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Knut Christianson


Courses Taught

Quarter/Year
Dept
Course #
Credits
Enrollment
% Responsible
Co-Instructor(s)
Fall 2015ESS43142125Waddington, Conway, Koutnik, Hallet, Light, Roe
Fall 2015ESS50545100
Winter 2016ESS5313250Warren
Winter 2016ATM S51031 (+1 audit)50Warren

UW Class Seminars and Lectures

Date(s)
Dept/Other
Course #
Location
Type-of-instruction/Title-of-talk
11/10/2015ESS594JHN022Glaciology in ESS

Professional Talks and Presentations

Date
Organization
Event
Invited/Contributed
Type
Title
Dec 2015American Geophysical UnionFall MeetingCTalkExternal forcing modulates Pine Island Glacier Flow
Sep 2015West Antarctic Ice Sheet InitiativeAnnual WorkshopITalkExternal forcing modulates Pine Island Glacier flow
Aug 2015International Glaciological SocietySymposium on Contemporary Ice Sheet DynamicsCTalkExternal forcing modulates Pine Island Glacier flow
Apr 2015New England Glaciology GroupNew England Glaciology MeetingCTalkPine Island Glacier response to external forcing
Dec 2014American Geophysical UnionFall MeetingCTalkInterpretation or radar basal reflectivity in ice-sheet grounding zones
Sep 2014West Antarctic Ice Sheet InitiativeAnnual WorkshopITalkInference of grounding-zone water properties from radar basal reflectivity
May 2014International Glaciological SocietySymposium on the Contribution of Glaciers and Ice Sheets to Sea-Level RiseCTalkThe role of grounding-zone process in sea-level rise
Apr 2014European Geosciences UnionAnnual General AssemblyCTalkIce-sheet (de)stabilization via grounding-zone processes
Apr 2014CaltechEnvironmental Science and Engineering SeminarITalkIs there a need for an ice-sheet/ocean observation system?
Dec 2013American Geophysical UnionFall MeetingITalkIce-sheet (de)stabilization via grounding-zone processes
Dec 2013American Geophysical UnionFall MeetingCPosterIn-situ creation of internal layer folds in radio-echo sounding data of ice sheets from variable basal conditions
Oct 2013West Antarctic Ice Sheet InitiativeAnnual WorkshopCTalkSubglacial water and sediment transport across the grounding zone of Whillans Ice Stream, West Antarctica
Sep 2013International Glaciological SocietyRadioglaciology SymposiumCTalkRadar/seismic imaging of a subglacial estuary at the grounding zone of Whillans Ice Stream
Aug 2013Climate and Cryosphere; Norwegian Polar InstituteIce Rises WorkshopCPosterSubglacial Water and Sediment Transport across the Grounding Zone of Whillans Ice Stream, West Antarctica
May 2013Center for Ice and Climate, University of CopenhagenRadio-echo sounding layer tracing workshopITalkUsing active-source seismology to constrain radar derived basal conditions
April 2013European Geosciences UnionAnnual General AssemblyCTalkSelf-stabilizing ice-stream flow in northeast Greenland
April 2013European Geosciences UnionAnnual General AssemblyCPosterSubglacial Water and Sediment Transport across the Grounding Zone of Whillans Ice Stream
2013-2015Various: EGU, AGU, IGS, CliC, NEGM, WAISConferencesCTalks/PostersCo-author on 27 presentations by colleagues and students

Public and Community Service

Date
Organization/Event
Type of Service
ongoingAmerican Geophysical Unionmember/session convener
ongoingEuropean Geosciences Unionmember
ongoingInternational Glaciological Societymember
ongoingNSF Polar Geospatial Center Science and Operations Committeemember
ongoingNSF/NASA West Antarctic Science Teammember
ongoingEast Greenland Ice Core Project Scientific Steering Committeemember
Mar 2016Royal Society Workshop on "West Antarctica and future sea-level rise"participant
Jan 2016West Antarctic Science Team Implementation and Science Plan meetingparticipant
Dec 2015American Geophysical Union Fall Meetingsession chair, Advances in Our Understanding of Processes at the Beds of Ice Sheets and Glaciers, C11A and C14B
May 2014Center for Sea-Level Change 3rd Annual Workshop, New York University Abu Dhabiparticipant
Sep and Dec 2014Keck Institute for Space Studies Workshop, The Sleeping Giant: Measuring Ocean-Ice Interactions in Antarcticaparticipant

Recent Publications and Manuscripts in the Press

19 peer-reviewed manuscripts in the past 3 years.
*indicates student co-author.

1. 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 Ice Shelf, Antarctica, Geophysical Research Letters, 42, 250–255, doi: 10.1002/2015GL066612. (Peer-reviewed).

2. 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,
Annual Reviews of Earth and Planetary Sciences, 43, 207–231, doi: 10.1146/annurev-earth- 060614-105344. (Peer-reviewed).

3. 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. (Peer-reviewed).

4. 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. (Peer-reviewed).

5. 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 Planetary Science Letters, 401, 57–69,
doi: 10.1016/j.epsl.2014.05.060. (Peer-reviewed).

6. 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. Subglacial Lake Whillans: A microbial system beneath the West Antarctic Ice Sheet, Nature, 512, 310–313 , doi: 10.1038/nature13667. (Peer-reviewed).

7. 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. (Peer-reviewed).

8. 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. (Peer-reviewed).

9. 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.(Peer-reviewed).

10. 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. (Peer-reviewed).

11. 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. (Peer-reviewed).

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. (Peer-reviewed).

13. 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. (Peer-reviewed).

14. 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. (Peer-reviewed).

15. 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. (Peer-reviewed).

16. Muto, A., K. Christianson, H. J. Horgan, S. Anandakrishnan, and R. B. Alley, 2013. Bathymetry and geological structures beneath the Ross Ice Shelf 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. (Peer-reviewed).

17. 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. (Peer-reviewed).

18. 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. (Peer-reviewed).

19. 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. (Peer-reviewed).

Current Research Interests

Glaciology: ice–ocean interactions, ice-sheet grounding zone processes, englacial and subglacial hydrology, glacier seismicity, englacial temperature structure, calving processes

Geophysics: ground-penetrating radar, active-source seismology, terrestrial radar interferometry, kinematic GPS


Current C.V. URL

http://www.ess.washington.edu/ess/people/cv/Christianson_Knut_CV.pdf

In the News

Our recent work on glacier perennial firn aquifers (published in Geophysical Research Letters) has been featured in a few news articles between March and October 2015:

http://www.livescience.com/50106-glacier-stores-water-year-round.html

http://news.yahoo.com/arctic-glacier-own-aquifer-125118823.html

https://eos.org/research-spotlights/near-surface-aquifer-discovered-on-svalbard-glacier

The GRL publication is here: http://onlinelibrary.wiley.com/doi/10.1002/2014GL062806/abstract

The Whillans Ice Stream Subglacial Access Research Drilling project directly instrumented a subglacial lake and ice-stream grounding zone and has garnered widespread media attention. We provided the site survey information to allow subglacial access drilling and conducted glaciological and geophysical studies at both drill sites. See http://www.wissard.org/news for a comprehensive list of news articles.


Comments

Whillans Ice Stream Subglacial Access Research Drilling website: http://www.wissard.org/

University of Washington Future of Ice Initiative: http://ice.washington.edu/
University of Washington Polar Day: http://ice.washington.edu/2016/03/21/uw-polar-day/

West Antarctic Ice Sheet Initiative: https://www.waisworkshop.org/

Climate and Cryosphere: http://www.climate-cryosphere.org/