Contrary to the position taken by Kelly and Ó Gráda, a rich body of regional- to large-scale temperature reconstructions that span from the last millennium to almost the entire Holocene confirms the existence of several temperature depressions that occurred at different intensities and spatial ranges between c. 1350 and 1900, thus supporting the conception of a Little Ice Age. Nonetheless, the genuine uncertainties that continue to surround paleoclimatic study suggest that methodologies and findings are subject to further refinement.

Issue Section:
Comment and Commentary
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© 2013 by The Massachusetts Institute of Technology and the Journal of Interdisciplinary History, Inc.
2013

Supplementary data

Figure 1

Different Methods and Reconstructions of Global-Scale and Holocene-Long Temperature Anomalies

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Figure 2

Annual and Twenty-Year, Low-Pass-Filtered, Continental-Scale Temperature Reconstructions

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Figure 3A-3E

Figure 3A Low-frequency Estimates of Solar Activity (Purple Line) and Sunspot Activity (Pink Line)

Figure 3B Reconstructions of June–August and April–September Temperature Anomalies from Tree-Ring Width (Orange) and Maximum Latewood Density (Red) (with Respect to the 1901–2000 Reference Period)

Figure 3C Chironomid-Inferred Mean July Temperatures

Figure 3D Estimates of the Radiative Forcing of Volcanic Eruptions

Figure 3E Length Fluctuations and Fifty-Year-Average Mass Balance (Light Blue Boxes) of the Great-Aletsch Glacier

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Figure 4

Collecting Disc Samples from Subfossil Wood Recently Released by the Morteratsch Glacier in the Southeastern Swiss Alps, Canton Grison

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Figure 5

Current Limitations Affecting The Improvement Of Millennium-Long Temperature Reconstructions

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