucki, K. Christianson, L. Beem, K. Mankoff, S. Carter, T. Hodson, O. Marsh,, C. Barcheck*, C. Barnercky*, S. Neuhaus*, and R. Jacobel, Grounding Zones, Subglacial Lakes, and Dynamics of an Antarctic Ice Stream: The WISSARD Glaciological Experiment, AGU 2015 Fall Meeting, C13D-08, San Francisco, CA, December 2015.

52. Christianson, K., M. Bushuk, B. Parizek, D. Holland, S. Anandakrishnan, R. Alley, P. Dutrieux, K. Heywood, A. Jenkins, Ian Joughin, A. Muto, K. Nicholls, T. Stanton, and B. Webber, External forcing modulates Pine Island Glacier flow, 2015 West Antarctic Ice Sheet Workshop, Loveland, CO, September 2015, invited.

51. Muto, A., L. E. Peters, S. Anandakrishnan, K. Christianson, R. B. Alley, and B. R. Parizek, Upper-crustal structures and their influence on ice dynamics in the Amundsen Sea Embayment, 2015 West Antarctic Ice Sheet Workshop, Loveland, CO, September 2015.

50. Christianson, K., D. Holland, P. Dutrieux, I. Joughin, M. Bushuk, B. Parizek, S. Anandakrishnan, R. Alley, A. Jenkins, K. Heywood, T. Stanton, and A. Muto, External forcing modulates Pine Island Glacier flow, International Glaciological Society Symposium on Contemporary Ice Sheet Dynamics, 73A1913, Cambridge, UK, August 2015, presented by P. Dutrieux.

49. Christianson, K., D. Holland, P. Dutrieux, I. Joughin, M. Bushuk, B. Parizek, S. Anandakrishnan, R. Alley, A. Jenkins, K. Heywood, T. Stanton, and A. Muto, External forcing modulates Pine Island Glacier flow, International Glaciological Society Symposium on Contemporary Ice Sheet Dynamics, 73A1913, Cambridge, UK, August 2015, presented by P. Dutrieux.

48. Christianson, K., D. Holland, P. Dutrieux, I. Joughin, M. Bushuk*, A. Muto, B. Parizek, R. Alley, T. Stanton, and S. Anandakrishnan, Pine Island Glacier response to external forcing, New England Glaciology Meeting, Woods Hole, MA, April 2015.

47. Horgan, H., S. Anandakrishnan, R. Alley, and K. Christianson, Amplitude analysis of active source seismic data from the grounding zone of Whillans Ice Stream, EGU 2015 General Assembly, EGU2015-7049, Vienna, Austria, April 2015.

CV: Christianson 5 46. Christianson, K., R Jacobel, H. Horgan, S. Anandakrishnan, D. Holland, and R. Alley, Interpretation or radar basal reflectivity in ice-sheet grounding zones, AGU 2014 Fall Meeting, C52A-06, San Francisco, CA, December 2014.

45. Jacobel, R. W., K. Christianson, A. Wood*, and B. Craig*, Using internal layer deformation and satellite-derived velocities to explore the strain history of Whillans Ice Stream, West Antarctica, AGU 2014 Fall Meeting, C51C-07, San Francisco, CA, December 2014.

44. Christianson, K., R. W. Jacobel, H. J. Horgan, S. Anandakrishnan, D. M. Holland, and R. B. Alley, Inference of grounding-zone water properties from radar basal reflectivity, West Antarctic Ice Sheet Workshop, Julian, CA, September 2014, invited.

43. Christianson, K., B. R. Parizek, H. J. Horgan, D. M. Holland, R. B. Alley, S. Anandakrishnan, R. W. Jacobel, and D. Pollard, The role of grounding-zone process in sea-level rise, IGS Symposium on the Contribution of and Ice Sheets to Sea-Level Rise, Chamonix, France, May 2014.

42. Christianson, K., H. Horgan, B. Parizek, R. Alley, R. Jacobel, S. Anandakrishnan, and D. Pollard, Ice-sheet (de)stabilization via grounding-zone processes, EGU 2014 General Assembly, EGU2014-874, Vienna, Austria, April 2014.

41. Christianson, K., Is there a need for an ice-sheet/ocean observation system?, Environmental Science and Engineering Seminar, California Institute of Technology, Pasadena, CA, April 2014, invited.

40. Christianson, K. A., H. Horgan, B. R. Parizek, R. B. Alley, S. Anandakrishnan, R. W. Jacobel, B. A. Keisling*, K. L. Dalla Santa*, B. Craig*, and R. T. Walker, Ice-sheet (de)stabilization via grounding-zone processes, AGU 2013 Fall Meeting, GC34A-07, San Francisco, CA, December 2013, invited.

