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, Eastern Arabian Sea Stack dataset https://doi.pangaea.de/10.1594/PANGAEA.993908 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 Banakar Virupaxa K banakar@nio.org Oba Tadamichi oba-tad@ees.hokudai.ac.jp Chodankar A R Kuramoto Takayuki 0000-0002-3044-8127 Yamamoto Masanobu myama@ees.hokudai.ac.jp 0000-0003-1312-825X Minagawa Masao 2005 Monsoon related changes in sea surface productivity and water column denitrification in the Eastern Arabian Sea during the last glacial cycle journal article Marine Geology 219(2-3) https://doi.org/10.1016/j.margeo.2005.05.004 99-108 Ganeshram Raja S Pedersen Thomas F tfp@uvic.ca Calvert Stephen E calvert@eos.ubc.ca McNeill Gavin W Fontugne Michel R 2000 Glacial‐interglacial variability in denitrification in the World's Oceans: Causes and consequences journal article Paleoceanography 15(4) https://doi.org/10.1029/1999PA000422 361-376 Kessarkar Pratima Mohan Rao V Purnachadra Naqvi Syed Wajih Ahmad naqvi@csnio.ren.nic.in 0000-0003-1400-6596 Chivas Allan R toschi@uow.edu.au 0000-0002-1459-6330 Saino Toshiro tsaino@ihas.nagoya-u.ac.jp 2011 Fluctuations in productivity and denitrification in the southeastern Arabian Sea during the Late Quaternary journal article Current Science 99 https://www.jstor.org/stable/24109571 485-491 Kim Ji-Eun kim.6501@osu.edu 0000-0002-7668-5072 Khim Boo-Keun bkkhim@pusan.ac.kr Ikehara Minoru ikehara@kochi-u.ac.jp 0000-0002-2695-4713 Lee Jongmin 2018 Orbital-scale denitrification changes in the Eastern Arabian Sea during the last 800 kyrs journal article Scientific Reports 8(1) https://doi.org/10.1038/s41598-018-25415-7 Möbius Jürgen juergen.moebius@zmaw.de Gaye Birgit birgit.gaye@uni-hamburg.de 0000-0002-5057-899X Lahajnar Niko niko.lahajnar@uni-hamburg.de Bahlmann Enno Emeis Kay-Christian kay.emeis@uni-hamburg.de 0000-0003-0459-913X 2011 Influence of diagenesis on sedimentary d15N in the Arabian Sea over the last 130 kyr journal article Marine Geology 284(1-4) https://doi.org/10.1016/j.margeo.2011.03.013 127-138 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 68.582 73.33 12.63 16.62133333 71.233826666 15.171266666 1976-01-01T00:00:00 1976-01-01T00:00:00 -3820.0 -1230.0 vertical profile Science and Engineering Research Board SERB https://doi.org/10.13039/501100001843 SRG/2021/000620 355-U1456 16.62133333 68.83883333 -3640.0 Exp355 Exp355 2015-03-31T00:00:00 2015-03-31 2015-05-31T00:00:00 2015-05-31 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Pandey, Dhananjai K Pandey, Dhananjai K Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Composite Core COMPCORE MD76-131 15.53 72.5683 Indian Ocean -1230.0 1976-01-01T00:00:00 MD10 MD10 OSIRIS II OSIRIS II 1976-06-14T00:00:00 1976-06-14 1976-07-18T00:00:00 1976-07-18 Marion Dufresne (1972) https://fr.wikipedia.org/wiki/Marion_Dufresne_(1972) Duplessy, Jean-Claude Duplessy, Jean-Claude Marion Dufresne (1972) https://fr.wikipedia.org/wiki/Marion_Dufresne_(1972) Piston corer PC 9.5 m ME33-EAST 15.592 68.582 -3820.0 Sediment corer SEDCO SK117_GC_08 15.483 72.85 -2500.0 Sediment corer SEDCO SK126-GC39 12.63 73.33 -1940.0 284 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 Eastern 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 author117229 author117238 author117239 author20292 author20312 author21559 author21574 author21697 author21722 author21724 author22220 author27510 author28304 author29439 author30511 author31198 author32282 author33938 author34020 author34580 author38281 author38847 author45415 author49395 author49396 author545 author56129 author634 author73788 author73789 author74609 author89420 award4959 basis5 basis5348 campaign10137 campaign3376327 campaign3389694 campaign45654 curlevel30 event2882817 event3017362 event3397902 event3397954 event51282 funder21066 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst22743 journal10819 journal12511 journal16727 journal4269 journal6174 license21 method10655 method10895 method12022 method13010 method620 param31361 param75382 pi74609 ref103070 ref113473 ref139688 ref139693 ref139698 ref139699 ref139702 ref37014 term1073092 term1073135 term20611 term37764 term43975 term51409 term51567 term52549 term68617 term69323 topotype3