/* DATA DESCRIPTION:
Citation:	Singh, Dharmendra Pratap (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Arabian Sea Stack [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993904 (DOI registration in progress), 
	In: Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records including core SSD004 GC11 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993898 (DOI registration in progress)
Abstract:	The new δ¹⁵N record of sediment core SSD004_GC11 is combined with published regional datasets to produce a basin-wide Arabian Sea denitrification stack. Spectral and cross-wavelet analyses reveal dominant orbital-scale variability, with stronger obliquity influence in the southern basin and precession dominance in northern records. Coherent variability between δ¹⁵N records and atmospheric N₂O concentrations highlights orbital forcing as a key driver of long-term nitrogen cycling and greenhouse gas variability.
Keyword(s):	Arabian Sea; d15N; Sedimentary geochemistry; Stack; TN
Related to:	Pawar, Rahul; Singh, Dharmendra Pratap; Saraswat, Rajeev; Maurya, A S (2026): Orbital forcing regulated Arabian Sea denitrification during the late Pleistocene. Global and Planetary Change, 259, 105373, https://doi.org/10.1016/j.gloplacha.2026.105373
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Funding:	Science and Engineering Research Board (SERB), grant/award no. SRG/2021/000620
Coverage:	MEDIAN LATITUDE: 17.148316 * MEDIAN LONGITUDE: 62.631041 * SOUTH-BOUND LATITUDE: 6.000000 * WEST-BOUND LONGITUDE: 46.932300 * NORTH-BOUND LATITUDE: 24.842830 * EAST-BOUND LONGITUDE: 78.931200
	DATE/TIME START: 1976-01-01T00:00:00 * DATE/TIME END: 2007-10-02T21:32:00
	MINIMUM ELEVATION: -4040.0 m * MAXIMUM ELEVATION: -455.0 m
Event(s):	117-722 * LATITUDE: 16.621800 * LONGITUDE: 59.795300 * DATE/TIME START: 1987-09-07T00:00:00 * DATE/TIME END: 1987-09-13T00:00:00 * ELEVATION: -2033.5 m * PENETRATION: 845.6 m * RECOVERY: 611.8 m * LOCATION: Arabian Sea * CAMPAIGN: Leg117 * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Composite Core (COMPCORE) * COMMENT: 88 cores; 845.1 m cored; 0 m drilled; 72.4% recovery
	355-U1456 * LATITUDE: 16.621333 * LONGITUDE: 68.838833 * ELEVATION: -3640.0 m * CAMPAIGN: Exp355 * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Composite Core (COMPCORE)
