Gas properties at core depth 1.95 m in ice cores from Larsen blue ice area, East Antarctica

Blue ice areas (BIAs) have several advantages for reconstructing past climate. However, the complicated ice flow in the areas hinders constraining the age. We apply state-of-the-art techniques and show that the ages cover the last deglaciation for Larsen BIA. Our study demonstrates that Larsen BIA in Northern Victoria Land helps in reconstructing the past climate during the last deglaciation. This data set presents gas composition (CO2, CH4, N2O, δ18Oatm, δ15N-N2, δO2/N2, δAr/N2), stable water isotopes (δ2Hice, δ18Oice), and the chronology of Larsen BIA. The ice cores were collected in January 2019 in Northern Victoria Land, East Antarctica. Gas composition analysis was conducted at Seoul National University and National Institute of Polar Research. Stable water isotopes were analyzed at Korea Polar Research Institute. Data sets were also published as a supplement of Lee et al. (2022) titled with “Chronostratigraphy of Larsen blue ice area in Northern Victoria Land, East Antarctica, and its implications for paleoclimate”, The Cryosphere.

蓝冰区域（Blue Ice Areas, BIAs）在古气候重建领域具备显著优势。但该区域复杂的冰流动力学过程，制约了其沉积年代的精准厘定。本研究采用当前国际先进的技术手段，证实东南极洲维多利亚地北部的拉森蓝冰区域（Larsen BIA）的年代覆盖末次冰消期。研究表明，该区域可为末次冰消期的古气候重建提供关键支撑。本数据集涵盖拉森蓝冰区域的气体组分数据（包括CO₂、CH₄、N₂O、大气δ¹⁸O、δ¹⁵N-N₂、δO₂/N₂、δAr/N₂）、稳定水同位素数据（冰样δ²H、δ¹⁸O）以及年代序列信息。所有冰芯于2019年1月在东南极洲维多利亚地北部采集完成。气体组分分析工作在首尔国立大学与日本极地研究所开展；稳定水同位素分析则由韩国极地研究所完成。本数据集同时作为Lee等人2022年发表于期刊《冰冻圈》（*The Cryosphere*）的论文"东南极洲维多利亚地北部拉森蓝冰区域年代地层学及其古气候意义"的补充材料公开。