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Michael E. Mann, Raymond S. Bradley and Malcolm K

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Presentation on theme: "Michael E. Mann, Raymond S. Bradley and Malcolm K"— Presentation transcript:

1 Global-Scale Temperature Patterns and Climate Forcing over the Past Six Centuries
Michael E. Mann, Raymond S. Bradley and Malcolm K. Hughes, 1998: Nature, 392, (23 April 1998) + Corrigendum: Nature, 430, 105 (1 July 2004)

2 Distribution of Annual Proxy Records
(Mann et al. 1998)

3 Available Temperature Grid Boxes
(from instruments) (Mann et al. 1998) Shaded = Boxes =

4 Leading EOFs of Temperature (1902-1980)
(Mann et al. 1998)

5 Calibration/Verification Statistics
(Mann et al. 1998) Calibration = Verification =

6 Proxy Reconstruction vs. Instrument Record
(Mann et al. 1998) 1941 = El Niño year

7 Proxy Reconstruction vs.
Documentary Evidence 1791 = strong El Niño year 1816 = after Tambora eruption (April 1815) (Mann et al. 1998)

8 Trends in Reconstructed Principal Components
(Mann et al. 1998)

9 Trend in Reconstructed Northern Hemisphere Temperature
(Mann et al. 1998)

10 NH Reconstructed T vs. Candidate Forcings
NH Temperature Solar Log(CO2) Correlation of 200-yr running average NH temperature vs. forcings Dust Veil Index (Mann et al. 1998)


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