ORCID Profile
0000-0002-6120-9110
Current Organisation
University of Tokyo
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Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 09-2019
Publisher: American Geophysical Union (AGU)
Date: 04-2017
DOI: 10.1002/2017GC006854
Publisher: Elsevier BV
Date: 12-2022
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 12-2022
Publisher: Springer Science and Business Media LLC
Date: 10-08-2017
Publisher: Cambridge University Press (CUP)
Date: 27-11-2019
DOI: 10.1017/RDC.2019.145
Abstract: The trajectory of the Kuroshio, the western boundary current in the north Pacific, influences regional climate. It intrudes into the South China Sea (SCS) through the Luzon Strait, resulting in the exchange of water, nutrients, heat, and salt between the Pacific and SCS. It has been reported that the trajectory of the Kuroshio has varied with decadal climate changes. However, there has been no report of an observation-based estimate of the variation in the Luzon Strait transport. Here, a 50-year, high-resolution coral skeletal radiocarbon (Δ 14 C) dataset from 1946 to 1994 is reported from Currimao, northwest of Luzon Island. Δ 14 C has been used as a sensitive tracer of seawater, and our data indicates a significant increase in Δ 14 C from 1946 to 1994 related to atmospheric nuclear bomb testing, with more rapid increase in the SCS than in the Pacific. The unusual, rapid Δ 14 C increase in the 1950s found in our SCS corals together with seasonal variation in Δ 14 C will helps constrain physical oceanographic models for the western Pacific, including the SCS.
No related grants have been discovered for Shoko Hirabayashi.