39. Riverman, K. L., S. Anandakrishnan, R. B. Alley, L. E. Peters, K. A. Christianson, and A. Muto, Firn thickness variations across the Northeast Greenland Ice Stream margins indicating nonlinear densification rates, AGU 2013 Fall Meeting, C24B-06, San Francisco, CA, December 2013.

38. Christianson, K., H. J. Horgan, B. R. Parizek, R. B. Alley, R. W. Jacobel, and S. Anandakrishnan, Subglacial water and sediment transport across the grounding zone of Whillans Ice Stream, West Antarctica, West Antarctic Ice Sheet Workshop, Sterling, VA, October 2013.

37. Jacobel, R. W., K. Christianson, and A. C. Wood*, What Basal Crevasses Reveal about the Stress State at the Ice-Ocean Interface of Whillans Ice Stream, West Antarctic Ice Sheet Workshop, Sterling, VA, October 2013.

36. Muto, A., K. Christianson, H. J. Horgan, S. Anandakrishnan, and R. B. Alley, Bathymetry and geological structures beneath the Ross Ice Shelf at the mouth of Whillans Ice Stream, West Antarctica, modeled from ground-based gravity measurements, West Antarctic Ice Sheet Workshop, Sterling, VA, October 2013.

35. Christian, J. E. M.*, A. C. Wood*, K. Christianson, L. Peters, K. L. Riverman, A. Muto, S. Anandakrishnan, R. B. Alley, and R. W. Jacobel, Basal conditions of the Northeast Greenland Ice Stream mapped from joint radar/seismic surveys, IGS Radioglaciology Symposium, Lawrence, KS, September 2013.

CV: Christianson 6

34. Christianson, K., H.J. Horgan, R. B. Alley, R. W. Jacobel, and S. Anandakrishnan, Radar/seismic imaging of a subglacial estuary at the grounding zone of Whillans Ice Stream, Lawrence, KS, September 2013, presented by S. Anandakrishnan substituting for Christianson who was attending a Keck Institute for Space Studies workshop on Thwaites and Pine Island Glaciers.

33. Holshuh, N., S. Anandakrishnan, and K. Christianson, The implications of reflector geometry on radar data acquisition, IGS Radioglaciology Symposium, Lawrence, KS, September 2013.

32. Jacobel, R. W., K. A. Christianson, A. C. Wood*, K. J. DallaSanta*, and R. M. Gobel*, Morphology of basal crevasses at the grounding zone of Whillans Ice Stream, West Antarctica, IGS Radioglaciology Symposium, Lawrence, KS, September 2013.

31. Riverman, K. L., S. Anandakrishnan, R. B. Alley, L. E. Peters, K. Christianson, and A. Muto, Northeast Greenland Ice Stream basal conditions from seismology and ice-penetrating radar, IGS Radioglaciology Symposium, Lawrence, KS, September 2013.

30. Christianson, K. Using active-source seismology to constrain radar derived basal conditions, Radio-echo sounding layer tracing workshop, Copenhagen, Denmark, May 2013.

29. Christianson, K., R. B. Alley, L. E. Peters, S. Anandakrishnan, R. W. Jacobel, K. L. Riverman, and A. Muto, Self-stabilizing ice-stream flow in northeast Greenland, EGU 2013 General Assembly, EGU2013-571, Vienna, Austria, April 2013.

28. Keisling, B. A.*, K. Christianson, R. W. Jacobel, S. Anandakrishnan, L. E. Peters, and R. B. Alley, Examining the past dynamics of the Northeast Greenland Ice Stream through radar internal stratigraphy, Arctic Workshop, Amherst, MA, March 2013.

27. Parizek, B. R., K. Christianson, R. B. Alley, H. J. Horgan, R. W. Jacobel, S. Anandakrishnan, B. A. Keisling*, and B. D. Craig, Ice sheet grounding zone stabilization due to till compaction, Annual Midwest Glaciology Meeting, University Park, PA, March 2013.

26. Christianson, K., R. W. Jacobel, L. E. Peters, S. Anandakrishnan, R. B. Alley, K. L. Riverman, and A. Muto, Ground-Based Geophysical Surveys of the Northeast Greenland Ice Stream, AGU 2012 Fall Meeting, C43G-06, San Francisco, CA, December 2012.

25. Jacobel, R. W., K. A. Christianson, H. Horgan, S. Anandakrishnan, R. B. Alley, B. Keisling*, B. Craig*, K. Dalla-Santa*, R. Gobel*, and L. Snyder*, Geologic controls on the motion of Whillans Ice Stream from ground-based geophysical studies during the WISSARD project, AGU 2012 Fall Meeting, C43G-01, San Francisco, CA, December 2012, invited.

