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, Arabian Sea Stack dataset https://doi.pangaea.de/10.1594/PANGAEA.993904 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 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 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 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 Isaji Yuta Kawahata Hodaka kawahata@aori.u-tokyo.ac.jp 0000-0003-4236-7356 Ohkouchi Naohiko nohkouchi@jamstec.go.jp 0000-0002-6355-7469 Ogawa Nanako O 0000-0002-3823-6444 Murayama Masafumi murayama@kochi-u.ac.jp Inoue Kazuki Tamaki Kensaku 2015 Varying responses to I ndian monsoons during the past 220 kyr recorded in deep‐sea sediments in inner and outer regions of the G ulf of A den journal article Journal of Geophysical Research: Oceans 120(11) https://doi.org/10.1002/2015JC010982 7253-7270 Ivanochko Tara S Ganeshram Raja S Brummer Geert-Jan A geert-jan.brummer@nioz.nl 0000-0003-4145-1281 Ganssen Gerald M gerald.ganssen@falw.vu.nl Jung S J A Moreton Stephen Kroon Dick dick.kroon@ed.ac.uk 2005 Variations in tropical convection as an amplifier of global climate change at the millennial scale journal article Earth and Planetary Science Letters 235(1-2) https://doi.org/10.1016/j.epsl.2005.04.002 302-314 Jaeschke Andrea andrea.jaeschke@uni-koeln.de 0000-0003-2518-2739 Ziegler Martin M.Ziegler@uu.nl 0000-0003-3198-6434 Hopmans Ellen C ellen.hopmans@nioz.nl 0000-0002-8209-1334 Reichart Gert-Jan Gert-Jan.Reichart@nioz.nl 0000-0002-7256-2243 Lourens Lucas Joost llourens@geo.uu.nl 0000-0002-3815-7770 Schouten Stefan Stefan.Schouten@nioz.nl Sinninghe Damsté Jaap S jaap.damste@nioz.nl 0000-0002-8683-1854 2009 Figure 4. Geochemistry on sediment core MD04-2879 dataset https://doi.org/10.1594/PANGAEA.742495 Jaeschke Andrea andrea.jaeschke@uni-koeln.de 0000-0003-2518-2739 Ziegler Martin M.Ziegler@uu.nl 0000-0003-3198-6434 Hopmans Ellen C ellen.hopmans@nioz.nl 0000-0002-8209-1334 Reichart Gert-Jan Gert-Jan.Reichart@nioz.nl 0000-0002-7256-2243 Lourens Lucas Joost llourens@geo.uu.nl 0000-0002-3815-7770 Schouten Stefan Stefan.Schouten@nioz.nl Sinninghe Damsté Jaap S jaap.damste@nioz.nl 0000-0002-8683-1854 2009 Molecular fossil evidence for anaerobic ammonium oxidation in the Arabian Sea over the last glacial cycle journal article Paleoceanography 24(2) https://doi.org/10.1029/2008PA001712 PA2202 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 Pichevin Laetitia laetitia.pichevin@ed.ac.uk 0000-0003-2685-6926 Bard Edouard bard@cerege.fr 0000-0002-7237-8622 Martinez Philippe 0000-0002-9825-2032 Billy Isabelle 2007 Biogeochemical investigations on sediment core MD04-2876 dataset publication series https://doi.org/10.1594/PANGAEA.727157 Pichevin Laetitia laetitia.pichevin@ed.ac.uk 0000-0003-2685-6926 Bard Edouard bard@cerege.fr 0000-0002-7237-8622 Martinez Philippe 0000-0002-9825-2032 Billy Isabelle 2007 Evidence of ventilation changes in the Arabian Sea during the late Quaternary: Implication for denitrification and nitrous oxide emission journal article Global Biogeochemical Cycles 21 https://doi.org/10.1029/2006GB002852 GB4008 Reichart Gert-Jan Gert-Jan.Reichart@nioz.nl 0000-0002-7256-2243 Lourens Lucas Joost llourens@geo.uu.nl 0000-0002-3815-7770 Zachariasse Willem-Jan 1998 Organic carbon content, stable isotopes and planktonic foraminifera in sediments of tghe norther Arabian Sea oxygen minimum zone dataset publication series https://doi.org/10.1594/PANGAEA.857398 Reichart Gert-Jan Gert-Jan.Reichart@nioz.nl 0000-0002-7256-2243 Lourens Lucas Joost llourens@geo.uu.nl 0000-0002-3815-7770 Zachariasse Willem-Jan 1998 Temporal variability in the northern Arabian Sea oxygen minimum zone (OMZ) during the last 225,000 years journal article Paleoceanography 13(6) https://doi.org/10.1029/98PA02203 607-621 Suthhof Andreas Ittekkot Venugopalan ittekkot@dkrz.de 0000-0003-2667-5068 Gaye-Haake Birgit haake@geowiss.uni-hamburg.de 2001 Millennial‐scale oscillation of denitrification intensity in the Arabian Sea during the Late Quaternary and