Offsets in radiocarbon ages between plants and shells from same horizons of coastal sediments in Korea

Radiocarbon age offsets of Plants and Shells in Holocene sediments from the Sukumo plain, Southwest Coast of Shikoku, Southwest Japan

“…It might reflect the variations of reservoir age affected by different branches of the Kuroshio Current. Similar differences were recognized when the average reservoir values from southwestern Japan were slightly smaller than the values from the Korean Peninsula, 380 ± 190 yr (n = 48), from 60 ± 60 to 1000 ± 60 yr, as determined from seven sediment cores from the western and southern coast dating to 100-8200 cal BP (YAR-4 in Figure 3; Nakanishi et al 2013Nakanishi et al , 2015; and 450 ± 230 yr (n = 9), from 120 ± 80 to 800 ± 70 yr, as determined from a core from the east coast dating to 300-7300 cal BP (PMR-2 in Figure 3; Nakanishi et al 2017b). They might reflect the variations of reservoir age between the Kuroshio Current and the Tsushima Current and/or the Liman Current.…”

“…The proportion of core recovery is almost 94%. Nakanishi et al 2015). Data from The Marine Reservoir Database.…”

“…Data from The Marine Reservoir Database. 1, Kuroshio Current; 2, Tsushima Current; 3, Oyashio Current; 4, Liman Current; a, YAR-4 from Nakanishi et al (2013); b, study sites from Nakanishi et al (2015); c, HKA and HIUB from Nakanishi et al (2017a); d, PMR-2 from Nakanishi et al (2017b); e, KUO-1 from Nakanishi et al (2017c). f, study sites from Hirabayashi et al (2017).…”

“…Radiocarbon ( 14 C) marine reservoir effects (MRE) have been determined from Holocene coastal sediments in the East Asia region (Yu et al 2010;Nakanishi et al 2013Nakanishi et al , 2015Nakanishi et al , 2017aNakanishi et al , 2017bNakanishi et al , 2017cNakamura et al 2016;Yang et al 2018). The reservoir ages ranged from 60 to…”

“…To identify the direct chronological changes of the MRE under the Kuroshio Current, 14 C ages from pairs of marine mollusks and terrestrial plants were measured from the same stratigraphic horizons within a single core of Holocene sediments beneath the Sukumo Plain, in the southwestern portion of Shikoku Island. Subsequently, the results were compared with values from the Oita Plain, 310 ± 130 yr (n = 7), and Hakata Bay, 310 ± 150 yr (n = 33), on the northern coast of Kyushu (Nakanishi et al 2017a(Nakanishi et al , 2017c, as well as the Korean Peninsula (Nakanishi et al 2013(Nakanishi et al , 2015380 ± 190 yr [n = 48], 2017b; 450 ± 230 yr [n = 9]), the South China Sea (Yu et al 2010), and Taiwan (Yang et al 2018).…”