An intensified East Asian winter monsoon in the Japan Sea between 7.9 and 6.6 Ma

Kenji M. Matsuzaki, Noritoshi Suzuki, Ryuji Tada

研究成果: Article査読

6 被引用数 (Scopus)

抄録

The Japan Sea was a semi-closed marginal sea mainly connected to the subarctic northwestern Pacific via shallow seaways during the late Miocene. We use a multiple regression analysis with common extant radiolarian species groups to estimate the sea-surface temperature (SST) for the period between 9.1 and 5.3 Ma. Our results show a cooling of 8 °C between 7.9 and 6.6 Ma, when the SST dropped from 24 °C to 16 °C. We infer that this cooling dominantly reflects wintertime cooling related to an intensified East Asian winter monsoon. On the other hand, cooling of the summertime SST occurred from 6.6 to 5.8 Ma, suggesting that the late Miocene global cooling is composed of a wintertime cooling phase from 7.9 to 6.6 Ma and summertime cooling phase from 6.6 to 5.8 Ma.

本文言語English
ページ(範囲)919-923
ページ数5
ジャーナルGeology
48
9
DOI
出版ステータスPublished - 2020 9 1

ASJC Scopus subject areas

  • 地質学

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