Title: Cirques

Abstract: Glacial cirques are emblematic features of alpine landscapes. Their formation plays a critical role in the evolution of the divide regions of mountain belts, and their presence is used as an indicator of paleoclimate conditions. Over the last decade, my colleagues and I have sought to better understand the erosional processes responsible for cirque formation and the linked problem of cirque glacier dynamics. Cirques are generally understood to be a consequence of the combined action of glacial and periglacial processes. A prevailing view, dating from seminal fieldwork in the 1950s, of cirque glaciers as rigidly-rotating bodies is wrong and should be abandoned. Another idea, dating from the earliest 20th century, of cirque glaciers as eroding headward through a combination of periglacial weathering and glacial action, is probably correct. To examine this hypothesis, we obtained the first year-round measurements of environmental conditions in the headwall crevasses of cirque glaciers.

 

Speaker Information

Name: 

Kurt Cuffey

Title: 

Professor

Department: 

Earth and Planetary Science

Affiliation: 

University of California, Berkeley

Host: 

Mathieu Morlighem

Date and Time: 

Friday, December 8, 2017 - 4:00pm

Location: 

The Jenkins Room | Croul Hall 3101