PANGAEA_993907 Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Western Arabian Sea Stack Singh, Dharmendra Pratap Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Western Arabian Sea Stack 2026-04-29 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993907 Investigator Dharmendra Pratap Singh dharmendra.singh@es.iitr.ac.in Earth Science AGE δ15N, bulk sediment δ15N, standard deviation geoscientificInformation 117-722 Arabian Sea Composite Core d15N Gravity corer (Kiel type) Leg117 M74/1b M74/1b_960-1 Piston corer RC27 RC27-14 RC27-23 RC27-24 RC27-61 Sedimentary geochemistry SL 167 Stack TN Stacked calculated, 1 sigma Joides Resolution Meteor (1986) Robert Conrad 1986-05-26 2007-10-02 Complete 16.6218 22.61917 57.59 59.86166 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 347 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 Altabet, Mark A; Francois, Roger; Murray, David W; Prell, Warren L (1995): Climate-related variations in denitrification in the Arabian Sea from sediment 15N/14N ratios. Nature, 373(6514), 506-509, https://doi.org/10.1038/373506a0 Altabet, Mark A; Higginson, Matthew J; Murray, David W (2002): NOAA/WDS Paleoclimatology - Arabian Sea Denitrification Data [dataset]. NOAA National Centers for Environmental Information, https://doi.org/10.25921/K2ME-E263 Altabet, Mark A; Higginson, Matthew J; Murray, David W (2002): The effect of millennial-scale changes in Arabian Sea denitrification on atmospheric CO2. Nature, 415(6868), 159-162, https://doi.org/10.1038/415159a Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Climatically linked oscillations in Arabian Sea denitrification over the past 1 m.y.: Implications for the marine N cycle. Paleoceanography, 14(6), 732-743, https://doi.org/10.1029/1999PA900035 Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Nitrogen content and isotope ratios of ODP Hole 117-722B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856637 Altabet, Mark A; Murray, David W; Prell, Warren L (1999): Nitrogen content and isotope ratios of sediment core RC27-61 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856638 Burdanowitz, Nicole; Schmiedl, Gerhard; Gaye, Birgit; Munz, Philipp; Schulz, Hartmut (2024): Nitrogen isotope record and TOC accumulation rates of sediment core GeoTü SL167 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964228 Burdanowitz, Nicole; Schmiedl, Gerhard; Gaye, Birgit; Munz, Philipp M; Schulz, Hartmut (2024): Distinct oxygenation modes of the Gulf of Oman over the past 43 000 years – a multi-proxy approach. Biogeosciences, 21(6), 1477-1499, https://doi.org/10.5194/bg-21-1477-2024 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.993907"!

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/10.1029/1999PA900035 Climatically linked oscillations in Arabian Sea denitrification over the past 1 m.y.: Implications for the marine N cycle https://doi.org/10.1038/373506a0 Climate-related variations in denitrification in the Arabian Sea from sediment 15N/14N ratios https://doi.org/10.1038/415159a The effect of millennial-scale changes in Arabian Sea denitrification on atmospheric CO2 https://doi.org/10.25921/K2ME-E263 NOAA/WDS Paleoclimatology - Arabian Sea Denitrification Data https://doi.org/10.25921/W9CA-1Z10 NOAA/WDS Paleoclimatology - NICOPP Global Ocean Sediment Nitrogen Isotope Database https://doi.org/10.5194/bg-21-1477-2024 Distinct oxygenation modes of the Gulf of Oman over the past 43 000 years – a multi-proxy approach https://doi.pangaea.de/10.1594/PANGAEA.856637 Nitrogen content and isotope ratios of ODP Hole 117-722B https://doi.pangaea.de/10.1594/PANGAEA.856638 Nitrogen content and isotope ratios of sediment core RC27-61 https://doi.pangaea.de/10.1594/PANGAEA.964228 Nitrogen isotope record and TOC accumulation rates of sediment core GeoTü SL167 https://en.wikipedia.org/wiki/RV_Meteor_(1986) Meteor (1986) https://www-odp.tamu.edu:443/resolutn.html Joides Resolution PANGAEA_993898 DIF 9.4 2026-04-29 2026-04-29