Singh, Dharmendra Pratap (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Southern Arabian Sea Stack [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993906 (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:
Isaji, Yuta; Kawahata, Hodaka; Ohkouchi, Naohiko; Ogawa, Nanako O; Murayama, Masafumi; Inoue, Kazuki; Tamaki, Kensaku (2015): Varying responses to I ndian monsoons during the past 220 kyr recorded in deep‐sea sediments in inner and outer regions of the G ulf of A den. Journal of Geophysical Research: Oceans, 120(11), 7253-7270, https://doi.org/10.1002/2015JC010982
Ivanochko, Tara S; Ganeshram, Raja S; Brummer, Geert-Jan A; Ganssen, Gerald M; Jung, S J A; Moreton, Stephen; Kroon, Dick (2005): Variations in tropical convection as an amplifier of global climate change at the millennial scale. Earth and Planetary Science Letters, 235(1-2), 302-314, https://doi.org/10.1016/j.epsl.2005.04.002
Suthhof, Andreas; Ittekkot, Venugopalan; Gaye-Haake, Birgit (2001): Millennial‐scale oscillation of denitrification intensity in the Arabian Sea during the Late Quaternary and its potential influence on atmospheric N 2 O and global climate. Global Biogeochemical Cycles, 15(3), 637-649, https://doi.org/10.1029/2000GB001337
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
Tiwari, Manish; Ramesh, R; Bhushan, Ravi; Sheshshayee, Madavalm S; Somayajulu, Bammidipati L K; Jull, A J Timothy; Burr, George S (2010): Did the Indo‐Asian summer monsoon decrease during the Holocene following insolation? Journal of Quaternary Science, 25(7), 1179-1188, https://doi.org/10.1002/jqs.1398
Additional metadata:
Funding:
Coverage:
Median Latitude: 12.070917 * Median Longitude: 57.029083 * South-bound Latitude: 6.000000 * West-bound Longitude: 46.932300 * North-bound Latitude: 14.983000 * East-bound Longitude: 78.931200
Date/Time Start: 1986-05-24T00:00:00 * Date/Time End: 1986-05-24T00:00:00
Minimum Elevation: -3212.0 m * Maximum Elevation: -1474.0 m
Event(s):
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 | Southern 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:
349 data points
Data
| 1 Age [ka BP] | 2 δ15N bulk [‰ air] | 3 δ15N std dev [±] |
|---|---|---|
| 0.1 | 0.93 | |
| 1.1 | 0.46 | 0.60 |
| 2.1 | 0.29 | 0.56 |
| 3.1 | 0.56 | 0.17 |
| 4.1 | 0.49 | 0.63 |
| 5.1 | 0.62 | 0.37 |
| 6.1 | 0.49 | 0.53 |
| 7.1 | 0.70 | 0.35 |
| 8.1 | 0.71 | 0.42 |
| 9.1 | 0.84 | 0.51 |
| 10.1 | 1.12 | 0.66 |
| 11.1 | 1.06 | 0.90 |
| 12.1 | 0.76 | 0.74 |
| 13.1 | 0.46 | 0.84 |
| 14.1 | 0.54 | 0.63 |
| 15.1 | -0.07 | 0.86 |
| 16.1 | -0.03 | 0.77 |
| 17.1 | -0.44 | 0.24 |
| 18.1 | -0.69 | 0.29 |
| 19.1 | -0.51 | 0.27 |
| 20.1 | -0.29 | 0.40 |
| 21.1 | -0.37 | 0.45 |
| 22.1 | -0.44 | 0.30 |
| 23.1 | -0.47 | 0.25 |
| 24.1 | -0.68 | 0.56 |
| 25.1 | -0.57 | 0.12 |
| 26.1 | -0.34 | 0.24 |
| 27.1 | -0.38 | 0.38 |
| 28.1 | -0.42 | 0.16 |
| 29.1 | -0.42 | 0.40 |
| 30.1 | -0.62 | 0.75 |
| 31.1 | -0.43 | 0.44 |
| 32.1 | 0.16 | 0.37 |
| 33.1 | -0.12 | 0.28 |
| 34.1 | -0.34 | 0.52 |
| 35.1 | 0.11 | 0.30 |
| 36.1 | -0.06 | 0.26 |
| 37.1 | 0.28 | 0.29 |
| 38.1 | 0.33 | 0.49 |
| 39.1 | -0.38 | 0.51 |
| 40.1 | -0.25 | 0.26 |
| 41.1 | 0.24 | 0.55 |
