https://doi.pangaea.de/10.1594/PANGAEA.993907Singh, Dharmendra PratapDharmendra PratapSingh0000-0001-5563-1633Indian Institute of Technology RoorkeePANGAEA2026Arabian Sead15NSedimentary geochemistryStackTNAGEδ15N, bulk sedimentδ15N, standard deviationComposite CoreGravity corer (Kiel type)Piston corerStackedcalculated, 1 sigmaLeg117M74/1bRC27Joides ResolutionMeteor (1986)Robert Conrad1986-05-26T00:00:00/2007-10-02T21:32:00Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99389810.1016/j.gloplacha.2026.10537310.1038/373506a010.25921/K2ME-E26310.1038/415159a10.1029/1999PA90003510.1594/PANGAEA.85663710.1594/PANGAEA.85663810.1594/PANGAEA.96422810.5194/bg-21-1477-202410.25921/W9CA-1Z10347 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThe 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.57.5959.8616616.621822.61917Arabian SeaOman MarginIndian OceanScience and Engineering Research Boardhttps://doi.org/10.13039/501100001843SRG/2021/000620