Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages

Progress in Earth and Planetary Science

Table 1 Age control points of Core KY07-04 PC01 by radiocarbon ages of planktic foraminifera and K-Ah tephra chronology

Core depth (cm)	¹⁴C age (yr BP)	Error (yr)	Calendar age (yr BP)	Error (yr, ± 2σ)	Foraminiferal species
2.5–12.5	185	75	Bomb ¹⁴C	Bomb ¹⁴C	N.dutertrei
2.5–12.5	265	115	Bomb ¹⁴C	Bomb ¹⁴C	G.bulloides
50–60	1040	50	670	226	N.dutertrei
78–79.75	1643	49	1236	266	G. sacculifer, P. obliquiloculata, N. dutertrei
98.5–103.5	2955	80	2793	357	N.dutertrei
102.25–104.75	2429	53	2142	320	G. sacculifer, P. obliquiloculata, N. dutertrei
124.75–127.25	2812	48	2610	293	G. sacculifer, P. obliquiloculata, N. dutertrei
151–156	2955	50	2796	321	N.dutertrei
173.5–176	3331	37	3239	299	N. dutertrei
201–206	3635	50	3637	309	N.dutertrei
223.5–226	4147	89	4292	391	G. sacculifer, P. obliquiloculata, N. dutertrei
251–256	4550	80	4822	376	N.dutertrei
273.5–276	4985	53	5313	304	G. sacculifer, P. obliquiloculata, N. dutertrei
300–302.5	5325	55	5716	279	N.dutertrei
322.5–325	5878	44	6304	285	G. sacculifer, P. obliquiloculata, N. dutertrei
365–367.5	6688	65	7180	280	G. sacculifer, N. dutertrei
409			7252	56	K-Ah tephra top
489			7252	56	K-Ah tephra bottom
492–494.5	6960	60	7452	251	N.dutertrei
492–502	7000	90	7502	286	G.bulloides
639.5–642	9040	75	9841	338	N.dutertrei
781–783.5	10,475	145	11,856	559	N.dutertrei
925.5–935.5	11,500	70	13,016	270	N.dutertrei
925.5–935.5	11,700	80	13,214	300	G.bulloides
1068.5–1071	13,250	105	15,371	428	N.dutertrei
1240–1247.5	14,740	80	17,295	398	N.dutertrei
1403.5–1408.5	15,745	105	18,434	344	N.dutertrei
1398.5–1408.5	15,975	105	18,637	378	G.bulloides