Skip to main content

Recent high-resolution surface velocities and elevation change at a high-altitude, debris-covered glacier: Chacraraju, Peru

Buy Article:

$35.11 plus tax (Refund Policy)


Surface-elevation change and ice velocities have been measured over the debris-covered tongue of Chacraraju, Peru. Elevation change was measured by reflectorless survey at a 1 m horizontal resolution over three separate areas of the glacier between 2004 and 2005. Area-averaged change revealed general lowering, with two of the surveyed areas experiencing surface lowering of 0.58 and 0.77 m, and the third a rise of 0.07 m. Combining all three areas (43 216 m2) resulted in a mean net lowering of 0.43 ma−1, which is at the higher end of the range of long-term studies in the region. Velocity was measured over 7 days by the repeated optical survey of 12 prisms attached to stakes inserted directly into the glacier's surface. Results indicate that velocity increases approximately with distance squared from the glacier's terminus, from <10 mm d−1 near the terminus to approaching 100 mm d−1 at the base of the glacier's icefall, located ∼1.7 km up-glacier. Velocity vectors also changed systematically along the glacier, from a consistent down-glacier orientation near the icefall to more variable orientations within ∼300 m of the terminus. No up-glacier motion component was measured.

Document Type: Research Article


Publication date: July 1, 2008

More about this publication?
  • The Journal of Glaciology is published six times per year. It accepts submissions from any discipline related to the study of snow and ice. All articles are peer reviewed. The Journal is included in the ISI Science Citation Index.
  • Editorial Board
  • Information for Authors
  • ingentaconnect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more