	GOA4 * LATITUDE: 12.821500 * LONGITUDE: 46.932300 * ELEVATION: -1474.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	GOA6 * LATITUDE: 14.983000 * LONGITUDE: 53.767000 * ELEVATION: -2416.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	M74/1b_960-1 (SL 167) * LATITUDE: 22.619170 * LONGITUDE: 59.691500 * DATE/TIME: 2007-10-02T21:32:00 * ELEVATION: -774.0 m * RECOVERY: 7.40 m * LOCATION: Oman Margin * CAMPAIGN: M74/1b * BASIS: Meteor (1986) (URI: https://en.wikipedia.org/wiki/RV_Meteor_(1986)) * METHOD/DEVICE: Gravity corer (Kiel type) (SL)
	MD04-2876 * LATITUDE: 24.842830 * LONGITUDE: 64.008160 * ELEVATION: -828.0 m * RECOVERY: 33 m * LOCATION: Pakistan continental margin * CAMPAIGN: MD143 (CHAMAK) (URI: http://www.ifremer.fr/sismer/UK/catal/campagne/campagnea.htql?crno=4200250) * BASIS: Marion Dufresne (1995) (URI: https://en.wikipedia.org/wiki/Marion_Dufresne_(1994)) * METHOD/DEVICE: Calypso Corer (CALYPSO) * COMMENT: located within the present day OMZ (oxygen minimum zone)
	MD04-2879CQ * LATITUDE: 22.548300 * LONGITUDE: 64.046700 * DATE/TIME: 2004-09-21T00:00:00 * ELEVATION: -920.0 m * LOCATION: Gulf of Oman * CAMPAIGN: MD143 (CHAMAK) (URI: http://www.ifremer.fr/sismer/UK/catal/campagne/campagnea.htql?crno=4200250) * BASIS: Marion Dufresne (1995) (URI: https://en.wikipedia.org/wiki/Marion_Dufresne_(1994)) * METHOD/DEVICE: Calypso square corer (CASQ)
	MD76-131 * LATITUDE: 15.530000 * LONGITUDE: 72.568300 * DATE/TIME: 1976-01-01T00:00:00 * ELEVATION: -1230.0 m * RECOVERY: 9.5 m * LOCATION: Indian Ocean * CAMPAIGN: MD10 (OSIRIS II) * BASIS: Marion Dufresne (1972) (URI: https://fr.wikipedia.org/wiki/Marion_Dufresne_(1972)) * METHOD/DEVICE: Piston corer (PC)
	ME33-EAST * LATITUDE: 15.592000 * LONGITUDE: 68.582000 * ELEVATION: -3820.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	ME33-NAST * LATITUDE: 19.999000 * LONGITUDE: 65.684000 * ELEVATION: -3167.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	NIOP_905 * LATITUDE: 10.920000 * LONGITUDE: 51.940000 * LOCATION: Arabian Sea
	NIOP-D2_455-1 * LATITUDE: 23.556670 * LONGITUDE: 65.950000 * DATE/TIME: 1992-10-06T00:00:00 * ELEVATION: -1002.0 m * LOCATION: Arabian Sea * CAMPAIGN: NIOP-D2 * BASIS: Tyro * METHOD/DEVICE: Piston corer (PC)
	NIOP-D2_464-1 * LATITUDE: 22.256670 * LONGITUDE: 63.585000 * DATE/TIME: 1992-10-15T00:00:00 * ELEVATION: -1470.0 m * LOCATION: Arabian Sea * CAMPAIGN: NIOP-D2 * BASIS: Tyro * METHOD/DEVICE: Piston corer (PC)
	RC27-14 * LATITUDE: 18.253000 * LONGITUDE: 57.655000 * DATE/TIME: 1986-05-26T00:00:00 * ELEVATION: -4040.0 m * RECOVERY: 10.85 m * LOCATION: Indian Ocean * CAMPAIGN: RC27 * BASIS: Robert Conrad * METHOD/DEVICE: Piston corer (PC)
	RC27-23 * LATITUDE: 17.993000 * LONGITUDE: 57.590000 * DATE/TIME: 1986-05-27T00:00:00 * ELEVATION: -2225.0 m * RECOVERY: 10.78 m * LOCATION: Indian Ocean * CAMPAIGN: RC27 * BASIS: Robert Conrad * METHOD/DEVICE: Piston corer (PC)
