https://doi.pangaea.de/10.1594/PANGAEA.993908Singh, Dharmendra PratapDharmendra PratapSingh0000-0001-5563-1633Indian Institute of Technology RoorkeePANGAEA2026Arabian Sead15NSedimentary geochemistryStackTNAGEδ15N, bulk sedimentδ15N, standard deviationComposite CorePiston corerSediment corerStackedcalculated, 1 sigmaExp355MD10Joides ResolutionMarion Dufresne (1972)1976-01-01T00:00:00Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99389810.1016/j.gloplacha.2026.10537310.1016/j.margeo.2005.05.00410.1029/1999PA000422https://www.jstor.org/stable/2410957110.1038/s41598-018-25415-710.1016/j.margeo.2011.03.01310.25921/W9CA-1Z10284 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.68.58273.3312.6316.62133333Indian OceanScience and Engineering Research Boardhttps://doi.org/10.13039/501100001843SRG/2021/000620