24. Moore, P. L., J. Winberry, K. Christianson, N. R. Iverson, S. Anandakrishnan, M. Jackson, and D. O. Cohen, Seismicity and Subglacial Processes During Early Melt Season, Engabreen, Norway, AGU 2012 Fall Meeting, C11A-07, San Francisco, CA, December 2012.

23. Parizek, B. R., R. B. Alley, S. Anandakrishnan, K. A. Christianson, T. K. Dupont, R. A. Edwards*, R. T. Walker, and D. S. Wolfe*, Predicting glacier evolution: Why additional data is critical, AGU 2012 Fall Meeting, C22A-03, San Francisco, CA, December 2012.

CV: Christianson 7 22. Christianson, K., R. W. Jacobel, H. J. Horgan, S. Anandakrishnan, R. B. Alley, B. Petersen, B. Keisling*, L. Snyder*, R. Gobel*, B. Craig*, and K. Dalla-Santa*, Grounding Zone Heterogeneity on Whillans Ice Stream, West Antarctica, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2012.

21. Alley, R. B., S. Anandakrishnan, B. R. Parizek, R. T. Walker, K. Christianson, K. L. Wilson, and D. Pollard, Grounding-line processes and stability of ice-sheet margins, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012, keynote presentation.

20. Christianson, K., R. Jacobel, H. Horgan, S. Anandakrishnan, R. Alley, A. Muto, and B. Petersen, Grounding Zone Heterogeneity on Whillans Ice Stream, West Antarctica, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

19. Horgan, H., S. Anandakrishnan, K. Christianson, R. Jacobel, and R. B. Alley, Grounding Zone Structure and Bathymetry from Active Source Seismic Surveying, Whillans Ice Stream, West Antarctica, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

18. Jacobel, R., K. Christianson, H. Horgan, S. Anandakrishnan, R. Alley, A. Muto, B. Petersen, R. Gobel*, B. Keisling*, and L. Snyder*, Geophysical characteristics of Subglacial Lake Whillans and the ice stream grounding zone, West Antarctica, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

17. Horgan, H., S. Anandakrishnan, K. Christianson, R. Jacobel, and R. B. Alley, Grounding Zone Structure and Bathymetry from Active Source Seismic Surveying, Whillans Ice Stream, West Antarctica, IGS Symposium on Glaciers and Ice Sheets in a Warming Climate, Fairbanks, AK, June 2012.

16. Jacobel, R., K. Christianson, H. Horgan, S. Anandakrishnan, R. Alley, A. Muto, B. Petersen, R. Gobel*, B. Keisling*, and L. Snyder*, A Geophysical Characterization of Whillans Ice Stream, IGS Symposium on Glaciers and Ice Sheets in a Warming Climate, Fairbanks, AK, June 2012.

15. Christianson, K., B. R. Parizek, S. Anandakrishnan, R. B. Alley, R. T. Walker, R. A. Edwards*, D. S. Wolfe*, and G. T. Bertini*, Stability of the Grounding Zone of Thwaites Glacier, West Antarctica, AGU 2011 Fall Meeting, C31C-08, San Francisco, CA, December 2011, presented by R. Walker substituting for Christianson who was in Antarctica for fieldwork.

14. Jacobel, R. W., K. Christianson, H. Horgan, S. Anandakrishnan, R. Gobel*, B. Keisling*, and L. Snyder*, Geophysical characteristics of an active subglacial lake revealed by radar and seismic experiments, Whillans Ice Stream, Antarctica, AGU 2011 Fall Meeting, C14B-02, San Francisco, CA, December 2011, invited.

13. Moore, P. L., K. Christianson, N. R. Iverson, J. Winberry, D. O. Cohen, S. Anandakrishnan, and M. Jackson, Surface and Subglacial Measurements of a “Spring Event” at Engabreen, Norway, AGU 2011 Fall Meeting, C41G-06, San Francisco, CA, December 2011.

12. Walker, R. T., K. Christianson, B. R. Parizek, S. Anandakrishnan, and R. B. Alley, A viscoelastic flowline model applied to tidal forcing of Bindschadler Ice Stream, West Antarctica, AGU 2011 Fall Meeting, C32A-02, San Francisco, CA, December 2011.

CV: Christianson 8 11. Christianson, K., R. Jacobel, H. Horgan, S. Anandakrishnan and R. B. Alley, Dynamics of Subglacial Lake Whillans from WISSARD Radar, Seismic, and GPS Surveys, and Satellite Laser Altimetry, West Antarctic Ice Sheet Workshop, Lakeland, CO, September 2011.