	RC27-24 * LATITUDE: 17.718000 * LONGITUDE: 57.820000 * DATE/TIME: 1986-05-27T00:00:00 * ELEVATION: -1416.0 m * RECOVERY: 11.62 m * LOCATION: Indian Ocean * CAMPAIGN: RC27 * BASIS: Robert Conrad * METHOD/DEVICE: Piston corer (PC) * COMMENT: depth not available
	RC27-61 * LATITUDE: 16.625000 * LONGITUDE: 59.861660 * DATE/TIME: 1986-06-07T00:00:00 * ELEVATION: -455.0 m * RECOVERY: 11.2 m * LOCATION: Indian Ocean * CAMPAIGN: RC27 * BASIS: Robert Conrad * METHOD/DEVICE: Piston corer (PC)
	SK117_GC_08 * LATITUDE: 15.483000 * LONGITUDE: 72.850000 * ELEVATION: -2500.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	SK126-GC39 * LATITUDE: 12.630000 * LONGITUDE: 73.330000 * ELEVATION: -1940.0 m
	SO42-74KL (KL-74, AS-12) * LATITUDE: 14.321000 * LONGITUDE: 57.347000 * DATE/TIME: 1986-05-24T00:00:00 * ELEVATION: -3212.0 m * RECOVERY: 3.16 m * LOCATION: Arabian Sea * CAMPAIGN: SO42 * BASIS: Sonne (URI: https://en.wikipedia.org/wiki/RV_Sonne) * METHOD/DEVICE: Kasten corer (KAL)
	SO90_111KL * LATITUDE: 23.096000 * LONGITUDE: 66.483000 * DATE/TIME: 1993-09-19T00:00:00 * ELEVATION: -775.0 m * RECOVERY: 14.45 m * LOCATION: Arabian Sea * CAMPAIGN: SO90 (PAKOMIN) * BASIS: Sonne (URI: https://en.wikipedia.org/wiki/RV_Sonne) * METHOD/DEVICE: Piston corer (BGR type) (KL) * COMMENT: GPS,
	SS4018G * LATITUDE: 13.380000 * LONGITUDE: 53.257000 * ELEVATION: -2830.0 m * METHOD/DEVICE: Sediment corer (SEDCO)
	SSD004_GC11 * LATITUDE: 6.000000 * LONGITUDE: 78.931200 * ELEVATION: -2901.0 m * BASIS: Sindhu Sadhana (URI: https://www.nio.res.in/research/research-vessels/rv-sindhu-sadhana) * METHOD/DEVICE: Gravity corer (GC)
Parameter(s):	AGE [ka BP] (Age) * GEOCODE * PI: Singh, Dharmendra Pratap (https://orcid.org/0000-0001-5563-1633, dharmendra.singh@es.iitr.ac.in)
	δ15N, bulk sediment [‰ air] (δ15N bulk) * PI: Singh, Dharmendra Pratap (https://orcid.org/0000-0001-5563-1633, dharmendra.singh@es.iitr.ac.in) * METHOD/DEVICE: Stacked * COMMENT: Arabian Sea Stack
	δ15N, standard deviation [±] (δ15N std dev) * PI: Singh, Dharmendra Pratap (https://orcid.org/0000-0001-5563-1633, dharmendra.singh@es.iitr.ac.in) * METHOD/DEVICE: calculated, 1 sigma
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	350 data points
*/
Age [ka BP]	δ15N bulk [‰ air]	δ15N std dev [±]
0.1	1.51	0.71
1.1	1.07	0.77
2.1	0.94	0.72
3.1	0.96	0.55
4.1	0.80	0.73
5.1	0.79	0.52
6.1	0.66	0.56
7.1	0.58	0.49
8.1	0.42	0.55
9.1	0.52	0.71
10.1	0.74	0.90
11.1	0.49	0.95
12.1	0.11	0.78
13.1	0.27	0.63
14.1	0.19	0.88
