1. The Debate Surrounding the “Hockey Stick”
Jeremy Krimmel

2. Outline Introduction Mann’s Side of the Argument
McKitrick and McIntyre’s Turn
Conclusions/My Opinions

3. Introduction What is the “Hockey Stick” and where did it come from?
Why is it so important to the overall debate on global warming?

4. Outline Introduction Mann’s Side of the Argument
McKitrick and McIntyre’s Turn
Conclusions/My Opinions

5. Mann’s Side of the Argument
Proxy indicators
Multiproxy network

6. Mann’s Side of the Argument
Calibration, or “training”
Three Fundamental Assumptions
Eigenvectors

7. Mann’s Side of the Argument
Conclusions
CO2 only a significant forcing factor in 20th century
CO2 increase caused by greenhouse gases

8. Mann’s Side of the Argument

9. Outline Introduction Mann’s Side of the Argument
McKitrick and McIntyre’s Turn
Conclusions/My Opinions

10. McKitrick and McIntyre’s Turn
Mann mined the data for hockey sticks

11. McKitrick and McIntyre’s Turn
Incorrect significance placed on particular data series (bristlecone pines)

12. McKitrick and McIntyre’s Turn
IPCC

13. McKitrick and McIntyre’s Turn
Huang’s Study

14. Outline Introduction Mann’s Side of the Argument
McKitrick and McIntyre’s Turn
Conclusions/My Opinions

15. My Conclusions

16. Thank you!