The complete corrigendum FYI
Corrigendum
Global-scale temperature patterns and climate forcing over the past six centuries Michael E. Mann, Raymond S. Bradley & Malcolm K. Hughes Nature 392, 779–787 (1998). ............................................................................................................................................................................
It has been drawn to our attention (S. McIntyre and R. McKitrick) that the listing of the ‘proxy’ data set in the Supplementary Information published with this Article contained several errors. In Table 1 we provide a list of the records that were either mistakenly included in the Supplementary Information, or mistakenly left out. A small number of other corrections of the original listing include (see Table 1) corrections of the citations originally provided, or corrections of the start years for certain series. The full, corrected listing of the data is supplied as Supplementary Information to this corrigendum. Also provided as Supplementary Information are a documented archive of the complete data (instrumental and ‘proxy’ climate series) used in our original study, and an expanded description of the methodological details of our original study. None of these errors affect our previously published results1 .
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1. Mann, M. E., Bradley, R. S. & Hughes, M. K. Global-scale temperature patterns and climate forcing over the past six centuries. Nature 392, 779–787 (1998).
2. Bradley, R. S. & Jones, P. D. “Little ice age” summer temperature variations: their nature and relevance to recent global warming trends. The Holocene 3, 367–376 (1993).
3. Briffa, K. R. et al. Fennoscandian summers from AD500: temperature changes on short and long timescales. Clim. Dyn. 7, 111–119 (1992).
4. Stahle, D. W. et al. Experimental dendroclimatic reconstruction of the Southern Oscillation. Bull. Am. Meteorol. Soc. 79, 2137–2152 (1998).
5. Mann, M. E. et al. Global temperature patterns in past centuries: An interactive presentation. Earth Inter. 4-4, 1–29 (2000). Supplementary Information accompanies this corrigendum on
www.nature.com/nature. Table 1 Errors in ‘proxy’ data set listing in ref. 1
Series (34) listed in original Supplementary Information but not used in ref. 1.* .............................................................................................................................................................................
FRAN003; ITAL015 and ITAL015X; SPAI026 and SPAI047; NEWZ056; ARGE030, ARGE060 and ARGE065; CHIL015, CHIL016, CHIL017 and CHIL018; AK006 and AK006X; CA070; CANA053, CANA053X, CANA096, CANA096X, CANA099, CANA106 and CANA110; WA019, WA025, WA027, WA033, WA039, WA041, WA071, WA074, WA086, WA088 and WA091; VAGANOV55 .............................................................................................................................................................................
Series (2) used in ref. 1 but not listed in original Supplementary Information .............................................................................................................................................................................
Unpublished Southwest US/Mexico Density series (D. W. Stahle, personal communication)
Unpublished Southwest US/Mexico Latewood Width series (D. W. Stahle, personal communication) .............................................................................................................................................................................
Additional minor corrections .............................................................................................................................................................................
(1) The Central England and Central European temperature records used by ref. 1 were the summer season versions of these series as used by ref. 2.
(2) The ‘long instrumental’ series used in ref. 1 are station temperature and precipitation station data from the NOAA Climate Data centre gridded at 58 latitude/longitude resolution.
(3) The start year for the ‘Central Europe’ series of ref. 1 is AD 1525.
(4) The ‘Western North America Dendro density’ series used in ref. 1 should properly be attributed to ref. 3.
(5) The Stahle et al. Southwestern/Mexico late wood width and maximum density data used in ref. 1 should properly be attributed to ref. 4 (the formal reference was not available at the time of ref. 1), or, in two cases, unpublished data (D. W. Stahle, personal communication).
(6) For one of the 12 ‘Northern Treeline’ records of Jacoby et al. used in ref. 1 (the ‘St Anne River’ series), the values used for AD 1400–03 were equal to the value for the first available year (AD 1404). .............................................................................................................................................................................
*These series, all of which come from the International Tree Ring Data Bank (ITRDB), met all the tests used for screening of the ITRDB data used in ref. 1 (see ref. 5), except one—namely, that in 1997, either it could not be ascertained by the authors how these series had been standardized by the original contributors, or it was known that the series had been aggressively standardized, removing multidecadal to century-scale fluctuations.