δ 18Osw estimate for Globigerinoides ruber from core-top sediments in the East China Sea

Horikawa, Keiji; Kodaira, Tomohiro; Zhang, Jing; Murayama, Masafumi

doi:10.1186/s40645-015-0048-3

Progress in Earth and Planetary Science

Table 2 Details of the core-top sediments and metal/Ca and δ ¹⁸O values from Globigerinoides ruber (sensu stricto)

From: δ ¹⁸O_sw estimate for Globigerinoides ruber from core-top sediments in the East China Sea

												No dissolution-corrected Mg/Ca-derived SST			Dissolution-corrected Mg/Ca-derived SST
Core site	Latitude	Longitude	Water depth (m)	δ ¹⁸O (VPDB ‰)		Mg/Ca (mmol mol⁻¹)	±SD	Ba/Ca (μmol mol⁻¹)	±SD	Mn/Ca (μmol mol⁻¹)	±SD	SST^a (°C)	SST^b (°C)	SST^c (°C)	SST^a (°C)	Δ[CO₃ ²⁻] (μmol kg⁻¹)	Corrected Mg/Ca (mmol mol⁻¹)	Calcification SST	Shell-derived δ ¹⁸O_sw (VSMOW ‰)	Calcification salinity	Calcification season	Calcification depth (m)
KH13-4-HR2MC	27° 40.79′ N	127° 23.95′ E	1675	−2.93	Ave	4.09	0.18	0.72	0.74	7.88	5.5	26.7	24.4	29.4	28.7	−2.3	4.90	28.5	0.22	34.43	July–Sept	0–10
					Run #1	4.05		0.66		0.74
					Run #2	3.94		0.78		6.50
					Run #3	4.03		1.53		11.58
					Run #4	4.35		2.25		12.71
KT12-25-St.1	27° 58′ N	127° 16′ E	1153	−2.52	Ave.	4.20	0.03	0.77	0.01	23.25	21.3	27.0	24.6	29.7	28.0	5.9	4.60	26.6	0.27	34.50	May–Oct	0–30
					Run #1	4.22		0.78		8.18
					Run #2	4.18		0.77		38.31
KH13-4-HR6MC	29° 17.35′ N	128° 25.18′ E	1065	−2.47	Ave.	3.97	0.25	0.79	0.20	4.37	4.4	26.4	24.1	29.0	27.3	7.3	4.30	26.3	0.19	34.41	May–Oct	0–30
					Run #1	3.68		1.04		1.92
					Run #2	4.13		0.66		9.49
					Run #3	4.09		0.92		1.72
KH13-4-HR9MC	30° 28.19′ N	129° 31.06′ E	709	−2.78	Ave.	4.19	0.25	0.81	1.09	53.01	13.7	27.0	24.6	29.6	27.1	12.9	4.24	27.3	0.01	34.01	June–Sept	0–30
					Run #1	3.91		0.81		48.40
					Run #2	4.36		1.11		68.44
					Run #3	4.30		2.82		42.18
KH13-4-MT5MC	30° 31.23′ N	128° 23.38′ E	823	−2.27	Ave.	3.61	0.22	0.88	0.11	44.50	7.7	25.3	23.2	27.9	25.7	11.1	3.75	25.1	0.17	34.17	May–Oct	0–30
					Run #1	3.41		0.72		51.73
					Run #2	3.44		0.95		46.37
					Run #3	3.68		0.97		46.21
					Run #4	3.89		0.87		33.67
KH13-4-HR11MC	31° 40.57′ N	129° 01.99′ E	725	−2.42	Ave.	3.30	0.02	0.85	0.06	44.86	37.0	24.3	22.3	26.9	24.5	12.7	3.37	25.3	−0.20	33.76	June–Sept	0–30
					Run #1	3.31		0.89		18.67
					Run #2	3.29		0.80		71.05
A7	27° 49.2′ N	126° 58.7′ E	1264	−2.35		4.06						26.6	24.3	29.3	27.9	4.2	4.55	25.9	0.37	34.54	May–Oct	0–30
MD012403	25° 17′ N	123° 10′ E	1420	−2.51		4.40						27.5	25.1	30.2	29.0	1.7	5.01	26.5	0.39	34.43	May and Oct	0–30
MD012404	26° 38.84′ N	125° 48.75′ E	1397	−2.60		4.24						27.1	24.7	29.8	28.6	2.1	4.84	26.9	0.21	34.38	May–Oct	0–30
KY07-04-01	31° 38.35′ N	128° 56.64′ E	725	−2.50		3.50						24.9	22.9	27.6	25.2	12.7	3.57	25.6	−0.14	33.68	June–Sept	0–20

Decreases in Mg/Ca ratios due to calcite dissolution were calculated using critical thresholds for the dissolution (14 μmol kg⁻¹ Δ[CO₃ ²⁻]) and sensitivity of Mg/Ca ratio to Δ[CO₃ ²⁻] (0.05 mmol mol⁻¹ per μmol⁻¹ kg⁻¹) (Johnstone et al. 2011). Core-top Mg/Ca and δ ¹⁸O data from A7, MD012403, MD012404, KY07-04-01 were from Sun et al. (2005), Lin et al. (2006), Chen et al. (2010), and Kubota et al. (2010), respectively
^aSST = ln(Mg/Ca/0.38)/0.089, Hastings et al. (2001)
^bSST = ln(Mg/Ca/0.34)/0.102, Anand et al. (2003)
^cSST = ln(Mg/Ca/0.3)/0.089, Lea et al. (2000)

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