Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 2026 Basin-scale Arabian Sea denitrification reconstruction based on δ¹⁵N records, Western Arabian Sea Stack dataset https://doi.pangaea.de/10.1594/PANGAEA.993907 2026-04-29T10:55:05 https://doi.pangaea.de/10.1594/PANGAEA.993898 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. Pawar Rahul Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Saraswat Rajeev rsaraswat@nio.org 0000-0003-2110-2578 Maurya A S 2026 Orbital forcing regulated Arabian Sea denitrification during the late Pleistocene journal article Global and Planetary Change 259 https://doi.org/10.1016/j.gloplacha.2026.105373 105373 Altabet Mark A maltabet@umassd.edu 0000-0003-3120-0710 Francois Roger rfrancois@whoi.edu Murray David W David_Murray@Brown.EDU Prell Warren L warren_prell@brown.edu 1995 Climate-related variations in denitrification in the Arabian Sea from sediment 15N/14N ratios journal article Nature 373(6514) https://doi.org/10.1038/373506a0 506-509 Altabet Mark A maltabet@umassd.edu 0000-0003-3120-0710 Higginson Matthew J Murray David W David_Murray@Brown.EDU 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 maltabet@umassd.edu 0000-0003-3120-0710 Higginson Matthew J Murray David W David_Murray@Brown.EDU 2002 The effect of millennial-scale changes in Arabian Sea denitrification on atmospheric CO2 journal article Nature 415(6868) https://doi.org/10.1038/415159a 159-162 Altabet Mark A maltabet@umassd.edu 0000-0003-3120-0710 Murray David W David_Murray@Brown.EDU Prell Warren L warren_prell@brown.edu 1999 Climatically linked oscillations in Arabian Sea denitrification over the past 1 m.y.: Implications for the marine N cycle journal article Paleoceanography 14(6) https://doi.org/10.1029/1999PA900035 732-743 Altabet Mark A maltabet@umassd.edu 0000-0003-3120-0710 Murray David W David_Murray@Brown.EDU Prell Warren L warren_prell@brown.edu 1999 Nitrogen content and isotope ratios of ODP Hole 117-722B dataset https://doi.org/10.1594/PANGAEA.856637 Altabet Mark A maltabet@umassd.edu 0000-0003-3120-0710 Murray David W David_Murray@Brown.EDU Prell Warren L warren_prell@brown.edu 1999 Nitrogen content and isotope ratios of sediment core RC27-61 dataset https://doi.org/10.1594/PANGAEA.856638 Burdanowitz Nicole nicole.burdanowitz@uni-hamburg.de 0000-0001-9922-1863 Schmiedl Gerhard gerhard.schmiedl@uni-hamburg.de 0000-0002-2177-6858 Gaye Birgit birgit.gaye@uni-hamburg.de 0000-0002-5057-899X Munz Philipp Philipp.Munz@villingen-schwenningen.de 0000-0002-3149-0546 Schulz Hartmut hartmut.schulz@uni-tuebingen.de https://www.uni-tuebingen.de/en/faculties/faculty-of-science/departments/geosciences/arbeitsgruppen/palaeobiology/research-area/micropaleontology/working-group/members/hartmut-schulz.html 2024 Nitrogen isotope record and TOC accumulation rates of sediment core GeoTü SL167 dataset https://doi.org/10.1594/PANGAEA.964228 Burdanowitz Nicole nicole.burdanowitz@uni-hamburg.de 0000-0001-9922-1863 Schmiedl Gerhard gerhard.schmiedl@uni-hamburg.de 0000-0002-2177-6858 Gaye Birgit birgit.gaye@uni-hamburg.de 0000-0002-5057-899X Munz Philipp M munz@mailbox.org Schulz Hartmut hartmut.schulz@uni-tuebingen.de https://www.uni-tuebingen.de/en/faculties/faculty-of-science/departments/geosciences/arbeitsgruppen/palaeobiology/research-area/micropaleontology/working-group/members/hartmut-schulz.html 2024 Distinct oxygenation modes of the Gulf of Oman over the past 43 000 years – a multi-proxy approach journal article Biogeosciences 21(6) https://doi.org/10.5194/bg-21-1477-2024 1477-1499 Tesdal J-E Galbraith Eric Douglas eric.galbraith@mcgill.ca 