10. Jacobel, R., K. Christianson, R. Gobel*, B. Keisling*, L. Snyder*, and S. Anandakrishnan, Radar Results from the Geophysics Site Characterization of Subglacial Lake Whillans, West Antarctica, West Antarctic Ice Sheet Workshop, Lakeland, CO, September 2011.

9. Walker, R., K. Christianson, B. Parizek, S. Anandakrishnan, and R. Alley, A viscoelastic flowline model applied to tidal forcing of Bindschadler Ice Stream, Antarctica, West Antarctic Ice Sheet Workshop, Lakeland, CO, September 2011.

8. Christianson, K., H. Horgan, S. Anandakrishnan and R. Alley, Thinning rates of Thwaites Glacier, West Antarctica, from GPS and GLAS ICESat laser altimetry observations, IGS Symposium on Interaction of Ice Sheets and Glaciers with the Ocean, La Jolla, CA, June 2011.

7. Anandakrishnan, S., K. Christianson, L. Zoet and J. Winberry, Quasi-Periodic Stick-Slip of Glaciers and Ice Streams, AGU 2010 Fall Meeting, C52A-02, San Francisco, CA, December 2010, invited.

6. Christianson, K., H. Horgan, and S. Anandakrishnan, Changes in the surface velocity of Thwaites Glacier from differential GPS observations, West Antarctic Ice Sheet Workshop, Raystown, PA, September 2010.

5. Justin, R., D. Voigt, K. Christianson, P. Burkett, B. Long, and S. Anandakrishnan, Recent multi- proxy observations of Greenlandic supraglacial lake drainages: field tests of equipment, methods, and ideas, West Antarctic Ice Sheet Workshop, Raystown, PA, September 2010.

4. Christianson, K., S. Anandakrishnan, R. Alley, M. Jackson, and H. Elvehøy, Basal Seismicity Time Series Event Discrimination and Source Time Function Analysis at Engabreen Glacier, Norway, International Polar Year Oslo Science Conference, Oslo, Norway, June 2010.

3. Christianson, K., S. Anandakrishnan, R. Alley, M. Jackson, and H. Elvehøy, Basal Seismicity Time Series Event Discrimination and Source Time Function Analysis at Engabreen Glacier, Norway, Svartisen Subglacial Laboratory Workshop, Svartisen, Norway, March 2009.

2. Christianson, K., H. Horgan, and S. Anandakrishnan, Changes in the surface velocity of Thwaites Glacier from differential GPS observations, Scientific Committee on Antarctic Research Open Science Conference, Buenos Aires, Argentina, August 2008.

1. Welch, B. C., R. W. Jacobel, K. Christianson*, and K. Cofell-Dwyer*, Interactions Between Large Bedrock Features and Ice Sheet Dynamics Interpreted from Deep-Penetrating Radar along US-ITASE Traverse Routes, AGU 2003 Fall Meeting, C21D-02, San Francisco, CA, December 2003, invited.

Poster Presentations (36 total; 6 1st author; *student coauthor)

36. Kohler, J., K. Christianson, and W. van Pelt, A dynamic perennial firn aquifer, AGU 2015 Fall Meeting, C51B-0700, San Francisco, CA, December 2015.

CV: Christianson 9 35. Muto, A., L. Peters, K. Christianson, R. Alley, and B. Parizek, Upper-Crustal Structures Beneath Thwaites Glacier, West Antractica and their Influence on Ice Dynamics, C11A-0736, San Francisco, CA, December 2015.

34. Jacobel, R., E. Dawson, K. Christianson, Imaging Basal Crevasses at the Grounding Zone of Whillans Ice Stream, West Antarctica, AGU 2015 Fall Meeting, C11B-0758, December 2015.

33. Riverman, K., R. Alley, S. Anandakrishnan, K. Christianson, L. Meters and A. Muto, Flow Dynamics and Stability of the NE Greenland Ice Stream from Active Seismics and Radar, AGU 2015 Fall Meeting, NS21A-1915, San Francisco, CA, December 2015, invited.

32. MacGregor, J. A., K. Christianson, and G. Ng, Toward radar thermometry of ice sheets, 2015 West Antarctic Ice Sheet Workshop, Loveland, CO, September 2015.

31. Riverman, K., S. Anandakrishnan, R. Alley, L. Peters, K. Christianson, and A. Muto, Firn Corrections for Geophysical Studies: New Methods, Parameters, and Prospects, 2015 West Antarctic Ice Sheet Workshop, Loveland, CO, September 2015.

30. R. Jacobel, K. Christianson, A. Wood*, Imaging basal crevasses at the grounding line of Whillans Ice Stream, West Antarctica, International Glaciological Society Symposium on Contemporary Ice Sheet Dynamics, 73A1806, Cambridge, UK, August, 2015.

