Singh, Dharmendra Pratap (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Western Arabian Sea Stack [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993907 (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:
Altabet, Mark A; Francois, Roger; Murray, David W; Prell, Warren L (1995): Climate-related variations in denitrification in the Arabian Sea from sediment 15N/14N ratios. Nature, 373(6514), 506-509, https://doi.org/10.1038/373506a0
Altabet, Mark A; Higginson, Matthew J; Murray, David W (2002): NOAA/WDS Paleoclimatology - Arabian Sea Denitrification Data [dataset]. NOAA National Centers for Environmental Information, https://doi.org/10.25921/K2ME-E263
Altabet, Mark A; Higginson, Matthew J; Murray, David W (2002): The effect of millennial-scale changes in Arabian Sea denitrification on atmospheric CO2. Nature, 415(6868), 159-162, https://doi.org/10.1038/415159a
Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Climatically linked oscillations in Arabian Sea denitrification over the past 1 m.y.: Implications for the marine N cycle. Paleoceanography, 14(6), 732-743, https://doi.org/10.1029/1999PA900035
Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Nitrogen content and isotope ratios of ODP Hole 117-722B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856637
Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Nitrogen content and isotope ratios of sediment core RC27-61 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856638
Burdanowitz, Nicole; Schmiedl, Gerhard; Gaye, Birgit; Munz, Philipp; Schulz, Hartmut (2024): Nitrogen isotope record and TOC accumulation rates of sediment core GeoTü SL167 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964228
Burdanowitz, Nicole; Schmiedl, Gerhard; Gaye, Birgit; Munz, Philipp M; Schulz, Hartmut (2024): Distinct oxygenation modes of the Gulf of Oman over the past 43 000 years – a multi-proxy approach. Biogeosciences, 21(6), 1477-1499, https://doi.org/10.5194/bg-21-1477-2024
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Additional metadata:
Funding:
Coverage:
Median Latitude: 18.304995 * Median Longitude: 58.735577 * South-bound Latitude: 16.621800 * West-bound Longitude: 57.590000 * North-bound Latitude: 22.619170 * East-bound Longitude: 59.861660
Date/Time Start: 1986-05-26T00:00:00 * 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 * Method/Device: Composite Core (COMPCORE) * Comment: 88 cores; 845.1 m cored; 0 m drilled; 72.4% recovery
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) * Method/Device: Gravity corer (Kiel type) (SL)
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)
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 | Western 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:
347 data points