0000-0003-4476-4232 Kienast Markus markus.kienast@dal.ca 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 https://download.pangaea.de/reference/139702/attachments/References_chronology.xlsx 57.59 59.86166 16.6218 22.61917 58.73557666666667 18.304995 1986-05-26T00:00:00 2007-10-02T21:32:00 -4040.0 -455.0 vertical profile Science and Engineering Research Board SERB https://doi.org/10.13039/501100001843 SRG/2021/000620 117-722 16.6218 59.7953 Arabian Sea -2033.5 1987-09-07T00:00:00 1987-09-13T00:00:00 Leg117 Leg117 1987-08-19T00:00:00 1987-08-19 1987-10-17T00:00:00 1987-10-17 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Prell, Warren L Prell, Warren L Niitsuma, Nobuaki Niitsuma, Nobuaki doi:10.2973/odp.proc.ir.117.1989 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Composite Core COMPCORE 845.6 m 611.8 m 88 cores; 845.1 m cored; 0 m drilled; 72.4% recovery M74/1b_960-1 SL 167 22.61917 59.6915 Oman Margin -774.0 2007-10-02T21:32:00 M74/1b M74/1b Fujayrah Harbor, United Arab Emirates 2007-09-19T00:00:00 2007-09-19 Fujayrah Harbor, United Arab Emirates 2007-10-04T00:00:00 2007-10-04 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Gaye-Haake, Birgit Gaye-Haake, Birgit doi:10.2312/cr_m74 20080023 hdl:10013/epic.44784.d026 hdl:10013/epic.44803.d103 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Gravity corer (Kiel type) SL 7.40 m RC27-14 18.253 57.655 Indian Ocean -4040.0 1986-05-26T00:00:00 RC27 RC27 1986-05-06T00:00:00 1986-05-06 1986-06-07T00:00:00 1986-06-07 Robert Conrad Robert Conrad Piston corer PC 10.85 m RC27-23 17.993 57.59 Indian Ocean -2225.0 1986-05-27T00:00:00 RC27 RC27 1986-05-06T00:00:00 1986-05-06 1986-06-07T00:00:00 1986-06-07 Robert Conrad Robert Conrad Piston corer PC 10.78 m RC27-24 17.718 57.82 Indian Ocean -1416.0 1986-05-27T00:00:00 RC27 RC27 1986-05-06T00:00:00 1986-05-06 1986-06-07T00:00:00 1986-06-07 Robert Conrad Robert Conrad Piston corer PC 11.62 m depth not available RC27-61 16.625 59.86166 Indian Ocean -455.0 1986-06-07T00:00:00 RC27 RC27 1986-05-06T00:00:00 1986-05-06 1986-06-07T00:00:00 1986-06-07 Robert Conrad Robert Conrad Piston corer PC 11.2 m 347 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Age [ka BP] δ15N, bulk sediment δ15N bulk ‰ air δ15N http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Stacked Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Western Arabian Sea Stack δ15N bulk [‰ air] δ15N, standard deviation δ15N std dev ± δ15N http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation calculated, 1 sigma Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 δ15N std dev [±] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Arabian Sea d15N Sedimentary geochemistry Stack TN author104689 author10849 author117229 author117239 author21697 author22299 author249 author31198 author32282 author34580 author35695 author53 author53261 author63706 author692 author74609 author770 author89420 award4959 basis2 basis21 basis5 campaign32948 campaign3372728 campaign3384071 campaign3397806 campaign342 campaign89 curlevel30 event17651 event17659 event17660 event2074700 event2835910 event66858 funder21066 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst22743 journal11658 journal12511 journal2146 journal6174 license21 method10655 method10895 method11108 method13010 method620 param31361 param75382 pi74609 ref123958 ref139688 ref139696 ref139697 ref139699 ref139700 ref139702 ref78758 refds856637 refds856638 refds964228 term1073092 term1073135 term20573 term20611 term20612 term37764 term43975 term51409 term51567 term52549 term68617 term69323 term77870 topotype3