Past and future impacts on the landscape and drainage of the Yorkshire Dales (Part 1)

1. CLIMATE CHANGE Past and future impacts on the landscape and drainage of the Yorkshire Dales (Part 1) Dr Aidan Foley

2. Structure • Climate Change – sun/earth interactions over geological time • UK Ice Sheets & Ice Processes • Impacts on Surface and Subterranean Drainage • Climate Change – the last 10,000 years and anthropogenic factors • Likely impacts on rivers • The role of groundwater • Likely management issues & restoration

3. Milankovitch cycles

4. Milankovitch cont. On the basis of Milankovitch cycles, no glaciations are predicted for 30,000 yrs. Milankovitch, M. (1920) Mathematical Theory of Heat Phenomena Produced by Solar Radiation

5. Climate Change ~ 500 Million years Veizer et al. (1999); Wikimedia Commons

6. Climate Change ~ 5 Million Years Lisiecki and Raymo (2005) Wikimedia Commons

7. Climate Change ~ 0.5 million years Petit et al. 1999; Lisiecki and Raymo (2005); Wikimedia Commons

8. UK Ice Sheet Extent

9. Glacial landforms northern UK

10. Main ice centres, last glaciation

11. Landscape Evolution

12. Glacial Processes

13. Glacial Processes cont.