29. Parizek, B. R., K. Christianson, R. Alley, S. Anandakrishnan, T. Dupont, D. Holland, D. Pollard, and R. Walker, The impact of empirical calving laws on Thwaites Glacier dynamics, AGU 2014 Fall Meeting, C23A-0396, San Francisco, CA, December 2014.

28. Jacobel, R., K. Christianson, A. Wood*, K. DallaSanta*, and R. Gobel*, Basal Crevasses Reveal Dynamic Ice-Ocean Interface in an Embayment of the Whillans Ice Stream Grounding Line, EGU 2014 General Assembly, EGU2014-95, Vienna, Austria, April 2014.

27. Christianson, K. A., B. R. Parizek, R. B. Alley, H. Horgan, L. E. Peters, B. A. Keisling*, R. W. Jacobel, S. Anandakrishnan, K. L. Dalla Santa*, and J. E. Christian*, In-site creation of internal layer folds in radio-echo sounding data of ice sheets from variable basal conditions, AGU 2013 Fall Meeting, C33B-0722, San Francisco, CA, December 2013.

26. Jacobel, R. W., K. A. Christianson, A. C. Wood*, K. L. Dalla Santa*, and R. M. Gobel*, Basal Crevasses at the Ice-Ocean Interface of Whillans Ice Stream, West Antarctica, AGU 2013 Fall Meeting, GC31A-1007, San Francisco, CA, December 2013.

25. Keisling, B. A.*, K. A. Christianson, R. B. Alley, L. E. Peters, J. E. Christian*, S. Anandakrishnan, K. L. Riverman*, A. Muto and R. W. Jacobel, Basal conditions and ice dynamics inferred from radar-derived internal stratigraphy of the Northeast Greenland Ice Stream, AGU 2013 Fall Meeting, C33B-0715, San Francisco, CA, December 2013.

24. Winberry, J. P., K. A. Christianson, P. L. Moore, N. R. Iverson, S. Anandakrishnan, and M. Jackson, Imaging basal conditions using naturally occurring seismic emissions, AGU 2013 Fall Meeting, C31B-0523, San Francisco, CA, December 2013.

23. Craig, B. D.*, K. J. DallaSanta*, K. A. Christianson, and R. W. Jacobel, Brightness and folds across an Antarctica grounding line, IGS Radioglaciology Symposium, Lawrence, KS, September 2013.

CV: Christianson 10 22. Christianson, K., H. J. Horgan, R. W. Jacobel, S. Anandakrishnan, R. B. Alley, A. Muto, B. D. Craig*, K. Dalla-Santa*, R. Gobel*, B. A. Keisling*, and L. Synder*, Subglacial Water and Sediment Transport across the Grounding Zone of Whillans Ice Stream, West Antarctica, Ice Rises Workshop, Tromsø, Norway, August 2013.

21. Christianson, K., H. J. Horgan, R. W. Jacobel, S. Anandakrishnan, R. B. Alley, A. Muto, B. D. Craig*, K. Dalla-Santa*, R. Gobel*, B. A. Keisling*, and L. Synder*, Subglacial Water and Sediment Transport across the Grounding Zone of Whillans Ice Stream, West Antarctica, EGU 2013 General Assembly, EGU2013-11276, Vienna, Austria, April 2013.

20. Jacobel, R. W., K. A. Christianson, H. Horgan, B. R. Parizek, S. Anandakrishnan, R. B. Alley, R. T. Walker, B. Keisling*, L. Snyder*, R. Gobel*, B. Craig*, and K. Dalla-Santa*, Grounding Zone Heterogeneity in West Antarctica, AGU 2012 Fall Meeting, C43D-0638, San Francisco, CA, December 2012.

19. Muto, A., K. A. Christianson, H. Horgan, S. Anandakrishnan, and R. B. Alley, Bathymetry and geological structures beneath the Ross Ice Shelf at the mouth of Whillans Ice Stream, West Antarctica, modeled from ground-based gravity measurements, AGU 2012 Fall Meeting, C31A- 0575, San Francisco, CA, December 2012.

18. Riverman, K. L., K. A. Christianson, S. Anandakrishnan, L. E. Peters, A. Muto, and R. B. Alley, GPS Measurements of Ice Velocity and Strain on the Northeast Greenland Ice Stream, AGU 2012 Fall Meeting, C31A-0582, San Francisco, CA, December 2012.

17. Siegfried, M. R., H. A. Fricker, L. Beem, K. Christianson, H. Horgan, and S. M. Tulaczyk, A comparison of grounding zone features and flexure dynamics in two geometries over a 12-hour tidal range, AGU 2012 Fall Meeting, C43D-0660, San Francisco, CA, December 2012.

