CO2 in ice cores at core depth 1.95 m 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（Blue Ice Areas, BIAs）在古气候重建领域具备多重优势，但该区域复杂的冰流运动却制约了冰芯年代的精准限定。本研究采用前沿先进的技术手段，证实拉森蓝冰区的年代覆盖末次冰消期；同时证明，位于东南极维多利亚地北部的拉森蓝冰区，可为末次冰消期的古气候重建提供关键支撑。本数据集包含拉森蓝冰区的气体组分（CO₂、CH₄、N₂O、δ¹⁸O_atm、δ¹⁵N-N₂、δO₂/N₂、δAr/N₂）、稳定水同位素（δ²H_ice、δ¹⁸O_ice）以及年代学数据。冰芯样品于2019年1月采自东南极维多利亚地北部。气体组分分析工作在首尔国立大学与日本国立极地研究所完成，稳定水同位素分析则由韩国极地研究所负责实施。本数据集同时作为Lee等人（2022）发表于《冰冻圈》（*The Cryosphere*）的论文《东南极维多利亚地北部拉森蓝冰区年代地层学及其古气候意义》的补充数据对外发布。