Citation:

PANGAEA.956808

Name: Seawater oxygen isotope data in the western Pacific Ocean analysed on samples from the R/V Hakuho-Maru KH-14-6 (GEOTRACES, GP19) cruise in 2014-2015
Published: 2023-03-24
License: https://creativecommons.org/licenses/by/4.0/
Keywords: GEOSECS; GEOTRACES; oxygen isotopes; salinity–d18Osw relationship; seawater; Western Pacific

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Abstract:

This study presents a new set of paired d18Osw and salinity data (n = 83) from a large region of the western Pacific (mainly the western south Pacific) collected during the 2014–2015 El Niño period. We determined regional salinity–d18Osw relationships for three ocean regions (40º–20ºN, 20ºN–30ºS, and 30º–66ºS) and found that all three regions exhibited highly linear relationships between d18Osw and salinity. The 40º–20ºN and 20ºN–30ºS regions had relatively low slopes (0.33 and 0.37 ‰ psu-1, respectively), while the 30º–66ºS region had a relatively high slope (0.54 ‰ psu-1). Each regional regression was statistically different from those of the GEOSECS (1973–1974 La Niña) data, indicating that inter-annual ENSO variability has an impact on salinity–d18Osw relationships over a wide area of the western Pacific.

Keyword(s):

GEOSECS; GEOTRACES; oxygen isotopes; salinity–d18Osw relationship; seawater; Western Pacific

Related to:

Horikawa, Keiji; Kodaira, Tomohiro; Zhang, Jing; Obata, Hajime (2023): Salinity–oxygen isotope relationship during an El Niño (2014–2015) in the southwestern Pacific and comparisons with GEOSECS data (La Niña, 1973–1974). Marine Chemistry, 249, 104222, https://doi.org/10.1016/j.marchem.2023.104222

Project(s):

Global marine biogeochemical cycles of trace elements and their isotopes (GEOTRACES)

Funding:

Japan Society for the Promotion of Science (JSPS), grant/award no. 17H01853 : Impact of deglacial melt of the Cordillera Ice Sheet on the Gulf of Alaska coastal environment: geochemical and molecular biological analyses of marine sediments

Japan Society for the Promotion of Science (JSPS), grant/award no. 23253001 : GEOTRACES program in the Pacific Ocean: studies on the 3-dimensional distribution and behavior of trace elements and isotopes

Coverage:

Median Latitude: -13.090596 * Median Longitude: 173.044064 * South-bound Latitude: -65.726833 * West-bound Longitude: 139.683833 * North-bound Latitude: 34.925667 * East-bound Longitude: -169.313500

Date/Time Start: 2014-12-04T00:00:00 * Date/Time End: 2015-02-24T00:00:00

Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 5 m

Event(s):

KH14-6_SSW001 * Latitude: 34.925700 * Longitude: 139.683800 * Date/Time: 2014-12-04T00:00:00 * Campaign: (GP19) * Basis: Hakuho-Maru * Method/Device: Surface water sample (SWS)

KH14-6_SSW002 * Latitude: 34.249000 * Longitude: 141.396000 * Date/Time: 2014-12-04T00:00:00 * Campaign: (GP19) * Basis: Hakuho-Maru * Method/Device: Surface water sample (SWS)

KH14-6_SSW003 * Latitude: 33.480000 * Longitude: 143.458300 * Date/Time: 2014-12-04T00:00:00 * Campaign: (GP19) * Basis: Hakuho-Maru * Method/Device: Surface water sample (SWS)

Comment:

