Maps that Matter

'Hockey sticks' global warming graph

Date: 1998

Creator: Michael E. Mann and co-workers

• Published in an influential 1998 Nature article, Mann et al, Global-Scale Temperature Patterns and Climate Forcing Over the Past Six Centuries.
• Visualization of implied anthropogenic induced global warming provoked significant controversy and frequent reworkings of both data series and its representation, for example in the Third IPCC report.
  

(Source: Brumfiel G, (2006) "Academy affirms hockey-stick graph", Nature 441, 1032-33.)