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Centennial‐scale winter monsoon variability in the northern East China Sea during the Holocene
Author(s) -
Nakanishi Takahiro,
Yamamoto Masanobu,
Tada Ryuji,
Oda Hirokuni
Publication year - 2012
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/jqs.2589
Subject(s) - holocene , centennial , monsoon , east asian monsoon , climatology , sea surface temperature , oceanography , temperature record , geology , east asia , china , geography , archaeology
The East China Sea (ECS) responds to changes in the strength of the Kuroshio and East Asian monsoon activity. Multidecadal resolution records of the palaeotemperature indices ${\rm TEX}_{{\rm 86}}^{{\rm H}} $ and $U_{37}^{K'} $ from core KY07‐04 PC‐1 show that the hydrology of the ECS responded to variability in the East Asian winter monsoon. Unlike Mg/Ca‐derived sea surface temperatures, which show neither warming nor cooling trends during the Holocene, the ${\rm TEX}_{{\rm 86}}^{{\rm H}} $ record showed a general warming trend at a rate of 0.2°C ka −1 . This warming was attributable to shrinkage of the Yellow Sea Central Cold Water and/or weaker winter cooling of the surface water. The ${\rm TEX}_{{\rm 86}}^{{\rm H}} $ record indicated a centennial‐scale variability with an ∼1°C amplitude superimposed on the warming trend that reflected changes in the East Asian winter monsoon and/or the Kuroshio. Temperature minima appeared at ca. 3.0, 4.7, 6.2, 7.9 and 9.0 ka, and spectral analysis of the last 7 ka revealed significant peaks with periodicities of approximately 210, 250, and 440 years that were close to those observed in solar radiation. The reconstructed winter monsoon variability is consistent with Chinese documentary records for the last two millennia. Copyright © 2012 John Wiley & Sons, Ltd.