Temporal Variation in Iron Flux Deposition onto the Northern North Pacific Reconstructed from an Ice Core Drilled at Mount Wrangell, Alaska

• Sasaki Hirotaka

  Graduate School of Environmental Science, Hokkaido University Institute of Low Temperature Science, Hokkaido University

• Matoba Sumito

  Institute of Low Temperature Science, Hokkaido University

• Shiraiwa Takayuki

  Institute of Low Temperature Science, Hokkaido University

• Benson Carl S.

  Geophysical Institute, University of Alaska Fairbanks

抄録

To quantify the atmospheric iron deposition on the northern North Pacific region, we measured concentrations of iron in ice cores drilled at Mount Wrangell, Alaska, in 2003 and 2004. The iron concentration profile from 1981 to 2003 showed seasonal peaks each spring. This variation was similar to the seasonal variation in the concentration of mineral dust in the atmosphere in the North Pacific region. The annual iron fluxes calculated from the ice core records ranged from 3.2 to 27.0 mg m⁻² yr⁻¹, and the temporal variation in the iron flux was significantly correlated with the frequency of severe dust storms occurrence on the East Asian continent (r = 0.65, p < 0.05) and the total number of Kosa days observed in Japan (r = 0.64-0.66, p < 0.05), but not with the precipitation amount in Alaska. We concluded that the amount of iron deposition onto the northern North Pacific is controlled mainly by the emission of dust from the east Asian continent and not by scavenging processes in Alaska.

収録刊行物

• SOLA

  SOLA 12 (0), 287-290, 2016

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390282680198022784
• NII論文ID: 120006220022
• NII論文ID: 130005282085
• DOI: 10.2151/sola.2016-056
• ISSN: 13496476
• HANDLE: 2115/65225
• Web Site: https://www.jstage.jst.go.jp/article/sola/12/0/12_2016-056/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可