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)
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Published: 2026-04-29
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.
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:
Funding:
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 * 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) * Method/Device: Piston corer (PC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | AGE | Age | ka BP | Singh, Dharmendra Pratap | Geocode | |
| 2 | δ15N, bulk sediment | δ15N bulk | ‰ air | Singh, Dharmendra Pratap | Stacked | Eastern Arabian Sea Stack |
| 3 | δ15N, standard deviation | δ15N std dev | ± | Singh, Dharmendra Pratap | calculated, 1 sigma |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
284 data points
Data
| 1 Age [ka BP] | 2 δ15N bulk [‰ air] | 3 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 |