Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 Nagoji Sidhesh nagojisidd@gmail.com 2021 Centennial scale denitrification variability based on isotopic and geochemical proxies from the Arabian Sea since the last glacial period dataset https://doi.org/10.1594/PANGAEA.930736 2021-04-23T09:33:20 Isotopic (nitrogen and carbon isotope ratio of sedimentary organic matter), geochemical (total organic carbon and total nitrogen content of sediment), and micropaleontological (Globigerina bulloides abundance) analyses were done in samples from a marine sediment core. This gravity-core was collected during the 274th cruise of the ORV Sagar Kanya from the Southeastern Arabian Sea. The chronology of the core is based on nine radiocarbon dates obtained using two species of planktic foraminifera (Globigerinoides ruber, Globigerinoides sacculifer; size range: 250–420 μm). It spans the last ~ 43 thousand years and the average resolution is ~150 years. For total organic carbon concentration and carbon isotope ratio estimation, carbonate was removed by treating the sample with 2N hydrochloric acid for 16 hours followed by centrifuging. Given the known problems of loss of nitrogen compounds from the sedimentary organic matter on acidification of samples, resulting in a bias in nitrogen content and nitrogen isotope ratios, untreated samples were used for their analysis. This data was used to study centennial-scale denitrification and productivity variability from the Southeastern Arabian Sea. Nagoji Sidhesh nagojisidd@gmail.com Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 2021 Causes and Climatic Influence of Centennial Scale Denitrification Variability in the Southeastern Arabian Sea since the Last Glacial Period journal article Quaternary Research https://doi.org/10.1017/qua.2020.118 1-13 72.0 72.0 13.98333 13.98333 72.0 13.98333 -1290.0 -1290.0 vertical profile SK274-4G 13.98333 72.0 Arabian Sea -1290.0 SK274 SK274 2010-07-07T00:00:00 2010-07-07 2010-08-07T00:00:00 2010-08-07 Sagar Kanya Alappattu, Denny P Alappattu, Denny P Sagar Kanya Gravity corer GC 1280 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 Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 Age [ka BP] Carbon, organic, total TOC % carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 organic total https://www.oxforddictionaries.com/definition/american_english/total Dimensionless Ratio ψ Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 TOC [%] δ13C, total organic carbon δ13C TOC ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes total organic carbon TOC Isotope Ratio Mass Spectrometer, IsoPrime Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 vs. VPDB δ13C TOC [‰ PDB] 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 Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 TN [%] δ15N δ15N ‰ air δ15N http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Isotope Ratio Mass Spectrometer, IsoPrime Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 δ15N [‰ air] Carbon/Nitrogen ratio C/N carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 nitrogen N https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:25555 ratio Tiwari Manish manish@ncpor.res.in 0000-0003-3143-1658 atomic C/N CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Arabian Sea Carbon isotopes Denitrification Foraminifera abundance G. bulloides geochemical archives global Monsoons nitrogen isotope organic carbon (OC) Paleoceanography paleoclimatology Quaternary Stable isotopes Teleconnection ventilation author35898 author81295 basis380 campaign3373991 campaign47837 curlevel30 event2969318 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 journal13623 license21 method11107 method12944 param15427 param1547 param178882 param67 param73 pi35898 ref108150 term1073089 term1073092 term1073135 term20612 term2663825 term2687803 term2687804 term38253 term38303 term38477 term38548 term428 term43794 term43975 term44419 term47129 term47466 term47997 term48291 term49276 term496 term51409 term52153 term52397 term52700 term53863 term672 term680 topotype3