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A 106 year monthly coral record reveals that the East Asian summer monsoon modulates winter PDO variability

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Title: A 106 year monthly coral record reveals that the East Asian summer monsoon modulates winter PDO variability
Authors: Watanabe, Tsuyoshi Browse this author →KAKEN DB
Kawamura, Takashi Browse this author
Yamazaki, Atsuko Browse this author
Murayama, Masafumi Browse this author
Yamano, Hiroya Browse this author
Keywords: PDO
Asian monsoon
oxygen isotopes
Issue Date: 28-May-2014
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 41
Issue: 10
Start Page: 3609
End Page: 3614
Publisher DOI: 10.1002/2014GL060037
Abstract: The Pacific Decadal Oscillation (PDO) is a dominant climate mode in the Pacific Ocean and thought to be related to seasonal to decadal changes in sea surface conditions. Colonies of long-living Porites coral, widely used to reconstruct monthly to century-scale tropical sea surface temperature and sea surface salinity records, were discovered near Koshiki Island, Japan (31 degrees N, 129 degrees E). A monthly resolved, 106 year 18O record revealed that distinct decadal-scale variability was significantly correlated with the PDO index. Our comparison showed 1 to 3 years lead-lag correlation of summer coral 18O with the winter PDO index, suggesting that the East Asian summer monsoon (EASM) may act as the driving force of winter PDO variability over the last 100 years. Cross-spectral analysis between the winter PDO index and summer coral 18O suggested that recent and future global warming may lead to a more frequent and/or stronger teleconnection between EASM and PDO.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡邊 剛

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