Citation:

94JC01882

Name: Temperatures, salinity, and stable oxygen isotope values of bottom water and of the mollusc shell Arctica islandica from Nantucket Shoals
Published: 1994
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The carbonate shell of the bivalve Arctica islandica has been recognized, for more than a decade, as a potentially important marine geochemical biorecorder owing to this species' great longevity (200+ years) and wide geographic distribution throughout the northern North Atlantic Ocean, a region vital to global climate and ocean circulation. However, until now this potential has not been realized owing to the difficulty of precisely sampling the shell of this slow growing species. Using newly available automated microsampling techniques combined with micromass stable isotope mass spectrometry, a stable oxygen isotope record (1956-1957 and 1961-1970) has been obtained from a live-captured, 38-year-old A. islandica specimen collected near the former position of the Nantucket Shoals Lightship (41°N. 69°W). The shell's delta18O signal is compared with an expected signal derived from ambient bottom temperature and salinity data recorded at the lightship for the same period. The results show that A islandica's delta18O record (1) is in phase with its growth banding, confirming the annual periodicity of this species' growth bands, (2) is in oxygen isotopic equilibrium with the ambient seawater, (3) shows a consistent shell growth shutdown temperature of ~6°C. which translates into an ~8-month (May–December) shell growth period at this location, and (4) records the ambient bottom temperature with a precision of ~ +/-1.2°C. These results add important information on the life history of this commercially important shellfish species and demonstrate that A. islandica shells can be used to reconstruct inter- and intra-annual records of the continental shelf bottom temperature.

Coverage:

Latitude: 41.285000 * Longitude: -70.096700

Date/Time Start: 1965-01-01T00:00:00 * Date/Time End: 2001-12-31T00:00:00

Event(s):

Nantucket * Latitude: 41.285000 * Longitude: -70.096700 * Date/Time Start: 1965-01-01T00:00:00 * Date/Time End: 2001-12-31T00:00:00 * Campaign: * Method/Device: (TGS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	AGE	Age	ka BP			Geocode
2	Age	Age	a AD/CE	Weidman, Christopher R	Counting	counting growth bands in thin sections (100 µm)
3	Salinity	Sal		Weidman, Christopher R	Measured	at Nantucket Shoals Lightship
4	Temperature, water	Temp	°C	Weidman, Christopher R	Measured	at Nantucket Shoals Lightship
5	Arctica islandica, δ18O	A. islandica δ18O	‰ PDB	Weidman, Christopher R	Isotope ratio mass spectrometry
6	δ18O, water	δ18O H2O	‰ SMOW	Weidman, Christopher R	Calculated	estimated monthly d18O-water based on salinity and Fairbanks (1982) relationship

