/* DATA DESCRIPTION:
Citation:	Singh, Dharmendra Pratap (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Eastern Arabian Sea Stack [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993908 (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
References:	Banakar, Virupaxa K; Oba, Tadamichi; Chodankar, A R; Kuramoto, Takayuki; Yamamoto, Masanobu; Minagawa, Masao (2005): Monsoon related changes in sea surface productivity and water column denitrification in the Eastern Arabian Sea during the last glacial cycle. Marine Geology, 219(2-3), 99-108, https://doi.org/10.1016/j.margeo.2005.05.004
	Ganeshram, Raja S; Pedersen, Thomas F; Calvert, Stephen E; McNeill, Gavin W; Fontugne, Michel R (2000): Glacial‐interglacial variability in denitrification in the World's Oceans: Causes and consequences. Paleoceanography, 15(4), 361-376, https://doi.org/10.1029/1999PA000422
	Kessarkar, Pratima Mohan; Rao, V Purnachadra; Naqvi, Syed Wajih Ahmad; Chivas, Allan R; Saino, Toshiro (2011): Fluctuations in productivity and denitrification in the southeastern Arabian Sea during the Late Quaternary. Current Science, 99, 485-491, https://www.jstor.org/stable/24109571
	Kim, Ji-Eun; Khim, Boo-Keun; Ikehara, Minoru; Lee, Jongmin (2018): Orbital-scale denitrification changes in the Eastern Arabian Sea during the last 800 kyrs. Scientific Reports, 8(1), https://doi.org/10.1038/s41598-018-25415-7
	Möbius, Jürgen; Gaye, Birgit; Lahajnar, Niko; Bahlmann, Enno; Emeis, Kay-Christian (2011): Influence of diagenesis on sedimentary d15N in the Arabian Sea over the last 130 kyr. Marine Geology, 284(1-4), 127-138, https://doi.org/10.1016/j.margeo.2011.03.013
	Tesdal, J-E; Galbraith, Eric Douglas; Kienast, Markus (2013): NOAA/WDS Paleoclimatology - NICOPP Global Ocean Sediment Nitrogen Isotope Database [dataset]. NOAA National Centers for Environmental Information, https://doi.org/10.25921/W9CA-1Z10
Additional metadata:	Arabian Sea cores, references and chronology (URI: https://download.pangaea.de/reference/139702/attachments/References_chronology.xlsx)
Funding:	Science and Engineering Research Board (SERB), grant/award no. SRG/2021/000620
Coverage:	MEDIAN LATITUDE: 15.171267 * MEDIAN LONGITUDE: 71.233827 * SOUTH-BOUND LATITUDE: 12.630000 * WEST-BOUND LONGITUDE: 68.582000 * NORTH-BOUND LATITUDE: 16.621333 * EAST-BOUND LONGITUDE: 73.330000
	DATE/TIME START: 1976-01-01T00:00:00 * DATE/TIME END: 1976-01-01T00:00:00
	MINIMUM ELEVATION: -3820.0 m * MAXIMUM ELEVATION: -1230.0 m
Event(s):	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)
	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)
	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