its potential influence on atmospheric N 2 O and global climate journal article Global Biogeochemical Cycles 15(3) https://doi.org/10.1029/2000GB001337 637-649 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 Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 Ramesh R Bhushan Ravi bhushan@prl.res.in 0000-0003-1347-5446 Sheshshayee Madavalm S Somayajulu Bammidipati L K Jull A J Timothy 0000-0002-4079-4947 Burr George S 0000-0003-0068-7589 2010 Did the Indo‐Asian summer monsoon decrease during the Holocene following insolation? journal article Journal of Quaternary Science 25(7) https://doi.org/10.1002/jqs.1398 1179-1188 46.9323 78.9312 6.0 24.84283 62.63104144913045 17.14831623173913 1976-01-01T00:00:00 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 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 GOA4 12.8215 46.9323 -1474.0 Sediment corer SEDCO GOA6 14.983 53.767 -2416.0 Sediment corer SEDCO 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 MD04-2876 24.84283 64.00816 Pakistan continental margin -828.0 MD143 MD143 CHAMAK CHAMAK http://www.ifremer.fr/sismer/UK/catal/campagne/campagnea.htql?crno=4200250 2004-09-22T00:00:00 2004-09-22 2004-10-16T00:00:00 2004-10-16 Marion Dufresne (1995) https://en.wikipedia.org/wiki/Marion_Dufresne_(1994) FNIN 9050814 Lallemant, S Lallemant, S Marion Dufresne (1995) https://en.wikipedia.org/wiki/Marion_Dufresne_(1994) FNIN 9050814 Calypso Corer CALYPSO 33 m located within the present day OMZ (oxygen minimum zone) MD04-2879CQ 22.5483 64.0467 Gulf of Oman -920.0 2004-09-21T00:00:00 MD143 MD143 CHAMAK CHAMAK http://www.ifremer.fr/sismer/UK/catal/campagne/campagnea.htql?crno=4200250 2004-09-22T00:00:00 2004-09-22 2004-10-16T00:00:00 2004-10-16 Marion Dufresne (1995) https://en.wikipedia.org/wiki/Marion_Dufresne_(1994) FNIN 9050814 Lallemant, S Lallemant, S Marion Dufresne (1995) https://en.wikipedia.org/wiki/Marion_Dufresne_(1994) FNIN 9050814 Calypso square corer CASQ 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 ME33-NAST 19.999 65.684 -3167.0 Sediment corer SEDCO NIOP_905 10.92 51.94 Arabian Sea NIOP-D2_455-1 23.55667 65.95 Arabian Sea -1002.0 1992-10-06T00:00:00 NIOP-D2 NIOP-D2 1992-10-04T00:00:00 1992-10-04 1992-10-25T00:00:00 1992-10-25 Tyro van der Linden, W J M van der Linden, W J M Netherlands Indian Ocean Programme Tyro Piston corer PC NIOP-D2_464-1 22.25667 63.585 Arabian Sea -1470.0 1992-10-15T00:00:00 NIOP-D2 NIOP-D2 1992-10-04T00:00:00 1992-10-04 1992-10-25T00:00:00 1992-10-25 Tyro van der Linden, W J M van der Linden, W J M Netherlands Indian Ocean Programme Tyro Piston corer PC 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 SK117_GC_08 15.483 72.85 -2500.0 Sediment corer SEDCO SK126-GC39 12.63 73.33 -1940.0 SO42-74KL KL-74, AS-12 14.321 57.347 Arabian Sea -3212.0 1986-05-24T00:00:00 SO42 SO42 1986-04-29T00:00:00 1986-04-29 1986-05-27T00:00:00 1986-05-27 Sonne https://en.wikipedia.org/wiki/RV_Sonne DFCG 6909777 Ittekkot, Venugopalan Ittekkot, Venugopalan doi:10.48433/cr_so42 20140114 Sedimentationsprozesse Arabisches Meer Sonne https://en.wikipedia.org/wiki/RV_Sonne DFCG 6909777 Kasten corer KAL 3.16 m SO90_111KL 23.096 66.483 Arabian Sea -775.0 1993-09-19T00:00:00 SO90 SO90 PAKOMIN PAKOMIN Karachi, Pakistan 1993-08-30T00:00:00 1993-08-30 Karachi, Pakistan 1993-10-05T00:00:00 1993-10-05 Sonne https://en.wikipedia.org/wiki/RV_Sonne DFCG 6909777 von Rad, Ulrich von Rad, Ulrich doi:10.2312/cr_so90 19940030 PAKOMIN Sonne https://en.wikipedia.org/wiki/RV_Sonne DFCG 6909777 Piston corer (BGR type) KL 14.45 m GPS, SS4018G 13.38 53.257 -2830.0 Sediment corer SEDCO SSD004_GC11 6.0 78.9312 -2901.0 Sindhu Sadhana https://www.nio.res.in/research/research-vessels/rv-sindhu-sadhana AVCO 9608855 Gravity corer GC 350 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 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 author10512 author10849 author10930 author117229 author117236 author117237 author117238 author117239 author20292 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