https://doi.pangaea.de/10.1594/PANGAEA.993906Singh, Dharmendra PratapDharmendra PratapSingh0000-0001-5563-1633Indian Institute of Technology RoorkeePANGAEA2026Arabian Sead15NSedimentary geochemistryStackTNAGEδ15N, bulk sedimentδ15N, standard deviationSediment corerKasten corerGravity corerStackedcalculated, 1 sigmaSO42SonneSindhu Sadhana1986-05-24T00:00:00Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99389810.1016/j.gloplacha.2026.10537310.1002/2015JC01098210.1016/j.epsl.2005.04.00210.1029/2000GB00133710.25921/W9CA-1Z1010.1002/jqs.1398349 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.46.932378.93126.014.983Arabian SeaScience and Engineering Research Boardhttps://doi.org/10.13039/501100001843SRG/2021/000620