High-resolution hydrogen peroxide data of firn core OH-12 from Plateau Laclavere, northern Antarctic Peninsula@en

The firn core OH-12 was retrieved from Plateau Laclavere, a small ice cap on the northernmost end of the Antarctic Peninsula at about 1090 m above sea level in January 2016. The core was drilled down to 19.93 m depth. Subsamples for stable water isotope analysis were obtained from the core at 5 cm resolution. Glacio-chemical parameters (hydrogen peroxide, sulphur, sodium, black carbon) were determined in summer 2017 using a Continuous Flow Analysis (CFA) system as described by Röthlisberger et al. (2000) and McConnell et al. (2002, 2007). The core was dated using annual layer counting of hydrogen peroxide measurements. We additionally accounted for precipitation intermittency at the drill site by using precipitation data from the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA5 Reanalysis extracted from the grid point closest to the firn-core drill site. The core covers the period from July 2011 to January 2016. The data has been used for investigating recent climate and environmental changes in the northern Antarctic Peninsula region providing the basis for the retrieval and analysis of a deeper ice core from the same site.2016年1月，我们从南极半岛最北端的拉克拉维尔高原（Plateau Laclavere）采集了粒雪芯（firn core）OH-12；该高原为小型冰盖，海拔约1090米。该粒雪芯的钻探深度达19.93米。为开展稳定水同位素分析，我们以5厘米的采样分辨率从该粒雪芯中获取分样试样。冰川化学参数（过氧化氢、硫、钠、黑碳）于2017年夏季通过连续流分析系统（Continuous Flow Analysis, CFA）完成测定，测定方法参照Röthlisberger等（2000）及McConnell等（2002、2007）的研究方案。该粒雪芯的年代通过过氧化氢测定的年层计数法确定。此外，我们借助取自距该粒雪芯钻探点最近格点的欧洲中期天气预报中心（European Centre for Medium-Range Weather Forecasts, ECMWF）ERA5再分析数据集，校正了钻探点的降水间歇性效应。该粒雪芯的时间覆盖范围为2011年7月至2016年1月。本数据集已用于探究南极半岛北部区域的近期气候与环境变化，同时为同一地点更深层冰芯的采集与分析提供了研究基础。