| 42.1 | 0.40 | 0.60 |
| 43.1 | 0.02 | 0.27 |
| 44.1 | 0.37 | 0.48 |
| 45.1 | 0.65 | 0.78 |
| 46.1 | 0.42 | 0.54 |
| 47.1 | 0.42 | 0.52 |
| 48.1 | 0.65 | 0.43 |
| 49.1 | 0.64 | 0.19 |
| 50.1 | 0.76 | 0.37 |
| 51.1 | 0.82 | 0.27 |
| 52.1 | 0.56 | 0.35 |
| 53.1 | 0.55 | 0.31 |
| 54.1 | 0.50 | 0.33 |
| 55.1 | 0.50 | 0.65 |
| 56.1 | 0.68 | 0.60 |
| 57.1 | -0.14 | 0.69 |
| 58.1 | -0.56 | 0.94 |
| 59.1 | -0.45 | 0.56 |
| 60.1 | -0.79 | 0.68 |
| 61.1 | -0.99 | 0.73 |
| 62.1 | -1.11 | 0.77 |
| 63.1 | -1.04 | 0.62 |
| 64.1 | -1.09 | 0.63 |
| 65.1 | -1.21 | 0.66 |
| 66.1 | -0.90 | 0.33 |
| 67.1 | -0.55 | 0.69 |
| 68.1 | -0.48 | 0.78 |
| 69.1 | -1.03 | 0.41 |
| 70.1 | -0.36 | 1.14 |
| 71.1 | -0.35 | 1.20 |
| 72.1 | -0.38 | 0.84 |
| 73.1 | -0.46 | 0.28 |
| 74.1 | -0.19 | 0.17 |
| 75.1 | -0.03 | 0.31 |
| 76.1 | 0.26 | 0.24 |
| 77.1 | 0.33 | 0.54 |
| 78.1 | 0.32 | 0.49 |
| 79.1 | 0.34 | 0.58 |
| 80.1 | 0.55 | 0.47 |
| 81.1 | 0.52 | 0.36 |
| 82.1 | 0.37 | 0.15 |
| 83.1 | 0.38 | 0.23 |
| 84.1 | -0.13 | 0.48 |
| 85.1 | -0.23 | 0.62 |
| 86.1 | -0.25 | 0.77 |
| 87.1 | -0.11 | 0.68 |
| 88.1 | 0.15 | 0.74 |
| 89.1 | 0.24 | 0.76 |
| 90.1 | 0.34 | 0.75 |
| 91.1 | 0.42 | 0.77 |
| 92.1 | 0.49 | 0.57 |
| 93.1 | 0.55 | 0.49 |
| 94.1 | 0.42 | 0.65 |
| 95.1 | 0.56 | 0.51 |
| 96.1 | 0.50 | 0.60 |
| 97.1 | 0.20 | 0.56 |
| 98.1 | 0.25 | 0.57 |
| 99.1 | -0.21 | 0.70 |
| 100.1 | -0.41 | 0.79 |
| 101.1 | -0.51 | 0.79 |
| 102.1 | -0.57 | 0.72 |
| 103.1 | -0.58 | 0.62 |
| 104.1 | -0.55 | 0.51 |
| 105.1 | -0.49 | 0.49 |
| 106.1 | -0.39 | 0.43 |
| 107.1 | -0.29 | 0.39 |
| 108.1 | -0.38 | 0.59 |
| 109.1 | -0.23 | 0.46 |
| 110.1 | -0.24 | 0.57 |
| 111.1 | 0.05 | 0.27 |
| 112.1 | 0.11 | 0.36 |
| 113.1 | 0.24 | 0.35 |
| 114.1 | 0.44 | 0.21 |
| 115.1 | 0.27 | 0.46 |
| 116.1 | 0.30 | 0.38 |
| 117.1 | 0.41 | 0.18 |
| 118.1 | 0.28 | 0.39 |
| 119.1 | 0.46 | 0.14 |
| 120.1 | 0.44 | 0.12 |
| 121.1 | 0.36 | 0.06 |
| 122.1 | 0.28 | 0.07 |
| 123.1 | 0.14 | 0.19 |
| 124.1 | 0.03 | 0.28 |
| 125.1 | 0.12 | 0.30 |
| 126.1 | -0.02 | 0.39 |
| 127.1 | -0.07 | 0.52 |
| 128.1 | -0.08 | 0.68 |
| 129.1 | 0.14 | 0.75 |
| 130.1 | 0.21 | 0.64 |
| 131.1 | 0.26 | 0.53 |
| 132.1 | 0.20 | 0.43 |
| 133.1 | 0.21 | 0.68 |
| 134.1 | 0.33 | 0.29 |
| 135.1 | 0.14 | 0.31 |
| 136.1 | 0.12 | 0.54 |
| 137.1 | 0.12 | 0.77 |
| 138.1 | 0.00 | 0.90 |
| 139.1 | 0.06 | 0.74 |
| 140.1 | 0.06 | 0.64 |
| 141.1 | 0.09 | 0.60 |
| 142.1 | 0.19 | 0.61 |
| 143.1 | 0.11 | 0.58 |
| 144.1 | 0.25 | 0.95 |
| 145.1 | -0.02 | 0.85 |
| 146.1 | -0.35 | 0.69 |
| 147.1 | -0.43 | 0.99 |
| 148.1 | -0.75 | 0.86 |
| 149.1 | -0.81 | 0.77 |
| 150.1 | -0.78 | 0.83 |
| 151.1 | -0.51 | 1.18 |
| 152.1 | -0.90 | 0.54 |
| 153.1 | -0.92 | 0.55 |
| 154.1 | -0.72 | 0.85 |
| 155.1 | -0.78 | 0.77 |
| 156.1 | -0.54 | 0.83 |
| 157.1 | -0.39 | 0.75 |
| 158.1 | -0.37 | 0.66 |
| 159.1 | -0.15 | 0.87 |
| 160.1 | -0.03 | 0.96 |
| 161.1 | -0.04 | 0.90 |
| 162.1 | 0.05 | 0.95 |
| 163.1 | -0.14 | 0.73 |
| 164.1 | 0.37 | 1.08 |
| 165.1 | 0.33 | 0.90 |
| 166.1 | 0.57 | 1.04 |
| 167.1 | 0.37 | 0.78 |
| 168.1 | 0.24 | 0.90 |
| 169.1 | 0.23 | 0.72 |
| 170.1 | 0.21 | 0.55 |
| 171.1 | 0.19 | 0.37 |
| 172.1 | 0.19 | 0.21 |
| 173.1 | 0.19 | 0.06 |
| 174.1 | 0.18 | 0.06 |