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

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1016/j.quascirev.2017.02.020

Ключевые слова: Common Era, Last millennium, Northern Hemisphere, Reconstruction, Spatial, Summer temperatures, Tree-rings

Аннотация: 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°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. © 2017 Elsevier Ltd

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Издание

Журнал: Quaternary Science Reviews

Выпуск журнала: Vol. 163

Номера страниц: 1-22

Авторы

  • Anchukaitis K.J. (Lamont-Doherty Earth Observatory of Columbia University)
  • Frank D. (Swiss Federal Research Institute WSL)
  • Klesse S. (Swiss Federal Research Institute WSL)
  • Wilson R. (School of Geography and Geosciences,University of St Andrews)
  • Cook E.R. (Lamont-Doherty Earth Observatory of Columbia University)
  • D'Arrigo R. (Lamont-Doherty Earth Observatory of Columbia University)
  • Davi N. (Department of Environmental Science,William Paterson University)
  • Krusic P.J. (Navarino Environmental Obs.)
  • Rydval M. (Faculty of Forestry and Wood Sciences,Czech University of Life Sciences Prague)
  • Briffa K.R. (Climatic Research Unit,School of Environmental Sciences,University of East Anglia)
  • Osborn T.J. (Climatic Research Unit,School of Environmental Sciences,University of East Anglia)
  • Büntgen U. (Global Change Research Centre and Masaryk University Brno)
  • Esper J. (Department of Geography,Gutenberg University)
  • Gunnarson B.E. (Department of Physical Geography,Stockholm University)
  • Hegerl G. (School of GeoSciences,University of Edinburgh)
  • Schurer A. (School of GeoSciences,University of Edinburgh)
  • Helama S. (Natural Resources Institute Finland)
  • Linderholm H.W. (Department of Earth Sciences,University of Gothenburg)
  • Zhang P. (Department of Earth Sciences,University of Gothenburg)
  • Myglan V. (Siberian Federal University)
  • Schneider L. (Department of Geography,Justus Liebig University)
  • Wiles G. (Tree Ring Lab,The College of Wooster)
  • Zorita E. (Institute of Coastal Research,Helmholtz-Zentrum Geesthacht (HZG))

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