Post on 20-Jan-2016
transcript
Monitoring Earths ice sheets from space
Andrew Shepherd
School of Geosciences, Edinburgh
Monitoring Earths ice sheets from space
Climate change
Satellite observations
Ice Sheets and Sea level
Monitoring Earths ice sheets from space
Climate change
Monitoring Earths ice sheets from space
Slow climate change
Climate Change
Mt Kilimanjaro, 1993
Monitoring Earths ice sheets from space
Slow climate change
Climate Change
Mt Kilimanjaro, 2000
Monitoring Earths ice sheets from space
Abrupt climate change
Sea level contribution of Antarctica & Greenland Climate Change
Monitoring Earths ice sheets from space Climate Change
Abrupt climate change
Larsen Ice Shelf, 2002
Monitoring Earths ice sheets from space
Abrupt climate change
Larsen embayment, 2005
Climate Change
Monitoring Earths ice sheets from space
Domack et al., 2005
Climate Change
Abrupt climate change
Larsen sea bed, 2005
Monitoring Earths ice sheets from space
IPCC, 2001
IPCC Assessment reports (1990, 1995, 2001)
Global warming
0.6 C rise since 1900
Climate Change
Monitoring Earths ice sheets from space
IPCC, 2001
Global sea level rise
IPCC Assessment reports (1990, 1995, 2001)
15 cm rise since 1900
Climate Change
Monitoring Earths ice sheets from space
Thermal expansion
Glaciers & ice caps
Greenland
Antarctica
Measured sea level
1961-2003Climate Change
1993-2003
Monitoring Earths ice sheets from space Climate Change
Monitoring Earths ice sheets from space Climate Change
Monitoring Earths ice sheets from space
Satellite observations
Monitoring Earths ice sheets from space
Altimetry Interferometry Gravimetry
Monitoring Earths ice sheets from space
Monitoring Earths ice sheets from space Satellite observations
Altimetry
Monitoring Earths ice sheets from space
Mass change from volume change
Satellite observations
Altimetry
Monitoring Earths ice sheets from space Satellite observations
Interferometry
Monitoring Earths ice sheets from space Satellite observations
Interferometry
Monitoring Earths ice sheets from space
Mass change from glacier flow
Satellite observations
Interferometry
Monitoring Earths ice sheets from space Satellite observations
Gravimetry
Monitoring Earths ice sheets from space
Mass change from orbit change
Satellite observations
Gravimetry
Monitoring Earths ice sheets from space
Sea level contribution
Monitoring Earths ice sheets from space
343 km3 ~ 1mm global sea level
=
1 km
1 km
1 km
7 km
7 km
7 km
Sea level
1 km3= 270 pints per person
=
Monitoring Earths ice sheets from space
Greenland
Monitoring Earths ice sheets from space Greenland
0.0 to 0.6 mm per year
Monitoring Earths ice sheets from space Greenland
Monitoring Earths ice sheets from space
Antarctica
Monitoring Earths ice sheets from space Antarctica
-0.1 to +0.4 mm per year
Monitoring Earths ice sheets from space Antarctica
Monitoring Earths ice sheets from space
Satellite observations reveal sudden and recent changes in ice sheet flow
Climate models do not include these processes
Sea level projections are therefore of limited value
Summary
Monitoring Earths ice sheets from space
UK today
Summary
Monitoring Earths ice sheets from space
UK today
No PolarIce Sheets
Summary