Tree-ring reconstructed temperature index for coastal northern Japan: Implications for western North Pacific variability

Rosanne D'Arrigo, Rob Wilson, Greg Wiles, Kevin Anchukaitis, Olga Solomina, Nicole Davi, Clara Deser, Ekaterina Dolgova

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

While paleoclimatic studies have extended our understanding of North Pacific climate variability, these have been almost exclusively based on proxies from western North America. We present a tree-ring reconstruction of June to September coastal air temperatures for Nemuro, northeastern Japan for the past four centuries. It explains 36% of the variance in instrumental temperatures and correlates significantly with indices of the atmosphere-ocean circulation. Spectral analyses reveal robust bidecadal peaks that appear associated with regional modes of western North Pacific variability. At decadal time scales, Nemuro temperatures appear to be influenced by the confluence of the Kuroshio and Oyashio currents, a primary centre of action driving Pacific Decadal Variability. Regime shifts (e.g. 1976) are weakly expressed relative to western North America. These aspects of western North Pacific climate are regionally distinct relative to those elsewhere in the basin, with greater complexity than can be attributed to the Pacific Decadal Oscillation (PDO) alone.

Original languageEnglish (US)
Pages (from-to)3713-3720
Number of pages8
JournalInternational Journal of Climatology
Volume35
Issue number12
DOIs
StatePublished - Oct 2015
Externally publishedYes

Keywords

  • Dendrochronology
  • Japan
  • Temperature reconstruction
  • Tree rings
  • Western North Pacific

ASJC Scopus subject areas

  • Atmospheric Science

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