https://doi.pangaea.de/10.1594/PANGAEA.993900Samin, EmmaEmmaSaminUniversité Paris-SaclayLandais, AmaëlleAmaëlleLandais0000-0002-5620-5465Université Paris-SaclayFourré, EliseEliseFourréUniversité Paris-SaclayCombacal, ThomasThomasCombacalUniversité Paris-SaclayMinster, BénédicteBénédicteMinsterUniversité Paris-SaclayGautier, ElsaElsaGautier0000-0003-3053-8349Grenoble Alpes UniversityJossoud, OlivierOlivierJossoudUniversité Paris-SaclayJacob, RoxanneRoxanneJacobGrenoble Alpes UniversityOrsi, AnaïsAnaïsOrsi0000-0001-5511-3940University of British ColumbiaPossenti, PhilippePhilippePossentiGrenoble Alpes UniversityAlemany, OlivierOlivierAlemanyGrenoble Alpes UniversityPANGAEA2026chemistryfirn coreLittle Dome CEvent labelLATITUDELONGITUDEDEPTH, ice/snowDepth, ice/snow, top/minimumDepth, ice/snow, bottom/maximumSulfateCommentIce corer2023-01-06T00:00:00/2023-01-17T00:00:00Dataset10.5194/egusphere-2026-871https://doi.pangaea.de/10.1594/PANGAEA.993899https://doi.pangaea.de/10.1594/PANGAEA.993901https://doi.pangaea.de/10.1594/PANGAEA.99390215840 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)In preparation for the deep drilling of the Beyond Epica Oldest Ice deep ice core, surface cores were drilled at Little Dome C drilling site to characterise how the climate signal is recorded in the firn. The ICORDA-LDC firn core (75°17.586 S, 122°24.808 E) was drilled in January 2023. We present the sulphate measurements obtained by ion chromatography on the core sample in 2024 at the Laboratory of Climate and Environmental Sciences (Saclay, France).122.41346666666236-75.29321666667086Little Dome CCentre National de la Recherche Scientifiquehttps://doi.org/10.13039/501100004794PROXYNNOVCNRS LEFE PROXYNNOVEuropean Research Councilhttps://doi.org/10.13039/5011000007811250ICORDA-KATABATICEuropean Research Councilhttps://doi.org/10.13039/501100000781817493ICORDA - Ice CORe DAting tools revisited to infer the dynamic of glacial – interglacial transitions over the last 1.5 million yearsHorizon 2020https://doi.org/10.13039/501100007601815384Beyond EPICA