Osborn and Briffa (2006)

Timothy J. Osborn* and Keith R. Briffa, The Spatial Extent of 20th-Century Warmth in the Context of the Past 1200 Years, Science 10 February 2006: Vol. 311. no. 5762, pp. 841 - 844 DOI: 10.1126/science.1120514

Abstract

Periods of widespread warmth or cold are identified by positive or negative deviations that are synchronous across a number of temperature-sensitive proxy records drawn from the Northern Hemisphere. The most significant and longest duration feature during the last 1200 years is the geographical extent of warmth in the middle to late 20th century. Positive anomalies during 890 to 1170 and negative anomalies during 1580 to 1850 are consistent with the concepts of a Medieval Warm Period and a Little Ice Age, but comparison with instrumental temperatures shows the spatial extent of recent warmth to be of greater significance than that during the medieval period.

Available here.

Note need to sort out just which Briffa article goes with which post and split them up.

“Modern Sample Bias”, RCS and Briffa’s “Adjustment”
Review of Osborn and Briffa 2006
The Proxies of Osborn and Briffa 2006
The Yamal Substitution
Briffa: Large-Scale Decline in Ring Widths
Letter to Science re Osborn and Briffa Data
A Briffa Collation
Yamal Substitution #3
Reply to Science
Polar Urals: Briffa versus Esper
More Correspondence with Science
Another Inch at Sciencemag
Taimyr in Esper and Osborn-Briffa
O.B. Confidential
More O.B. Confidential
Science - Email #39
In the Mail
Hegerl Proxies: #1 - Mann PC1
The “Independent” 2006 Multiproxy Studies
Briffa et al 2001 - More on Divergence
New Light on Old Fudge
Burger Comment on Osborn and Briffa 2006
IPCC AR4 and the Return of Chucky - He’s Baaack!
Strip Bark at Upper Wright Lakes Foxtails

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