Oxygen isotopes were measured at University of Toyama. Temperature and salinity were obtained by a thermosalinograph. The salinity data were corrected by an onboard Autosal salinometer (Model 8400B, Guildline Instruments Ltd.). See paper for more information.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Horikawa, Keiji
2	DATE/TIME	Date/Time		Horikawa, Keiji		Geocode
3	LATITUDE	Latitude		Horikawa, Keiji		Geocode
4	LONGITUDE	Longitude		Horikawa, Keiji		Geocode
5	DEPTH, water	Depth water	m	Horikawa, Keiji		Geocode
6	δ18O, water	δ18O H2O	‰ SMOW	Horikawa, Keiji	Isotope ratio mass spectrometer (IRMS)	vs VSMOW
7	δ18O, water, standard error	δ18O H2O std e	±	Horikawa, Keiji	Isotope ratio mass spectrometer (IRMS)
8	Method comment	Method comm		Horikawa, Keiji		d18O analysis technique
9	Temperature, water	Temp	°C	Horikawa, Keiji	Thermosalinograph (TSG)
10	Salinity	Sal		Horikawa, Keiji	Thermosalinograph (TSG)	PSU
11	Salinity, standard error	Sal std e	±	Horikawa, Keiji	Thermosalinograph (TSG)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)

Size:

