Radiocarbon reservoir effect from shell and plant pairs in Holocene sediments around the Yeongsan River in Korea

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

“…The chronological increasing trend of the MRE from 250 ± 60 to 390 ± 60 yr was identified during 7400-9200 cal BP. Similar trend was also recognized in two cores of Hakata Bay during 7500-9000 cal BP (Nakanishi et al 2017a) and four cores of the west and south coast of Korea during 3000-4000, 6500-7000, and 7500-8000 cal BP (YAR-4 core; Nakanishi et al 2013, S13, S15 and W17 cores; Nakanishi et al 2015a). These changes would be related to the increased marine water influence induced by rising sea levels in this region.…”

“…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).…”

Calibration curve from AD 1250 to AD 1650 by measurements of tree-rings grown on the Korean peninsula

“…Because the circumstances of growing location would affect the isotopic composition of a given sample, analysis was limited to the detailed correlation of the 14 C concentration and regional conditions. Trees grown near coastal areas of Korean Peninsula would have different isotopic composition from those grown in inland areas because of regional marine reservoir effect of Korea [18]. Unfortunately, a live tree older than one thousand years is quite rare in this country.…”