Reconstruction of millennial-scale variations in the East Asian summer monsoon over the past 300 ka based on the total carbon content of sediment from Lake Biwa, Japan

Naoya Iwamoto*, Yoshio Inouchi

*この研究の対応する著者

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The total carbon content analysis for Takashima-oki core extracted from Lake Biwa with time resolutions of approximately 150 years was used to reconstruct millennial-scale climate change in the East Asian monsoon region over the past 300 ka. The total carbon content of the Takashima-oki core is an indirect proxy for the East Asian summer monsoon, because the total carbon content reflects primary productivity within the lake, which is controlled by precipitation in the catchment area. Using these data, we clarify temporal variations in the East Asian summer monsoon prior to MIS 5, which were previously unresolved. The observed variations show a ∼1,500-year cycle that is also recorded by paleoclimate indices in the North Atlantic region. We propose that the East Asian summer monsoon underwent abrupt millennium-scale changes during interglacial stages such as MIS 5 and 7.

本文言語English
ページ(範囲)1607-1616
ページ数10
ジャーナルEnvironmental Geology
52
8
DOI
出版ステータスPublished - 2007 8月
外部発表はい

ASJC Scopus subject areas

  • 地球惑星科学(その他)
  • 環境科学(全般)
  • 環境化学
  • 水の科学と技術

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