16. Walker, R. T., B. R. Parizek, R. B. Alley, S. Anandakrishnan, K. L. Riverman, and K. A. Christianson, Ice-shelf tidal flexure and subglacial pressure variations, AGU 2012 Fall Meeting, C43D-0651, San Francisco, CA, December 2012.

15. Muto, A., K. Christianson, H. J. Horgan, S. Anandakrishnan, and R. B. Alley, Gravity survey on the Ross Ice Shelf at the mouth of Whillans Ice Stream, West Antarctica, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2012.

14. Siegfried, M. R., H. A. Fricker, L. Beem, K. Christianson, H. J. Horgan, and S.M. Tulaczyk, A comparison of grounding zone features and flexure dynamics in two geometries over a 12-hour tidal range, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2012.

13. Walker, R. T., B. R. Parizek, R. B. Alley, S. Anandakrishnan, K. L. Wilson, and K. Christianson, Ice-shelf tidal flexure and subglacial pressure variations, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2012.

12. Christianson, K., B. Parizek, H. Horgan, S. Anandakrishnan, R. Alley, R. Walker, R. Edwards*, D. Wolfe*, G. Bertini*, and S. Reinhart*, The Dynamic (In)stability of Thwaites Glacier, West Antarctica, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

CV: Christianson 11 11. Keisling, B.*, K. Christianson, H. Horgan, R. Jacobel S. Anandakrishnan, and B. Petersen, Local Variability in Basal Reflectivity Across the Grounding Zone of Whillans Ice Stream from Ice Penetrating Radar, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

10. Siegfried, M., H. Fricker, L. Beem, K. Christianson, H. Horgan, and S. Tulaczyk, A comparison of grounding zone flexure in two geometries over a 12-hour tidal cycle, Scientific Committee on Antarctic Research Open Science Conference, Portland, OR, July 2012.

9. Siegfried, M. R., K. Christianson, H. A. Fricker, S. M. Tulaczyk, Continuing the Whillans Ice Stream subglacial lake record with GPS, AGU 2011 Fall Meeting, C11E-0711, San Francisco, CA, December 2011.

8. Jacobel, R., K. Christianson, R. Gobel*, B. Keisling*, and L. Snyder*, Geophysical Characteristics of an Active Antarctic Subglacial Lake Revealed by Ground Penetrating Radar, Geological Society of America 2011 Annual Meeting, 183-9, Minneapolis, MN, October 2011.

7. Horgan, H., K. Christianson, R. Jacobel, S. Anandakrishnan and R. Alley, A Shallow Active Reservoir Beneath a West Antarctic Ice Stream, West Antarctic Ice Sheet Workshop, Lakeland, CO, September 2011.

6. Siegfreid, M.R., K. Christianson, H. A. Fricker, and S. M. Tulaczyk, Continuing the Whillans Ice Stream subglacial lake record with GPS, West Antarctic Ice Sheet Workshop, Lakeland, CO, September 2011.

5. Moore, P. L., K. Christianson, N. R. Iverson, J. Winberry, D. Cohen, S. Anandakrishnan, M. Mathison, and M. Jackson, Glacier Seismicity and Basal Sliding: Field Experiments at Engabreen, Norway, AGU 2010 Fall Meeting, C43A-0527, San Francisco, CA, December 2010.

4. Justin, R., P.G. Burkett, D. Voigt, K. Christianson, S. Anandakrishnan, Characterizing Greenland supraglacial lake drainage events using GPS and seismic data, AGU 2009 Fall Meeting, C21B- 0437, San Francisco, CA, December 2009.

3. Christianson, K., H. Horgan, and S. Anandakrishnan, Changes in the surface velocity of Thwaites Glacier from differential GPS observations, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2009.

2. P. Burkett, B. Long, K. Christianson, R. Justin, D. Voigt, and S. Anandakrishnan, A comparison of geophysical observations of a Greenlandic supraglacial lake drainage using commercial instruments and a low-cost experimental alternative, West Antarctic Ice Sheet Workshop, Pack Forest, WA, September 2009.

1. Christianson, K., J. Kohler, O. Brandt, and C. Nuth, Absolute Water Content in the Temperature Firn of Holtedalfonna, Svalbard as Mapped by Ground-Penetrating Radar, AGU 2006 Fall Meeting, C41A-0304, San Francisco, CA, December 2006.

