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