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 δ¹⁵N and TN records of sediment core SSD004 GC11 dataset https://doi.pangaea.de/10.1594/PANGAEA.993903 2026-04-29T10:55:05 https://doi.pangaea.de/10.1594/PANGAEA.993898 This dataset provides nitrogen isotopic composition (δ¹⁵N) and total nitrogen (TN) measurements from marine sediment core SSD004 GC11 in the southern Arabian Sea covering the last ~167 ka. The records document variability in water-column denitrification, an important control on marine nitrogen cycling and atmospheric N₂O emissions. δ¹⁵N values indicate strong coupling between primary productivity and denitrification during warm intervals, with weaker coupling during cold periods despite continued productivity linked to winter monsoon mixing. 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 78.9312 78.9312 6.0 6.0 78.9312 6.0 0.005 5.835 vertical profile Science and Engineering Research Board SERB https://doi.org/10.13039/501100001843 SRG/2021/000620 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 2333 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed [m] Depth, sediment/rock, top/minimum Depth sed top m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock http://purl.obolibrary.org/obo/ENVO_00001995 minimum Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed top [m] Depth, sediment/rock, bottom/maximum Depth sed bot m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock http://purl.obolibrary.org/obo/ENVO_00001995 maximum Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed bot [m] 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 Isotope Ratio Mass Spectrometer (IRMS) Thermo Fisher Scientific, MAT 253 Plus Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 δ15N bulk [‰ air] Nitrogen, total TN % nitrogen N https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:25555 total https://www.oxforddictionaries.com/definition/american_english/total Dimensionless Ratio ψ Isotope Ratio Mass Spectrometer (IRMS) Thermo Fisher Scientific, MAT 253 Plus Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 wt. % TN [%] Tephra/volcanic ash Tephra Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Tephra CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Arabian Sea d15N Sedimentary geochemistry Stack TN author117229 author31198 author74609 author89420 award4959 basis5402 curlevel30 event3372344 funder21066 geocode1 geocode1600 geocode1601 geocode2205 geocode8128 inst22743 journal6174 license21 method11107 method19037 param18375 param31361 param518755 param518756 param73 pi74609 ref139688 term1073092 term1073130 term1073131 term1073132 term1073135 term38253 term38263 term38492 term38548 term41019 term41056 term43794 term43863 term43975 term51409 term51567 term52549 term68617 term69323 topotype3