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

Anchukaitis, Kevin J., Wilson, Rob, Briffa, Keith R., Büntgen, Ulf, Cook, Edward R., D'Arrigo, Rosanne, Davi, Nicole, Esper, Jan, Frank, David, Gunnarson, Björn E., Hegerl, Gabi, Helama, Samuli, Klesse, Stefan, Krusic, Paul J., Linderholm, Hans W., Myglan, Vladimir, Osborn, Timothy J. ORCID: https://orcid.org/0000-0001-8425-6799, Zhang, Peng, Rydval, Milos, Schneider, Lea, Schurer, Andrew, Wiles, Greg and Zorita, Eduardo (2017) Last millennium Northern Hemisphere summer temperatures from tree rings: Part II, spatially resolved reconstructions. Quaternary Science Reviews, 163. pp. 1-22. ISSN 0277-3791

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Abstract

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 (40-90N) using Point-by-Point Regression (PPR). The resulting annual maps of temperature anomalies (750 to 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.

Item Type:	Article
Uncontrolled Keywords:	tree-rings,northern hemisphere,last millennium,common era,summer temperatures,reconstruction,spatial,sdg 13 - climate action ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action
Faculty \ School:	Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups:	Faculty of Science > Research Groups > Climatic Research Unit Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Social Sciences > Research Centres > Water Security Research Centre
Depositing User:	Pure Connector
Date Deposited:	02 Mar 2017 01:41
Last Modified:	14 Jun 2023 12:53
URI:	https://ueaeprints.uea.ac.uk/id/eprint/62807
DOI:	10.1016/j.quascirev.2017.02.020

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