Long-term variability of surface nutrient concentrations in the North Pacific

S. Yasunaka, T. Ono, Y. Nojiri, F. A. Whitney, C. Wada, A. Murata, S. Nakaoka, S. Hosoda

研究成果: Article査読

14 被引用数 (Scopus)

抄録

We present the spatial distributions and temporal changes of the long-term variability of surface nutrient concentrations in the North Pacific by using nutrient samples collected by volunteer ships and research vessels from 1961 to 2012. Nutrient samples are optimally interpolated onto 1° × 1° monthly grid boxes. When the Pacific Decadal Oscillation is in its positive phase, nutrient concentrations in the western North Pacific are significantly higher than the climatological means, and those in the eastern North Pacific are significantly lower. When the North Pacific Gyre Oscillation is in its positive phase, nutrient concentrations in the subarctic are significantly higher than the climatological means. The trends of phosphate and silicate averaged over the North Pacific are -0.012 ± 0.005 μmol l-1 decade-1 and -0.38 ± 0.13 μmol l-1 decade-1, whereas the nitrate trend is not significant (0.01 ± 0.13 μmol l-1 decade-1).

本文言語English
ページ(範囲)3389-3397
ページ数9
ジャーナルGeophysical Research Letters
43
7
DOI
出版ステータスPublished - 2016 4月 16
外部発表はい

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

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