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Michele Koppes 1 Bernard Hallet 1 John Anderson 2 Julia Smith Wellner 2

Controls on Sediment Yields from Tidewater Glaciers, Patagonia to Antarctica. Michele Koppes 1 Bernard Hallet 1 John Anderson 2 Julia Smith Wellner 2 1 University of Washington, Seattle, WA, USA 2 Rice University, Houston, TX, USA. Collaborators: Gino Casassa, Andres Rivera

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Michele Koppes 1 Bernard Hallet 1 John Anderson 2 Julia Smith Wellner 2

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  1. Controls on Sediment Yields from Tidewater Glaciers, Patagonia to Antarctica • Michele Koppes1 • Bernard Hallet1 • John Anderson2 • Julia Smith Wellner2 • 1University of Washington, Seattle, WA, USA • 2Rice University, Houston, TX, USA • Collaborators: • Gino Casassa, Andres Rivera • Centro de Estudios Cientificos, Chile • Eric Rignot, • NASA-Jet Propulsion Laboratory • Howard Conway, Charlie Raymond, Al Rasmussen • University of Washington • Carina Lange, • Universidad de Concepcion, Chile

  2. From Porter (1981) Calls for a climatic, as well as tectonic, control on mountain building

  3. Patagonia buzzsaw From Montgomery, Balco and Willett, 2001

  4. From Koppes and Hallet (in press)

  5. From Anderson, 1999

  6. Patagonia Antarctic Peninsula 2005-2006 2007 Hope Bay San Rafael 47ºS Penguino/Europa 50ºS Marinelli 54ºS Andvord Bay

  7. Measuring sediment fluxes Measuring ice dynamics Seismic: InSAR: GPS: Radiocarbon: IPR: Swath bathymetry: Climate records:

  8. Erosion and retreat rates, Marinelli Glacier, 1967-2005 Erosion rate (mm/yr) Retreat rate (m/yr) Erosion rate (mm/yr) Retreat rate (m/yr)

  9. Marinelli Glacier Cordillera Darwin, Tierra del Fuego Basin area 2005 = 1.5 x 108 m2 Basin area 1913 = 2.52 x 108 m2 Ice volume lost since 1913 1.54 x 1010 m3 Mt. Shipton, 2469 m.

  10. Ground-truth NCEP reanalysis data with AWS stations

  11. 9 Balance flux, w/ annual precipitation rate ~3m Volume of ice lost from terminus, per year 8 7 6 5 Ice flux , x 108 m3/a 4 3 2 1 0 Ice loss as a percentage of total flux (balance flux + calving flux) when annual accumulation = 3 m.w.e. 12% 22% 56% 38%

  12. IPY Peninsula work Marine work scheduled for April 2007 (NBP0703) Land-based work - April 2007?? GPS (surface velocity), Ice penetrating radar New opportunity with airborne radar – need airplane!

  13. King George Island Arctowski Ice Cap Moczydlowski Glacier Maxwell Bay Fourcade Glacier

  14. Anvers Island Lapeyrere Bay Iliad Glacier Marr Ice Piedmont Palmer Station (USA)

  15. Bagshaw Glacier Andvord Bay

  16. Paul Claus, Ultima Thule Photos by H. Conway

  17. 0 250 500 750 1000 1250 20 25 30 35 40 45 distance along profile from terminus, km Radar Profile from Bering Glacier, Alaska, March 2006 depth, m From B. Smith

  18. HOW’S MY LOGISTICS? CALL 1-206-543-1975 (koppes@u.washington.edu)

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