Grants Current • Unraveling the history of the Greenland Ice Sheet from its internal radiostratigraphy, NSF Arctic Natural Sciences, Co-PI, 9/1/2015–8/31/2018, $284,093

CV: Christianson 12 Teaching Experience • Physics of Ice (ESS 531/ATM S 510), Department of Earth and Space Sciences and Atmospheric Sciences, University of Washington, winter quarter 2016 (30 hours formal instruction, graduate students).

• Principles of Glaciology and The Cyrosphere (ESS431/505), Department of Earth and Space Sciences, University of Washington, fall quarter 2015. (45 hours formal instruction of upper-level (3rd and 4th year) undergraduate students and graduate students). • Introduction to Environmental Studies, St. Olaf College, spring 2012, 2013. (45 hours formal instruction of undergraduate students). • Introductory Physics Laboratory, St. Olaf College, spring 2012, 2013. (45 hours formal instruction/supervision of undergraduate students) • Independent studies in geophysics at St. Olaf College, spring 2012, 2013 (supervision of 5 full credit (45 hours) independent study courses as well supervision of an undergraduate student 2- week fieldwork experience in Norway). • National Science Teachers Association Webinar on WISSARD project, spring 2012. • Summer undergraduate research advisor, the Pennsylvania State University, summer 2009 (major responsibility for supervision of two students). • Teaching assistant for Geology of Climate Change, Department of Geosciences, the Pennsylvania State University, spring 2009. • Undergraduate research advisees: B. Craig (St. Olaf), J. E. Christian (St. Olaf), K. Dalla Santa (St. Olaf), R. Gobel (St. Olaf), B. Keisling (St. Olaf), A. Platonov (NYU AD), L. Snyder (St. Olaf), and A. Wood (St. Olaf).

Fieldwork Activities

Antarctic Fieldwork: • Whillans Ice Stream Grounding Zone, Whillans Ice Stream, active-source seismic, passive seismic, gravity, ice-penetrating radar, and GPS surveys, winter 2011-2012. • Subglacial Lake Whillans, Whillans Ice Stream, active-source seismic, passive seismic, ice-penetrating radar, and GPS surveys, winter 2010-2011. • Upper Thwaites Glacier and WAIS Divide, active-source seismic, passive seismic, ice- penetrating radar, and GPS surveys, winter 2009-2010. • Lower Thwaites Glacier and WAIS Divide, active-source seismic, ice-penetrating radar, and GPS surveys, winter 2007-2008. Norwegian Fieldwork: • Svartisen Ice Cap, Arctic Norway, passive seismic and GPS surveys, subglacial water flow experiments, spring 2008, spring 2009, spring 2010, spring 2011, fall 2011, and spring 2012. • Svalbard, mass balance, GPS, and ice-penetrating radar surveys, fall 2005, spring 2006, and spring 2007.

CV: Christianson 13 Greenlandic Fieldwork: • Helheim Glacier, passive seismic, GPS, and terrestrial radar interferometry surveys, summer 2014. • Northeast Greenland Ice Stream and North Greenland Eemian Ice Drilling camp, active- source seismic, passive seismic, ice-penetrating radar, and GPS surveys, summer 2012. • Jakobshavn Isbræ, passive seismic and GPS surveys, spring 2009.

Professional Activities

Community Workshop Participation • West Antarctica and future sea-level rise workshop, the Royal Society, London, UK, March 2016. • West Antarctic Science Team Implementation and Science Plan meeting, Boulder, CO, January 2016. • AGU 2015 Fall Meeting Session Chair, Advance in Our Understanding of Processes at the Beds of Ice Sheets and Glaciers, C11A and C14B, San Francisco, CA, December 2015. • Remote Sensing of Outlet Glaciers: Greenland and Antarctica, Center for Sea-Level Change 3rd Annual Workshop, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, May 2014. • Keck Institute for Space Studies Workshop, The Sleeping Giant: Measuring Ocean-Ice Interactions in Antarctica, Pasadena, CA, September and December 2013. • West Antarctic Ice Sheet Workshop, various locations, September 2009–2015. • Ice Rises Workshop, Tromsø, Norway, August 2013. • Radio-Echo Sounding Layer Tracing Workshop, Copenhagen, Denmark, May 2013. • Svartisen Subglacial Laboratory Workshop, Svartisen, Norway, March 2009.

Foreign Collaborations • Joint Installation and maintenance of a geophone array under Engabreen Glacier, Arctic Norway with the Norwegian Water Resources and Energy Directorate. In operation August 2011-present. • Collaborative preliminary geophysical surveys and shallow ice core campaign on the Northeast Greenland Ice Stream with Center for Ice and Climate at the University of Copenhagen and the Alfred Wegener Institute, summer 2012. Additional joint geophysical and deep ice-coring campaigns are proposed for summer 2015-sumer 2018. • Joint field campaigns on Whillans Ice Stream with scientists from Victoria University of Wellington, austral summers 2010 and 2011. Additional jointly funded work at the grounding zone of Kamb Ice Stream, West Antarctica is planned (already funded by New Zealand; submitted to NSF April 2014).

