Singh, Dharmendra Pratap (2026): Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Northern Arabian Sea Stack [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993905 (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:
Jaeschke, Andrea; Ziegler, Martin; Hopmans, Ellen C; Reichart, Gert-Jan; Lourens, Lucas Joost; Schouten, Stefan; Sinninghe Damsté, Jaap S (2009): Molecular fossil evidence for anaerobic ammonium oxidation in the Arabian Sea over the last glacial cycle. Paleoceanography, 24(2), PA2202, https://doi.org/10.1029/2008PA001712
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
Pichevin, Laetitia; Bard, Edouard; Martinez, Philippe; Billy, Isabelle (2007): Evidence of ventilation changes in the Arabian Sea during the late Quaternary: Implication for denitrification and nitrous oxide emission. Global Biogeochemical Cycles, 21, GB4008, https://doi.org/10.1029/2006GB002852
Reichart, Gert-Jan; Lourens, Lucas Joost; Zachariasse, Willem-Jan (1998): Temporal variability in the northern Arabian Sea oxygen minimum zone (OMZ) during the last 225,000 years. Paleoceanography, 13(6), 607-621, https://doi.org/10.1029/98PA02203
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
References:
Jaeschke, Andrea; Ziegler, Martin; Hopmans, Ellen C; Reichart, Gert-Jan; Lourens, Lucas Joost; Schouten, Stefan; Sinninghe Damsté, Jaap S (2009): Figure 4. Geochemistry on sediment core MD04-2879 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.742495
Pichevin, Laetitia; Bard, Edouard; Martinez, Philippe; Billy, Isabelle (2007): Biogeochemical investigations on sediment core MD04-2876 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.727157
Reichart, Gert-Jan; Lourens, Lucas Joost; Zachariasse, Willem-Jan (1998): Organic carbon content, stable isotopes and planktonic foraminifera in sediments of tghe norther Arabian Sea oxygen minimum zone [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.857398
Additional metadata:
Funding:
Coverage:
Median Latitude: 22.716578 * Median Longitude: 64.959477 * South-bound Latitude: 19.999000 * West-bound Longitude: 63.585000 * North-bound Latitude: 24.842830 * East-bound Longitude: 66.483000
Date/Time Start: 1992-10-06T00:00:00 * Date/Time End: 2004-09-21T00:00:00
Minimum Elevation: -3167.0 m * Maximum Elevation: -775.0 m
Event(s):
MD04-2876 * Latitude: 24.842830 * Longitude: 64.008160 * Elevation: -828.0 m * Recovery: 33 m * Location: Pakistan continental margin * Campaign: MD143 (CHAMAK) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: located within the present day OMZ (oxygen minimum zone)
MD04-2879CQ * Latitude: 22.548300 * Longitude: 64.046700 * Date/Time: 2004-09-21T00:00:00 * Elevation: -920.0 m * Location: Gulf of Oman * Campaign: MD143 (CHAMAK) * Basis: Marion Dufresne (1995) * Method/Device: Calypso square corer (CASQ)
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 | Northern 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:
311 data points