1 / 5

INSTAAR Univ. of Colorado

kalei
Télécharger la présentation

INSTAAR Univ. of Colorado

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Collaborative Research: IPY: Dynamic Controls on Tidewater Glacier RetreatPIs:W.T. Pfeffer, CU INSTAAR/CEAEShad O’Neel, INSTAAR and Scripps/IGPPIan Howat, OSU Byrd PolarHoward Conway, University of Washington EESCollaborators:Jacek Jania, University of SilesiaManfred Stober, Stuttgart University of Applied SciencesEberhard Gülch, Stuttgart University of Applied Sciences Michael Hahn, Stuttgart University of Applied Sciences Al Rasmussen, University of Washington EESAndreas Vieli, Durham University Columbia Glacier, Alaska W.T. Pfeffer INSTAAR Univ. of Colorado NSF Arctic Program

  2. 2004 1979 1993 W.T. Pfeffer (CU INSTAAR) September 2004 Collaborative Research: IPY: Dynamic Controls on Tidewater Glacier Retreat • Columbia Glacier, Prince William Sound: • 1000 km2, 50 km long in 2007 • 17 km retreat since ~1982, average retreat rate ~ 0.6 km yr-1 • Flow speed as great as 27 m d-1 (9.8 km yr-1) • Average iceberg discharge 1982-2006 ~4 km3 yr-1, Max discharge 7 km3 yr-1 • Ungauged basin delivering ~2-3 km3 yr-1 fresh water to PWS • Complete photogrammetric coverage: 134 aerial photo surveys 1976-2007 • Most complete data on marine-based glacier instability and dynamic retreat and best location to study ice dynamics (accelerated iceberg discharge) contributions to sea level rise. INSTAAR Univ. of Colorado NSF Arctic Program

  3. Terminus and velocity field 8 June – 7 July 2005 • 2008 – 2011 Program Objectives: • Obtain better understanding of interaction between climate forcing, marine-grounded glacier dynamics, and sea level rise, using: • Existing record of motion and retreat 1980s-present. • Seismic record of iceberg calving. • Time-lapse sequences of terminus behavior and calving. • New data acquisition including airborne radar, aerial photogrammetry, terrestrial time-lapse sequences. • Analysis, including numerical modeling. • Data archival: 30+ record, presently held in several locations, to be cataloged and placed in single, central source (NSIDC/WDC-A) • New methods: • Improved seismic filters for identifying iceberg calving. • Automated photogrammetric analysis of time-lapse sequences Collaborative Research: IPY: Dynamic Controls on Tidewater Glacier Retreat INSTAAR Univ. of Colorado NSF Arctic Program

  4. Collaborative Plan Collaborative Research: IPY: Dynamic Controls on Tidewater Glacier Retreat New Data Acquisition Pfeffer – Aerial and time lapse imagery O’Neel – Imagery, seismics Conway – Airborne radar Data Archival Pfeffer, O’Neel USGS NSIDC/WDC-A CADIS Columbia Glacier 2008-2011 Data Archival New Imagery Seismics Analysis Photogrammetric Image Processing – Howat, Pfeffer, Gulch, Hahn Terrestrial Photogrammetry – Pfeffer, O’Neel, Jania, Stober, Gulch, Hahn Seismic – O’Neel, Rasmussen Airborne Radar – Conway, O’Neel, Rasmussen Modeling – Pfeffer, O’Neel, Vieli, CReSIS (van der Veen) Field Collaboration Columbia Svalbard Pfeffer Jania O’Neel ddddd Outreach/Education NSF EHR/DRL CU-Boulder CIRES Outreach National Geographic/NOVA BBC INSTAAR Univ. of Colorado NSF Arctic Program

  5. INSTAAR Univ. of Colorado NSF Arctic Program

More Related