1. One Hundred Years of Arctic Surface Temperature Variation Fyfe 1, von Salzen 1, Gillett 1, Arora 1, Flato 1 & McConnell 2 1 Canadian Centre for Climate Modelling and Analysis 2 Desert Research Institute, Reno NV

2. What are roles of natural variability and anthropogenic forcing in Arctic surface temperature variation since 1900? Main Question

3. Fyfe et al. (2013)

4. Piecewise linear trends

5. Fyfe et al. (2013)

6. SO 4 deposition on Greenland Fyfe et al. (2013)

7. SO 4 concentration at Alert 1980-2005

8. Fyfe et al. (2013) Role of volcanic emissions

9. Fyfe et al. (2013) Role of the Atlantic Multidecadal Oscillation

10. Anthropogenic and volcanic emissions explain most of the Arctic temperature variation since 1900 Main Result Fyfe et al. (2013)

11. One Hundred Years of Arctic Surface Temperature Variation Fyfe 1, von Salzen 1, Gillett 1, Arora 1, Flato 1 & McConnell 2 1 Canadian Centre for Climate Modelling and Analysis 2 Desert Research Institute, Reno NV