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Andrew Shepherd School of Geosciences, Edinburgh

Andrew Shepherd School of Geosciences, Edinburgh. Climate change Satellite observations Ice Sheets and Sea level. Climate change. Climate Change. Slow climate change. Mt Kilimanjaro, 1993. Climate Change. Slow climate change. Mt Kilimanjaro, 2000.

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Andrew Shepherd School of Geosciences, Edinburgh

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  1. Andrew Shepherd School of Geosciences, Edinburgh

  2. Climate change Satellite observations Ice Sheets and Sea level

  3. Climate change

  4. Climate Change • Slow climate change Mt Kilimanjaro, 1993

  5. Climate Change • Slow climate change Mt Kilimanjaro, 2000

  6. Sea level contribution of Antarctica & Greenland Climate Change • Abrupt climate change

  7. Climate Change • Abrupt climate change Larsen Ice Shelf, 2002

  8. Climate Change • Abrupt climate change Larsen embayment, 2005

  9. Climate Change • Abrupt climate change Larsen sea bed, 2005 Domack et al., 2005

  10. Climate Change • IPCC Assessment reports (1990, 1995, 2001) 0.6 C rise since 1900 Global warming IPCC, 2001

  11. Climate Change • IPCC Assessment reports (1990, 1995, 2001) 15 cm rise since 1900 Global sea level rise IPCC, 2001

  12. Measured sea level Thermal expansion Glaciers & ice caps Greenland Antarctica Climate Change 1961-2003 1993-2003

  13. Climate Change

  14. Climate Change

  15. Satellite observations

  16. Monitoring Earths ice sheets from space Altimetry Interferometry Gravimetry

  17. Satellite observations Altimetry

  18. Mass change from volume change Satellite observations Altimetry

  19. Satellite observations Interferometry

  20. Satellite observations Interferometry

  21. Mass change from glacier flow Satellite observations Interferometry

  22. Satellite observations Gravimetry

  23. Mass change from orbit change Satellite observations Gravimetry

  24. Sea level contribution

  25. 1 km 1 km = 1 km 1 km3= 270 pints per person 7 km 7 km 7 km = 343 km3 ~ 1mm global sea level Sea level

  26. Greenland

  27. Greenland 0.0 to 0.6 mm per year

  28. Greenland

  29. Antarctica

  30. Antarctica -0.1 to +0.4 mm per year

  31. Antarctica

  32. Summary • 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

  33. Summary UK today

  34. Summary UK today No Polar Ice Sheets

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