Bulk organic carbon and nitrogen characteristics of an Antarctic snow petrel stomach oil deposit

Organic geochemistry, stable isotope analysis and elemental scans are presented here from a stomach-oil deposit collected at Heimefrontfjella Range, Dronning Maud Land, East Antarctica. Stomach-oil deposit 3012MUM2 was collected in season 2014–15 from the Boysennuten nunatak in the Heimefrontfjella Range of East Antarctica (74° 34.14'S; 11° 15.02'W). The aim of the analysis is to investigate snow petrel diet during the Holocene and in turn to infer changing sea-ice conditions in the Weddell Sea and South Atlantic sector of the Southern Ocean (Stevenson et al., Climate of the Past Discussions). The data include results from non-destructive XRF scanning, fatty acid distributions and other biomarkers of productivity and diet (Department of Geography, Durham University, Durham, U.K.) and bulk stable carbon and nitrogen isotope ratios (Department of Earth Sciences, Durham University, Durham, U.K.). The age-depth model is constrained by 12 new bulk radiocarbon measurements (Beta Analytic Inc., Miami; SUERC, Glasgow).

本数据集包含从东南极洲毛德皇后地（Dronning Maud Land）海姆弗龙特山（Heimefrontfjella Range）采集的胃油沉积物的有机地球化学、稳定同位素分析与元素扫描数据。本次研究的胃油沉积物样品3012MUM2采集于2014-2015年度，采集点位为东南极洲海姆弗龙特山范围内的博伊森努滕冰原岛峰（Boysennuten nunatak），地理坐标为南纬74°34.14′、西经11°15.02′。本分析的研究目标为探究全新世期间雪鹱的食性，进而推断威德尔海（Weddell Sea）与南大洋南大西洋扇区的海冰变化情况（Stevenson等，《Climate of the Past Discussions》）。本数据集包含以下分析结果：无损X射线荧光（XRF）扫描数据、脂肪酸分布及其他反映生产力与食性的生物标志物数据（英国杜伦大学地理系提供），以及总碳、氮稳定同位素比值数据（英国杜伦大学地球科学系提供）。本次研究的年龄-深度模型由12组新的全样放射性碳测年数据约束，测年工作由迈阿密的贝塔分析公司（Beta Analytic Inc.）与格拉斯哥的SUERC完成。