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

505 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Age [ka BP]	2 Age [a AD/CE]	3 Sal	4 Temp [°C]	5 A. islandica δ18O [‰ PDB]	6 δ18O H2O [‰ SMOW]
-0.02196	1971.96	32.67	9.4
-0.02188	1971.88	33.08	13.7
-0.02179	1971.79	33.87	13.7
-0.02171	1971.71	32.57	11.2
-0.02162	1971.62	32.39	9.0
-0.02154	1971.54	32.26	8.8
-0.02146	1971.46	32.24	7.1
-0.02138	1971.38	32.23	6.1
-0.02129	1971.29	32.25	4.4
-0.02121	1971.21	32.23	0.4
-0.02112	1971.12	32.37	3.5
-0.02104	1971.04	32.47	5.9
-0.02096	1970.96	32.44	8.9
-0.02088	1970.88	32.35	11.8
-0.02079	1970.79	32.45	12.2
-0.02071	1970.71	32.34	9.7
-0.02062	1970.62	32.30	9.0
-0.02054	1970.54	32.33	7.9
-0.02046	1970.46	32.51	7.7
-0.02038	1970.38	32.43	6.3
-0.02029	1970.29	32.41	4.7
-0.02021	1970.21	32.03	4.0
-0.02012	1970.12	32.50	4.3
-0.02004	1970.04	32.53	5.0
-0.01996	1969.96	32.48	8.4
-0.01988	1969.88	32.51	12.3
-0.01979	1969.79	32.98	13.5
-0.01971	1969.71	32.77	11.1
-0.01962	1969.62	33.19	10.6
-0.01954	1969.54	32.74	9.0
-0.01946	1969.46	32.91	8.0
-0.01938	1969.38	32.89	6.3
-0.01929	1969.29	32.96	5.5
-0.01921	1969.21	33.12	4.3
-0.01912	1969.12	33.10	4.1
-0.01904	1969.04	32.88	5.2
-0.01896	1968.96	32.78	6.9	2.25	-0.86
-0.01888	1968.88	32.78	11.1	1.66	-0.86
-0.01875	1968.75	32.78	11.7	1.11	-0.86
-0.01862	1968.62	32.87	8.5	1.47	-0.82
-0.01854	1968.54	32.76	8.3	1.78	-0.87
-0.01846	1968.46	32.48	8.0	2.05	-0.99
-0.01838	1968.38	32.61	5.3	2.18	-0.93
-0.01796	1967.96	32.37	7.2	1.72	-1.03
-0.01788	1967.88	32.46	10.4	1.19	-0.99
-0.01775	1967.75	32.84	11.0	1.45	-0.83
-0.01762	1967.62	32.53	7.7	1.88	-0.96
-0.01754	1967.54	32.30	7.8	1.97	-1.06
-0.01746	1967.46	32.46	6.2	2.16	-0.99
-0.01738	1967.38	32.57	4.5	2.21	-0.95
-0.01696	1966.96	32.38	8.3	1.90	-1.03
-0.01688	1966.88	32.32	9.8	1.45	-1.05
-0.01675	1966.75	32.56	9.9	1.53	-0.95
-0.01662	1966.62	32.56	9.5	1.84	-0.95
-0.01654	1966.54	32.67	8.3	1.97	-0.91
-0.01646	1966.46	32.45	6.2	2.20	-1.00
-0.01638	1966.38	32.59	5.4	2.14	-0.94
-0.01596	1965.96	32.41	6.9	2.19	-1.02
-0.01588	1965.88	32.60	10.0	1.43	-0.94
-0.01579	1965.79	32.60	10.5	1.36	-0.94
-0.01571	1965.71	32.57	8.8	1.58	-0.95
-0.01562	1965.62	32.58	10.2	2.04	-0.94
-0.01554	1965.54	32.42	8.7	2.23	-1.01
-0.01546	1965.46	32.42	6.3	2.53	-1.01
-0.01538	1965.38	32.47	4.5	2.45	-0.99
-0.01496	1964.96	32.55	6.5	2.05	-0.96
-0.01488	1964.88	32.31	10.2	1.28	-1.06
-0.01479	1964.79	32.30	10.9	1.35	-1.06
-0.01471	1964.71	32.43	11.3	1.37	-1.01
-0.01462	1964.62	32.55	11.5	1.63	-0.96
-0.01454	1964.54	32.52	9.9	1.67	-0.97
-0.01446	1964.46	32.47	8.0	1.99	-0.99
-0.01438	1964.38	32.69	6.1	2.22	-0.90
-0.01396	1963.96	32.73	6.3	2.08	-0.88
-0.01388	1963.88	32.65	10.5	1.21	-0.91
-0.01379	1963.79	33.50	13.1	1.11	-0.56
-0.01371	1963.71	32.88	11.9	1.32	-0.82
-0.01362	1963.62	32.82	10.2	1.27	-0.84
-0.01354	1963.54	32.79	10.7	1.63	-0.86
-0.01346	1963.46	32.55	8.6	1.89	-0.96
-0.01338	1963.38	32.66	6.8	1.92	-0.91
-0.01296	1962.96	32.47	6.1	1.96	-0.99
-0.01288	1962.88	32.42	10.2	1.58	-1.01
-0.01279	1962.79	31.99	12.0	0.94	-1.19
-0.01271	1962.71	32.33	9.4	1.19	-1.05
-0.01262	1962.62	32.59	9.8	1.50	-0.94
-0.01254	1962.54	32.49	10.0	1.86	-0.98
-0.01246	1962.46	32.48	8.4	2.23	-0.99
-0.01238	1962.38	32.58	6.8	2.34	-0.94
-0.01196	1961.96	32.55	7.6	2.12	-0.96
-0.01188	1961.88	32.41	9.9	1.22	-1.02
-0.01179	1961.79	33.67	14.3	0.91	-0.48
-0.01171	1961.71	32.86	11.6	0.93	-0.83
-0.01162	1961.62	32.49	11.0	1.00	-0.98
-0.01154	1961.54	32.61	10.7	1.43	-0.93
-0.01146	1961.46	32.69	8.0	1.67	-0.90
-0.01138	1961.38	32.52	5.6	2.16	-0.97
-0.00796	1957.96	33.37	11.1	1.62	-0.61
-0.00788	1957.88	33.49	14.6	0.76	-0.56
-0.00779	1957.79	33.03	13.6	0.94	-0.75
-0.00771	1957.71	33.15	11.0	1.08	-0.70
-0.00762	1957.62	33.47	10.6	1.48	-0.57
-0.00754	1957.54	33.51	9.5	1.72	-0.55
-0.00746	1957.46	33.60	9.1	2.00	-0.51
-0.00738	1957.38	33.69	8.6	2.23	-0.48
-0.00696	1956.96	33.74	9.6	1.92	-0.46
-0.00688	1956.88	34.56	15.5	0.88	-0.11
-0.00679	1956.79	34.46	15.5	0.82	-0.15
-0.00671	1956.71	32.97	12.5	1.02	-0.78
-0.00662	1956.62	32.54	10.0	1.25	-0.96
-0.00654	1956.54	32.57	9.1	1.75	-0.95
-0.00646	1956.46	32.64	8.0	2.08	-0.92
-0.00638	1956.38	32.76	6.6	2.15	-0.87
-0.00629	1956.29	32.75	4.7
-0.00621	1956.21	33.01	3.9
-0.00612	1956.12	32.88	4.5
-0.00604	1956.04	32.85	5.5