Singh, Dharmendra Pratap (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:
This dataset provides nitrogen isotopic composition (δ¹⁵N) and total nitrogen (TN) measurements from marine sediment core SSD004 GC11 in the southern Arabian Sea covering the last ~167 ka. The records document variability in water-column denitrification, an important control on marine nitrogen cycling and atmospheric N₂O emissions. δ¹⁵N values indicate strong coupling between primary productivity and denitrification during warm intervals, with weaker coupling during cold periods despite continued productivity linked to winter monsoon mixing. The new δ¹⁵N record 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
Funding:
Coverage:
Median Latitude: 14.213590 * Median Longitude: 67.246301 * 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
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
6 datasets
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Datasets listed in this bundled publication
- Singh, DP (2026): δ¹⁵N and TN records of sediment core SSD004 GC11. https://doi.pangaea.de/10.1594/PANGAEA.993903
- Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Arabian Sea Stack. https://doi.pangaea.de/10.1594/PANGAEA.993904
- Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Eastern Arabian Sea Stack. https://doi.pangaea.de/10.1594/PANGAEA.993908
- Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Northern Arabian Sea Stack. https://doi.pangaea.de/10.1594/PANGAEA.993905
- Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Southern Arabian Sea Stack. https://doi.pangaea.de/10.1594/PANGAEA.993906
- Singh, DP (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Western Arabian Sea Stack. https://doi.pangaea.de/10.1594/PANGAEA.993907