The Debate Surrounding the Hockey Stick

1
The Debate Surrounding the Hockey Stick

• Jeremy Krimmel

2
Outline

• Introduction
• Manns Side of the Argument
• McKitrick and McIntyres 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
• Manns Side of the Argument
• McKitrick and McIntyres Turn
• Conclusions/My Opinions

5
Manns Side of the Argument

• Proxy indicators
• Multiproxy network

6
Manns Side of the Argument

• Calibration, or training
• Three Fundamental Assumptions
• Eigenvectors

7
Manns Side of the Argument

• Conclusions
• CO2 only a significant forcing factor in 20th
  century
• CO2 increase caused by greenhouse gases

8
Manns Side of the Argument
9
Outline

• Introduction
• Manns Side of the Argument
• McKitrick and McIntyres Turn
• Conclusions/My Opinions

10
McKitrick and McIntyres Turn

• Mann mined the data for hockey sticks

11
McKitrick and McIntyres Turn

• Incorrect significance placed on particular data
  series (bristlecone pines)

12
McKitrick and McIntyres Turn

• IPCC

13
McKitrick and McIntyres Turn

• Huangs Study

14
Outline

• Introduction
• Manns Side of the Argument
• McKitrick and McIntyres Turn
• Conclusions/My Opinions

15
My Conclusions
16
Thank you!