https://doi.pangaea.de/10.1594/PANGAEA.995091Penny, ClaireClairePenny0000-0001-9879-9006Durham UniversityBentley, Michael JMichael JBentley0000-0002-2048-0019Durham UniversityHodgson, Dominic ADominic AHodgsonDurham UniversityGröcke, Darren RDarren RGröcke0000-0003-2296-7530Durham UniversityGraham, AliceAliceGrahamDurham UniversityMcClymont, Erin LErin LMcClymont0000-0003-1562-8768Durham UniversityPANGAEA2026Antarcticafatty acidsfatty alcoholspalaeoclimate reconstructionStable carbon isotope (δ13C)stable nitrogen isotope (δ15N)stomach oil depositsWeddell Sea2015-01-14T00:00:00Bundled Publication of Datasets10.1017/S09541020261006626 datasetsapplication/zipCreative Commons Attribution 4.0 InternationalWe present a multi-proxy dataset from a snow petrel stomach-oil deposit, 1401MUM1, from the Theron Mountains (-79.049, -28.329), eastern Weddell Sea region. 1401MUM1 was collected as part of a NERC-funded expedition (2015) from the Theron Mountains, a mountain range in Coats Land. The aim of the analysis is to investigate snow petrel diet during the last 2 ka (late Holocene) and in turn to infer changing sea-ice conditions in the eastern Weddell Sea sector of the Southern Ocean (Penny et al. Antarctic Science, submitted). The data includes results from lipid biomarker analysis (fatty acids, sterols and fatty alcohols), bulk stable isotope compositions (δ¹³C and δ¹⁵N) (Department of Geography, Durham University, Durham, U.K) and non-destructive XRF trace element concentrations (GeoTek Core Scanner, Department of Geography, Durham University, Durham, U.K). The age-depth model is constrained by eight new radiocarbon dates (SUERC - Centre for the Isotope Sciences, University of Glasgow, Glasgow, U.K; University of California-Irvine, California, U.S.A).-28.261999999999983-79.03900000000003Horizon 2020https://doi.org/10.13039/501100007601864637ANTarctic Sea Ice Evolution from a novel biological archive (ANTSIE)Leverhulme Trusthttps://doi.org/10.13039/501100000275RL-2019-023Unlocking evidence for Antarctic sea-ice evolution from a novel biological archive, Web: , Award: Philip Leverhulme Research Leadership Award,Natural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/K003674/1Reducing the uncertainty in estimates of the sea level contribution from the westernmost part of the East Antarctic Ice Sheet