PANGAEA_993908 Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Eastern Arabian Sea Stack Singh, Dharmendra Pratap Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Eastern Arabian Sea Stack 2026-04-29 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993908 Investigator Dharmendra Pratap Singh dharmendra.singh@es.iitr.ac.in Earth Science AGE δ15N, bulk sediment δ15N, standard deviation geoscientificInformation 355-U1456 Arabian Sea Composite Core d15N Exp355 MD10 MD76-131 ME33-EAST Piston corer Sedimentary geochemistry Sediment corer SK117_GC_08 SK126-GC39 Stack TN Stacked calculated, 1 sigma Joides Resolution Marion Dufresne (1972) 1976-01-01 1976-01-01 Complete 12.63 16.62133333 68.582 73.33 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 284 data points text/tab-separated-values 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 Banakar, Virupaxa K; Oba, Tadamichi; Chodankar, A R; Kuramoto, Takayuki; Yamamoto, Masanobu; Minagawa, Masao (2005): Monsoon related changes in sea surface productivity and water column denitrification in the Eastern Arabian Sea during the last glacial cycle. Marine Geology, 219(2-3), 99-108, https://doi.org/10.1016/j.margeo.2005.05.004 Ganeshram, Raja S; Pedersen, Thomas F; Calvert, Stephen E; McNeill, Gavin W; Fontugne, Michel R (2000): Glacial‐interglacial variability in denitrification in the World's Oceans: Causes and consequences. Paleoceanography, 15(4), 361-376, https://doi.org/10.1029/1999PA000422 Kessarkar, Pratima Mohan; Rao, V Purnachadra; Naqvi, Syed Wajih Ahmad; Chivas, Allan R; Saino, Toshiro (2011): Fluctuations in productivity and denitrification in the southeastern Arabian Sea during the Late Quaternary. Current Science, 99, 485-491, https://www.jstor.org/stable/24109571 Kim, Ji-Eun; Khim, Boo-Keun; Ikehara, Minoru; Lee, Jongmin (2018): Orbital-scale denitrification changes in the Eastern Arabian Sea during the last 800 kyrs. Scientific Reports, 8(1), https://doi.org/10.1038/s41598-018-25415-7 Möbius, Jürgen; Gaye, Birgit; Lahajnar, Niko; Bahlmann, Enno; Emeis, Kay-Christian (2011): Influence of diagenesis on sedimentary d15N in the Arabian Sea over the last 130 kyr. Marine Geology, 284(1-4), 127-138, https://doi.org/10.1016/j.margeo.2011.03.013 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 Arabian Sea cores, references and chronology (URI: https://download.pangaea.de/reference/139702/attachments/References_chronology.xlsx)

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993908"!

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1016/j.gloplacha.2026.105373 Orbital forcing regulated Arabian Sea denitrification during the late Pleistocene https://doi.org/10.1016/j.margeo.2005.05.004 Monsoon related changes in sea surface productivity and water column denitrification in the Eastern Arabian Sea during the last glacial cycle https://doi.org/10.1016/j.margeo.2011.03.013 Influence of diagenesis on sedimentary d15N in the Arabian Sea over the last 130 kyr https://doi.org/10.1029/1999PA000422 Glacial‐interglacial variability in denitrification in the World's Oceans: Causes and consequences https://doi.org/10.1038/s41598-018-25415-7 Orbital-scale denitrification changes in the Eastern Arabian Sea during the last 800 kyrs https://doi.org/10.25921/W9CA-1Z10 NOAA/WDS Paleoclimatology - NICOPP Global Ocean Sediment Nitrogen Isotope Database https://fr.wikipedia.org/wiki/Marion_Dufresne_(1972) Marion Dufresne (1972) https://www.jstor.org/stable/24109571 Fluctuations in productivity and denitrification in the southeastern Arabian Sea during the Late Quaternary https://www-odp.tamu.edu:443/resolutn.html Joides Resolution PANGAEA_993898 DIF 9.4 2026-04-29 2026-04-29