498 data points

Data

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

1 Event	2 Date/Time	3 Latitude	4 Longitude	5 Depth water [m]	6 δ18O H2O [‰ SMOW]	7 δ18O H2O std e [±]	8 Method comm	9 Temp [°C]	10 Sal	11 Sal std e [±]
KH14-6_SSW014	2014-12-09	22.4878	164.9917	5	0.67200	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	26.5	35.39133	0.04
KH14-6_SSW013	2014-12-07	23.9058	162.7105	5	0.56137	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	24.3	35.14633	0.04
KH14-6_SSW085	2015-02-23	24.9400	143.1523	5	0.46612	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	21.2	35.00333	0.04
KH14-6_SSW012	2014-12-07	24.9722	160.9592	5	0.53891	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	24.2	35.11733	0.04
KH14-6_SSW011	2014-12-07	26.0697	159.1402	5	0.52483	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	24.7	35.15533	0.04
KH14-6_SSW086	2015-02-23	26.7242	142.6820	5	0.45115	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	18.7	34.89233	0.04
KH14-6_SSW010	2014-12-06	27.1673	157.3075	5	0.48640	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	24.2	35.05333	0.04
KH14-6_SSW009	2014-12-06	28.2537	155.4778	5	0.42391	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	22.6	34.87133	0.04
KH14-6_SSW008	2014-12-06	29.3308	153.6348	5	0.42780	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	22.1	34.80533	0.04
KH14-6_SSW087	2015-02-23	29.7633	141.6700	5	0.42360	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	17.2	34.82333	0.04
KH14-6_SSW007	2014-12-05	30.3488	151.6298	5	0.37077	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	21.4	34.62333	0.04
KH14-6_SSW006	2014-12-05	30.9947	149.9537	5	0.36398	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.6	34.62833	0.04
KH14-6_SSW088	2015-02-24	31.5417	141.0057	5	0.42298	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	17.0	34.78933	0.04
KH14-6_SSW005	2014-12-05	31.8557	147.7337	5	0.35228	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.4	34.60833	0.04
KH14-6_SSW004	2014-12-04	32.6885	145.5495	5	0.34850	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.8	34.56833	0.04
KH14-6_SSW003	2014-12-04	33.4800	143.4583	5	0.31680	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.5	34.42333	0.04
KH14-6_SSW002	2014-12-04	34.2490	141.3960	5	0.37963	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.4	34.59933	0.04
KH14-6_SSW001	2014-12-04	34.9257	139.6838	5	0.36312	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	17.9	34.49833	0.04
KH14-6_SSW070	2015-01-28	-27.7007	-170.0052	5	0.90447	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	23.0	35.79033	0.04
KH14-6_SSW034	2014-12-19	-27.6607	174.1683	5	0.93534	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	22.8	35.70433	0.04
KH14-6_SSW033	2014-12-19	-25.7825	174.3102	5	0.82967	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	23.5	35.77233	0.04
KH14-6_SSW032	2014-12-19	-24.0298	174.2978	5	0.81917	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	23.9	35.77233	0.04
KH14-6_SSW071	2015-01-29	-22.4778	-169.9997	5	0.85939	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	25.7	35.52033	0.04
KH14-6_SSW031	2014-12-18	-22.1773	174.2018	5	0.77389	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	25.1	35.58333	0.04
KH14-6_SSW030	2014-12-18	-20.0033	174.0788	5	0.81001	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	25.8	35.57333	0.04
KH14-6_SSW072	2015-01-31	-19.9998	-170.0000	5	0.76766	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.7	35.19033	0.04
KH14-6_SSW073	2015-01-31	-16.9733	-170.1852	5	0.57276	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.5	34.60233	0.04
KH14-6_SSW029	2014-12-17	-14.0823	173.9153	5	0.63477	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.5	34.83533	0.04
KH14-6_SSW074	2015-02-01	-13.0598	-169.9970	5	0.68458	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.6	34.59533	0.04
KH14-6_SSW028	2014-12-16	-12.1103	173.9178	5	0.63161	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.6	34.70233	0.04
KH14-6_SSW027	2014-12-16	-10.0920	173.5777	5	0.48506	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.0	34.58033	0.04
KH14-6_SSW026	2014-12-16	-8.2158	173.1832	5	0.47374	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.8	34.30933	0.04
KH14-6_SSW075	2015-02-03	-7.9840	-169.5972	5	0.67945	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.9	35.05433	0.04
KH14-6_SSW076	2015-02-05	-3.2055	-169.3135	5	0.63750	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.1	35.36833	0.04
KH14-6_SSW025	2014-12-14	-3.0358	172.0960	5	0.59054	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.3	35.39933	0.04
KH14-6_SSW077	2015-02-05	-2.5002	-169.4353	5	0.67142	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.0	35.35333	0.04
KH14-6_SSW024	2014-12-14	-1.3008	171.7405	5	0.55217	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.2	35.13133	0.04
KH14-6_SSW078	2015-02-07	0.0000	-169.9997	5	0.52928	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	28.0	35.22433	0.04
KH14-6_SSW023	2014-12-14	0.6217	171.3462	5	0.58400	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.2	35.09733	0.04
KH14-6_SSW079	2015-02-07	1.0270	-172.5320	5	0.54657	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	27.6	35.26133	0.04
KH14-6_SSW080	2015-02-07	1.9328	-174.7663	5	0.66062	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	27.8	35.17133	0.04
