what do glaciers tell us when they growl
DESCRIPTION
A review of the current status of glaciers and sea ice in the Canadian Arctic and Greenland. An examination of the current retreat of glaciers and the fast disapearing sea ice.TRANSCRIPT
WHAT DO GLACIERS TELL US WHEN THEY GROWL?
BY
Robert Denis
HOW OLD AM I?
FROM SNOW TO GLACIER ICE
Snow Ice Glacier ice
Glacier icecrystals
A continuum
4
Features of a glaciated landscape (Gibbs Fjord, Baffin Is.)
HORN
SNOW FIELDCIRQUE
ARÊTES
ICE-FALLS
MEDIAL MORAINE
LATERAL MORAINE
AVALANCHE
Major Features:
Icecap Glacier
Moraine
U shaped valleys, and cirques Evighets Fjord, Greenland
Cirques in Hebron Fjord, Labrador
Bucchan Fjord, Truncated Spurs
1900 limit
Icecap
Glacier Bed
U shaped valley
A FEW MORE DETAILS!
GLACIAL DEBRIS ON OCEAN FLOOR ICEBERGS
Major Features of a glacier tongue:
U shaped valleys
Frontal moraine
Evidence of glacial retreat since ~1900
Glacier snout Evighets Fjord
BUCCHAN FJORD, BAFFIN ISLAND
Lateral Moraine
Snow line
Bucchan Gulf
1
2
Sea level changes in the last ~500 years
Radstock Bay, Devon Island
As it was in the 14-15th century
Thule sites
Sea level changes in the last ~500 years
Thule sites
Radstock Bay, Devon Island
As it is now
An ARCHIVE of our PAST
Scientists at work on an Ellesmere Ice Cap
Playing in the snow
Ice core with layers
Vostock Core
An example of climate change
Where do icebergs come from?The Ilulissat Icefjord
WHY DID THE TITANIC SINK?
12%
“I DON’T CARE WHO YOU ARE, I AIN’T MOVING”
FROM ‘ICEBERG ALLEY’ EAST BAFFIN COAST
Magnificent sculptures to dream about
THE CASE OF GREENLAND
~3000 m. of ice
1992 2002
….and with no ice
1980 1990 2000 2010 2020 2030 2040 2050
2080
4
3
2
1
0
Maslowski et al. 2005
Holland et al. 2007
HOW OLD AM I?
KR =photo by Kerry Rodriguez 2003
THANK YOU VERY MUCH
Merci beaucoup
Robert
et
Grand’papaKR
NAW KOH RAMI