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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Geoscience Letters Cover Image

Table 1 Correlation coefficients between tree-ring δ18O and two indices (NPGO and PDO)

From: Relationship between the Northern Pacific Gyre Oscillation and tree-ring cellulose oxygen isotopes in northeastern Japan

Correlation MJ JA SO ND +JF +MA +MJ
NPGO 0.20 0.23 0.18 0.15 0.28* 0.23 0.26*
PDO − 0.12 − 0.06 − 0.10 − 0.10 0.01 0.01 − 0.03
  1. * 0.05 significant level
  2. + means the following year, and analysis period is from A.D. 1950 to 2010