Last millennium Northern Hemisphere summer temperatures from tree rings: Part II, spatially resolved reconstructions

QUATERNARY SCIENCE REVIEWS

卷:163

Review

Anchukaitis, Kevin J.^1,2,3  Wilson, Rob^3,4  Briffa, Keith R.⁵  Buntgen, Ulf^6,7,8,9  Cook, Edward R.³  D'Arrigo, Rosanne³  Davi, Nicole^3,10  Esper, Jan¹¹  Frank, David⁷  Gunnarson, Bjorn E.¹²  Hegerl, Gabi¹³  Helama, Samuli¹⁴  Klesse, Stefan^2,7  Krusic, Paul J.^3,12,15  Linderholm, Hans W.¹⁶  Myglan, Vladimir¹⁷  Osborn, Timothy J.⁵  Zhang, Peng¹⁶  Rydval, Milos^4,18  Schneider, Lea¹⁹  Schurer, Andrew¹³  Wiles, Greg²⁰  Zorita, Eduardo²¹ 

[1] Univ Arizona, Sch Geog & Dev, Tucson, AZ 85721 USA

[2] Univ Arizona, Lab Tree Ring Res, Tucson, AZ 85721 USA

[3] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA

[4] Univ St Andrews, Sch Geog & Geosci, St Andrews, Fife, Scotland

[5] Univ East Anglia, Sch Environm Sci, Climat Res Unit, Norwich, Norfolk, England

[6] Univ Cambridge, Dept Geog, Cambridge, England

[7] Swiss Fed Res Inst WSL, Birmensdorf, Switzerland

[8] Global Change Res Ctr, Brno, Czech Republic

[9] Masaryk Univ, Brno, Czech Republic

[10] William Paterson Univ, Dept Environm Sci, Wayne, NJ USA

[11] Gutenberg Univ, Dept Geog, Mainz, Germany

[12] Stockholm Univ, Dept Phys Geog, Stockholm, Sweden

[13] Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland

[14] Nat Resources Inst Finland, Rovaniemi, Finland

[15] Navarino Environm Obs, Messinia, Greece

[16] Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden

[17] Siberian Fed Univ, Krasnoyarsk, Russia

[18] Czech Univ Life Sci Prague, Fac Forestry & Wood Sci, Prague, Czech Republic

[19] Justus Liebig Univ, Dept Geog, Giessen, Germany

[20] Coll Wooster, Tree Ring Lab, Wooster, OH 44691 USA

[21] HZG, Inst Coastal Res, Hamburg, Germany

关键词: Tree-rings;    Northern Hemisphere;    Last millennium;    Common Era;    Summer temperatures;    Reconstruction;    Spatial;   

DOI  :  10.1016/j.quascirev.2017.02.020

来源: Elsevier

【 摘 要 】

Climate field reconstructions from networks of tree-ring proxy data can be used to characterize regional scale climate changes, reveal spatial anomaly patterns associated with atmospheric circulation changes, radiative forcing, and large-scale modes of ocean-atmosphere variability, and provide spatiotemporal targets for climate model comparison and evaluation. Here we use a multiproxy network of tree-ring chronologies to reconstruct spatially resolved warm season (May August) mean temperatures across the extratropical Northern Hemisphere (40-90 degrees N) using Point-by-Point Regression (PPR). The resulting annual maps of temperature anomalies (750-1988 CE) reveal a consistent imprint of volcanism, with 96% of reconstructed grid points experiencing colder conditions following eruptions. Solar influences are detected at the bicentennial (de Vries) frequency, although at other time scales the influence of insolation variability is weak. Approximately 90% of reconstructed grid points show warmer temperatures during the Medieval Climate Anomaly when compared to the Little Ice Age, although the magnitude varies spatially across the hemisphere. Estimates of field reconstruction skill through time and over space can guide future temporal extension and spatial expansion of the proxy network. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free