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, Southern Arabian Sea Stack dataset https://doi.pangaea.de/10.1594/PANGAEA.993906 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 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 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 Arabian Sea cores, references and chronology https://download.pangaea.de/reference/139702/attachments/References_chronology.xlsx 46.9323 78.9312 6.0 14.983 57.029083333333325 12.070916666666667 1986-05-24T00:00:00 1986-05-24T00:00:00 -3212.0 -1474.0 vertical profile Science and Engineering Research Board SERB https://doi.org/10.13039/501100001843 SRG/2021/000620 GOA4 12.8215 46.9323 -1474.0 Sediment corer SEDCO GOA6 14.983 53.767 -2416.0 Sediment corer SEDCO NIOP_905 10.92 51.94 Arabian Sea 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 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 349 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 Southern 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 author10512 author117229 author117236 author117237 author117239 author21691 author21697 author22894 author23143 author24736 author25909 author26933 author28322 author29438 author29439 author29440 author31198 author31772 author326 author34580 author35898 author37507 author40719 author48112 author543 author66678 author733 author73578 author74609 author876 author89420 award4959 basis4 basis5402 campaign10099 campaign3392290 curlevel30 event2924700 event3372344 event3397900 event3397901 event3397904 event50585 funder21066 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst22743 journal4644 journal6174 journal6175 journal8822 journal9634 license21 method11107 method11208 method12022 method13010 method620 param31361 param75382 pi74609 ref139688 ref139691 ref139692 ref139694 ref139695 ref139699 ref139702 term1073092 term1073135 term20612 term37764 term43975 term51409 term51567 term52549 term68617 term69323 topotype3