CV: Christianson 14 • Inaugural Nordic Research Opportunity supplement to NSF graduate research fellowship at the Norwegian Water Resources and Energy Directorate, spring-summer 2010. • Fulbright Graduate Student Scholarship with the Norwegian Polar Institute, University Centre on Svalbard, outreach work (online) with the US Embassy in Norway, 2005-2006.

Professional Memberships, Office, Service

• NSF Subglacial Access Working Group 2015-

• NSF West Antarctic Ice Sheet Science Team 2015-

• East Greenland Ice Core Project Scientific Steering Committee 2014–

• Reviewer (~5-10 articles/year): Earth and Planetary Science Letters, Journal of Glaciology, Journal of Geophysical Research, Geology, Geophysics, Science, the Cryosphere.

• NASA Earth and Space Science Fellowship Cryosphere Evaluation Panel 2014

• St. Olaf College Campus Fulbright Committee 2012-2013

• NSF Polar Geospatial Center Scientific and Operations Committee 2011-

• Member: American Geophysical Union European Geosciences Union International Glaciological Society

Language Scientific literacy in Norwegian (bokmål) spoken and written.

Collaborators and Co-Authors (last 48 months; Total=71) A. Achberger (Louis State), R. Alley (Penn State), S. Anandakrishnan (Penn State), E. J. Arnold (Univ Kansas), C. Barbante (CNR, Venice), G. Bertinie (Penn State), R. Bindschadler (NASA), D. Blankenship (UTIG), A. Bowen (WHOI), M. Bushuk (Princeton), S. Carter (Scripps), G. Catania (UTIG), J. Christian (Univ Wash), B. Christner (Louis State), D. Cohen (ETH Zurich), H. Conway (Univ Wash), B. Craig (St Olaf), D. Dahl-Jensen (Univ Copenhagen), T. Dixon (Univ S Florida), P. Dutrieux (Univ Wash), R. Edwards (Penn State), H. A. Fricker (Scripps), T. J. Fudge (Univ Wash.), V. Gkinis (Univ Copenhagen), R. Gobel (St Olaf), S. P. Gogineni (Univ Kansas), D. Holland (New York Univ), C. Holme (Univ Copenhagen), N. Holschuh (Penn State); H. Horgan (Victoria Univ, NZ), N. Iverson (Iowa State), M. Jackson (NVE, Norway), R. Jacobel (St Olaf), M. Jakuba (WHOI), A. Jenkins (BAS), I. Joughin (Univ Wash), N. Karlsson (Univ Copenhagen), B. Keisling (UMass.), S. Kempf (UTIG), S. Kipfstuhl (AWI), H. Kjær (Univ Copenhagen), J. Kohler (NPI, Norway), M. Koutnik (Univ Wash), M. Kristensen (Univ Copenhagen), M. A. Lazzara (Univ Wisc), J. MacGregor (UTIG), M. Mathison (Iowa State), A. Michaud (Mont State), J. Mikucki (Univ Tenn), A. Mitchell (Aberystwyth Univ), P. Moore (Iowa State), P. Morin (Univ Minn), A. Muto (Penn State), F. Nitsche (Columbia), S. Nowicki (NASA), C. Nuth (Univ Oslo), J. Paden (Univ. Kansas), B. Parizek (Penn State), T. Popp (Univ

CV: Christianson 15 Copenhagen), C. Porter (Univ Minn), J. Priscu (Mont State), E. Rignot (UCI), K. Riverman (Penn State), D. Schmidt, (Univ Wash), M. Siegfried (Scripps), M. Skidmore (Mont State), B. Smith (Univ Wash), J. P. Steffensen (Univ Copenhagen), E. Steig (Univ Wash), A. Stern (Princeton) A Svensson (Univ Copenhagen), C. Tibuleac (Univ Copenhagen), R. Walker (NASA), J. P. Winberry (Central Wash Univ), P. Vallelonga (Univ Copenhagen), W. van Pelt (NPI, Norway), T. Vick-Majors (Mont State), B. M. Vinther (Univ Copenhagen),D. Voytenko (Univ S Florida), E. Waddington (Univ Wash), D. Weins (Wash Univ St Louis), Y. Weng (Univ Copenhagen), M. Winstrup (Univ Copenhagen), D. Wolfe (Penn State), A. Wood (St Olaf), D. Young (UTIG), L. Zoet (Univ Wisc)

CV: Christianson 16