1. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Observed Changes in Snow, Ice and Frozen Ground Primary Source: IPCC WG-I Chapter 4 - Observations: Changes in Snow, Ice and Frozen Ground

2. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Components of the Cryosphere On land - 75% of world’s freshwater 10% of land surface 7% of ocean surface (annual ave.)

3. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Change in Spring Snowcover March-April Isotherms [˚C] (change during the satellite era)

4. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Ice Freeze & Breakup Dates Northern Lakes and Rivers Later freezing: ~ 6 days/100-yr Earlier breakup: ~ 6 days/100-yr

5. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Change in Sea Ice Extent (National Snow and Ice Data Center)

6. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Arctic Sea Ice Extent 2007: Lowest 2008: Second lowest 2009: Third lowest

7. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4)

8. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4)

9. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4)

10. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4)

11. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4)

12. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Arctic Sea Ice Extent (National Snow and Ice Data Center) 2007: Lowest 2008: Second lowest 2009: Third lowest

13. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Arctic Sea Ice Thickness (National Snow and Ice Data Center)

14. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Changes in Glacier Length

15. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Changes in Glacier Mass Balance

16. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Change in Greenland’s Elevation (2005 - 1998/1999)

17. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Change in Antarctica’s Elevation (2003 - 1992)

18. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Changes in Active-Layer Thickness and Depth of Seasonal Freeze 5%-95% confidence interval

19. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Area of Seasonally Frozen Ground (Northern Hemisphere)

20. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) Summary of Changes

21. (Mt/Ag/EnSc/EnSt 404/504 - Global Change) Observed Snow & Ice (from IPCC WG-I, Chapter 4) END Observed Changes in Snow, Ice and Frozen Ground