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: Eastern 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:	284 data points
*/
Age [ka BP]	δ15N bulk [‰ air]	δ15N std dev [±]
0.1	0.89	
1.1	0.98	0.65
2.1	0.93	0.35
3.1	0.93	0.18
4.1	0.37	0.54
5.1	0.53	0.39
6.1	0.37	0.56
7.1	0.27	0.42
8.1	-0.02	0.27
9.1	-0.12	0.36
10.1	-0.01	0.51
11.1	0.13	0.75
12.1	0.00	0.64
13.1	-0.13	0.49
14.1	-0.41	0.29
15.1	0.04	0.67
16.1	-0.28	1.14
17.1	-0.30	1.12
18.1	-0.22	0.80
19.1	-0.24	0.61
20.1	-0.30	0.55
21.1	-0.24	0.44
22.1	-0.46	0.73
23.1	-0.32	0.68
24.1	-0.14	0.65
25.1	-0.19	0.76
26.1	-0.17	0.71
27.1	0.38	0.90
28.1	0.65	0.95
29.1	0.42	0.50
30.1	0.24	0.66
31.1	0.27	0.62
32.1	0.45	0.46
33.1	0.25	0.54
34.1	0.14	0.59
35.1	0.20	0.58
36.1	0.46	0.60
37.1	0.70	0.70
38.1	0.80	0.87
39.1	0.73	1.00
40.1	0.67	1.10
41.1	0.36	1.03
42.1	0.42	0.85
43.1	0.55	0.61
44.1	0.75	0.50
45.1	0.50	0.53
46.1	0.89	0.97
47.1	1.10	1.08
48.1	0.93	1.08
49.1	0.78	1.18
50.1	0.55	1.14
51.1	0.18	1.00
52.1	-0.03	1.05
53.1	-0.15	0.77
54.1	-0.27	0.65
55.1	-0.28	0.71
56.1	-0.71	0.42
57.1	-0.88	0.44
58.1	-1.26	0.70
59.1	-1.13	0.56
60.1	-1.09	0.57
61.1	-1.06	0.55
62.1	-0.96	0.61
63.1	-0.88	0.86
64.1	-1.05	0.42
65.1	-1.04	0.35
66.1	-0.93	0.33
67.1	-0.92	0.42
68.1	-0.63	0.64
69.1	-0.63	0.49
70.1	-0.44	0.54
71.1	-0.65	0.22
72.1	-0.45	0.40
73.1	0.25	0.87
74.1	0.75	0.91
75.1	0.44	0.80
76.1	0.16	0.53
77.1	0.40	0.52
78.1	0.40	0.70
79.1	0.31	0.91
80.1	-0.15	0.53
81.1	-0.34	0.62
82.1	-0.65	0.62
83.1	-0.79	0.33
84.1	-0.71	0.33
85.1	-0.56	0.01
86.1	-0.32	0.79
87.1	-0.09	1.12
88.1	0.00	1.12
89.1	-0.02	1.11
90.1	-0.03	1.11
91.1	0.13	1.41
92.1	0.24	1.36
93.1	0.17	1.02
94.1	-0.09	0.80
95.1	-0.18	0.55
96.1	0.01	0.56
97.1	-0.20	0.45
98.1	-0.49	0.64
99.1	-0.29	0.32
100.1	-0.11	0.15
101.1	-0.34	0.31
102.1	-0.29	0.38
103.1	0.16	0.11
104.1	0.71	0.74
105.1	1.34	
106.1	1.46	
107.1	1.25	
108.1	0.85	
109.1	0.45	
110.1	0.83	
111.1	1.25	
112.1	1.60	
113.1	1.76	
114.1	1.93	
115.1	1.15	1.03
116.1	0.98	0.99
117.1	0.82	0.95
118.1	0.34	0.47
119.1	-0.16	0.04
120.1	-0.55	0.41
121.1	-0.66	0.36
122.1	-0.76	0.31
123.1	-0.90	0.32
124.1	-1.07	0.38
125.1	-1.15	0.55
126.1	-1.04	0.44
127.1	-0.79	0.13
128.1	-1.30	0.96
129.1	-1.21	1.29
130.1	-0.80	1.15
131.1	-0.60	1.31
132.1	-0.51	1.42
133.1	0.30	
134.1	0.11	
135.1	-0.08	
136.1	-0.13	
137.1	-0.19	
138.1	-0.24	
139.1		
140.1		
141.1		
142.1		
143.1	0.42	
144.1	0.07	
145.1	-0.28	
146.1	-0.49	
147.1	-0.24	
148.1	0.00	
149.1	0.24	
150.1	0.36	
151.1	0.35	
152.1	0.34	
153.1	0.30	
154.1	0.04	
155.1	-0.23	
156.1	-0.50	
157.1		
158.1		
159.1	-0.19	
160.1	-0.18	
161.1	-0.20	
162.1	-0.38	
163.1	-0.55	
164.1	-0.45	
165.1	-0.36	
166.1	-0.38	
167.1	-0.41	
168.1		
169.1		
170.1		
171.1		
172.1		
173.1		
174.1