Revising midlatitude summer temperatures back to AD600 based on a wood density network

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1002/2015GL063956

Ключевые слова: maximum latewood density, tree rings, millennial reconstruction, volcanic cooling, Little Ice Age, beta value, Cooling, Forestry, Glacial geology, Low and high frequencies, Northern Hemispheres, Temperature variability, Volcanic eruptions, Volcanoes

Аннотация: Annually resolved and millennium-long reconstructions of large-scale temperature variability are primarily composed of tree ring width (TRW) chronologies. Changes in ring width, however, have recently been shown to bias the ratio between low- and high-frequency signals. To overcome limitations in capturing the full spectrum of past temperature variability, we present a network of 15 maximum latewood density (MXD) chronologies distributed across the Northern Hemisphere extratropics. Independent subsets of continental-scale records consistently reveal high MXD before 1580 and after 1910, with below average values between these periods. Reconstructed extratropical summer temperatures reflect not only these long-term trends but also distinct cooling pulses after large volcanic eruptions. In contrast to TRW-dominated reconstructions, this MXD-based record indicates a delayed onset of the Little Ice Age by almost two centuries. The reduced memory inherent in MXD is likely responsible for the rapid recovery from volcanic-induced cooling in the fourteenth century and the continuation of warmer temperatures until similar to 1600.

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Издание

Журнал: GEOPHYSICAL RESEARCH LETTERS

Выпуск журнала: Vol. 42, Is. 11

Номера страниц: 4556-4562

ISSN журнала: 00948276

Место издания: WASHINGTON

Издатель: AMER GEOPHYSICAL UNION

Авторы

  • Schneider L. (Department of Geography, Johannes Gutenberg University)
  • Esper J. (Department of Geography, Johannes Gutenberg University)
  • Smerdon J.E. (Lamont-Doherty Earth Observatory, Columbia University)
  • Wilson R.J.S. (School of Geography and Geosciences, University of St Andrews)
  • Buntgen U. (Swiss Federal Research Institute WSL)
  • Myglan V.S. (Institute for the Humanities, Siberian Federal University)
  • Kirdyanov A.V. (V.N. Sukachev Institute of Forest SB RAS)

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