KH14-6_SSW022	2014-12-13	2.5483	170.9597	5	0.42600	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	29.3	34.94233	0.04
KH14-6_SSW021	2014-12-13	4.4905	170.5653	5	0.05900	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.9	33.93033	0.04
KH14-6_SSW020	2014-12-13	6.3698	170.0835	5	0.08733	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.4	33.81833	0.04
KH14-6_SSW082	2015-02-14	7.4400	166.9938	5	0.12141	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	27.7	33.94433	0.04
KH14-6_SSW019	2014-12-12	8.1870	169.2638	5	0.21133	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	28.1	34.03833	0.04
KH14-6_SSW083	2015-02-16	9.2447	159.0012	5	0.20097	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	27.3	34.15533	0.04
KH14-6_SSW018	2014-12-12	9.9790	168.5098	5	0.29867	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	27.9	34.30833	0.04
KH14-6_SSW084	2015-02-17	10.9287	151.5148	5	0.37368	0.05	IRMS (Gasbench 2 coupled to Delta plus Advantage; Thermo Fisher Scientific)	27.1	34.55233	0.04
KH14-6_SSW017	2014-12-12	11.7412	167.7980	5	0.37250	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	27.6	34.53133	0.04
KH14-6_SSW016	2014-12-11	13.2125	166.6020	5	0.39767	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	27.6	34.55633	0.04
KH14-6_SSW015	2014-12-10	16.7153	164.0757	5	0.59633	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	27.5	35.11933	0.04
KH14-6_SSW052	2015-01-04	-65.7268	-170.0093	5	-0.18401	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	-1.9	33.78933	0.04
KH14-6_SSW051	2014-12-31	-62.7277	-170.7838	5	-0.20049	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	-0.4	33.71733	0.04
KH14-6_SSW050	2014-12-31	-60.6792	-171.9995	5	-0.25109	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	2.1	33.80033	0.04
KH14-6_SSW049	2014-12-31	-59.1438	-172.8540	5	-0.25255	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	3.6	33.85033	0.04
KH14-6_SSW053	2015-01-06	-58.0005	-169.9963	5	-0.09783	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	3.7	33.86533	0.04
KH14-6_SSW048	2014-12-30	-57.3043	-173.8330	5	-0.14917	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	5.2	33.97133	0.04
KH14-6_SSW054	2015-01-07	-56.0985	-169.9963	5	-0.13030	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	5.8	33.96033	0.04
KH14-6_SSW055	2015-01-07	-54.1255	-169.9985	5	-0.03947	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	7.5	34.17733	0.04
KH14-6_SSW047	2014-12-29	-53.4072	-176.6965	5	0.04552	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	7.8	34.26033	0.04
KH14-6_SSW056	2015-01-07	-52.1295	-169.9983	5	0.17461	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	10.4	34.40133	0.04
KH14-6_SSW046	2014-12-29	-52.0522	-178.1030	5	-0.00710	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	8.7	34.23433	0.04
KH14-6_SSW045	2014-12-28	-50.4995	179.6583	5	0.05761	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	9.1	34.19833	0.04
KH14-6_SSW044	2014-12-28	-48.7802	178.6795	5	0.10187	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	10.1	34.28933	0.04
KH14-6_SSW057	2015-01-10	-48.3865	-169.9940	5	0.07188	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	11.1	34.37833	0.04
KH14-6_SSW043	2014-12-28	-47.2208	177.2148	5	0.16632	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	11.3	34.35233	0.04
KH14-6_SSW042	2014-12-27	-45.4105	176.3368	5	0.09215	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	12.8	34.32833	0.04
KH14-6_SSW058	2015-01-11	-43.5547	-170.0028	5	0.33178	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	13.7	34.79333	0.04
KH14-6_SSW041	2014-12-27	-43.5020	175.5825	5	0.44143	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	14.0	34.83833	0.04
KH14-6_SSW040	2014-12-27	-41.9702	174.9913	5	0.43275	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	13.9	34.78933	0.04
KH14-6_SSW060	2015-01-13	-38.9990	-170.0015	5	0.51680	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	16.4	35.04433	0.04
KH14-6_SSW039	2014-12-22	-38.7163	172.9515	5	0.61176	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	16.3	35.13833	0.04
KH14-6_SSW038	2014-12-22	-36.5617	172.3683	5	0.62160	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	17.8	35.28133	0.04
KH14-6_SSW061	2015-01-13	-36.4573	-170.0023	5	0.51163	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	17.2	35.16333	0.04
KH14-6_SSW069	2015-01-19	-36.2263	176.6638	5	0.63351	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	21.7	35.49933	0.04
KH14-6_SSW068	2015-01-19	-36.0850	178.2010	5	0.79217	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.8	35.62133	0.04
KH14-6_SSW067	2015-01-18	-35.9560	179.6068	5	0.78044	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.1	35.57033	0.04
KH14-6_SSW066	2015-01-18	-35.7393	-178.0227	5	0.76189	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.2	35.50833	0.04
KH14-6_SSW064	2015-01-18	-35.4052	-174.3717	5	0.58572	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	19.2	35.32433	0.04
KH14-6_SSW062	2015-01-14	-34.7968	-170.0022	5	0.68227	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	18.8	35.52933	0.04
KH14-6_SSW037	2014-12-21	-34.3088	171.7840	5	0.73246	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	17.8	35.43633	0.04
KH14-6_SSW036	2014-12-21	-32.2935	172.7775	5	0.80168	0.05	IRMS (Gasbench coupled to PRISM; Micromass UK)	20.8	35.68033	0.04