15.1	-0.40	0.78
16.1	-0.61	0.86
17.1	-0.66	0.71
18.1	-0.61	0.49
19.1	-0.46	0.44
20.1	-0.41	0.43
21.1	-0.45	0.42
22.1	-0.45	0.42
23.1	-0.46	0.61
24.1	-0.69	0.55
25.1	-0.67	0.51
26.1	-0.60	0.55
27.1	-0.44	0.80
28.1	-0.60	0.95
29.1	-0.52	0.75
30.1	-0.39	0.81
31.1	-0.43	0.62
32.1	-0.06	0.53
33.1	-0.08	0.61
34.1	-0.23	0.76
35.1	0.33	0.70
36.1	0.00	0.61
37.1	0.30	1.00
38.1	0.30	0.95
39.1	-0.04	0.85
40.1	0.18	1.04
41.1	0.30	0.85
42.1	0.52	0.78
43.1	0.09	0.76
44.1	0.62	0.78
45.1	0.62	1.04
46.1	0.29	0.84
47.1	0.63	0.88
48.1	0.82	0.95
49.1	0.79	0.89
50.1	1.04	0.97
51.1	0.93	1.09
52.1	0.47	0.74
53.1	0.30	0.72
54.1	0.13	0.84
55.1	0.39	0.78
56.1	0.37	1.03
57.1	-0.01	1.09
58.1	-0.43	1.11
59.1	-0.66	1.01
60.1	-0.90	1.01
61.1	-0.98	1.06
62.1	-1.03	1.00
63.1	-1.05	0.75
64.1	-1.17	0.59
65.1	-1.05	0.57
66.1	-1.02	0.39
67.1	-0.74	0.91
68.1	-0.74	0.62
69.1	-0.75	0.59
70.1	-0.53	0.71
71.1	-0.51	0.72
72.1	-0.41	0.64
73.1	-0.17	0.73
74.1	0.21	0.90
75.1	0.12	0.85
76.1	0.02	0.77
77.1	0.02	0.91
78.1	0.14	0.80
79.1	0.41	1.00
80.1	0.15	0.68
81.1	0.04	0.72
82.1	-0.12	0.71
83.1	-0.17	0.68
84.1	-0.38	0.58
85.1	-0.46	0.54
86.1	-0.39	0.62
87.1	-0.23	0.72
88.1	-0.04	0.86
89.1	0.13	0.99
90.1	0.26	1.01
91.1	0.38	1.02
92.1	0.53	1.00
93.1	0.57	0.89
94.1	0.51	0.83
95.1	0.56	0.73
96.1	0.58	0.73
97.1	0.43	0.76
98.1	0.28	0.85
99.1	0.19	0.83
100.1	0.04	0.99
101.1	-0.09	0.93
102.1	-0.10	0.84
103.1	-0.11	0.89
104.1	-0.06	1.00
105.1	-0.05	1.01
106.1	-0.03	1.01
107.1	-0.13	0.83
108.1	-0.30	0.90
109.1	-0.21	0.80
110.1	-0.18	0.89
111.1	-0.05	0.96
112.1	0.05	1.03
113.1	0.24	0.97
114.1	0.49	0.86
115.1	0.61	0.79
116.1	0.75	0.76
117.1	0.81	0.74
118.1	0.69	0.68
119.1	0.65	0.64
120.1	0.56	0.72
121.1	0.51	0.74
122.1	0.45	0.78
123.1	0.43	0.87
124.1	0.35	1.08
125.1	0.25	1.14
126.1	0.09	0.91
127.1	-0.21	0.78
128.1	-0.46	0.91
129.1	-0.42	0.90
130.1	-0.35	0.84
131.1	-0.22	0.92
132.1	-0.16	1.03
133.1	0.02	0.93
134.1	0.12	0.78
135.1	0.05	0.57
136.1	0.17	0.57
137.1	0.17	0.55
138.1	0.25	0.74
139.1	0.33	0.54
140.1	0.09	0.57
141.1	0.06	0.62
142.1	0.16	0.89
143.1	0.25	1.10
144.1	0.20	1.18
145.1	0.24	1.16
146.1	-0.25	0.71
147.1	-0.19	0.92
148.1	-0.28	0.97
149.1	-0.38	0.86
150.1	-0.49	0.73
151.1	-0.51	0.82
152.1	-0.76	0.63
153.1	-0.75	0.69
154.1	-0.68	0.72
155.1	-0.73	0.69
156.1	-0.72	0.71
157.1	-0.66	0.81
158.1	-0.52	0.98
159.1	-0.41	0.95
160.1	-0.29	1.00
161.1	-0.23	0.97
162.1	-0.33	0.81
163.1	-0.40	0.55
164.1	0.09	0.72
165.1	0.16	0.64
166.1	0.07	1.11
167.1	0.62	0.85
168.1	0.59	0.69
169.1	-0.13	1.01
170.1	-0.18	0.60
171.1	-0.08	0.32
172.1	0.17	0.38
173.1	0.47	0.83
174.1	0.45	0.67