Ice-penetrating radar internal stratigraphy over Dome C and the wider East Antarctic Plateau

The data set published here consists of 26 ice-penetrating radar IRHs (internal reflecting horizons) which were traced across multiple ice-penetrating radar surveys that deployed several generations of modern ice-penetrating radar sounders over a decade, between 2008 and 2018, over the Dome C region of the East Antarctic Plateau. The data set is associated to publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759–4777, 2021, https://doi.org/10.5194/essd-13-4759-2021. We can subdivide the radar sounders used into three sets. The primary set was collected by the University of Texas at Austin Institute for Geophysics (UTIG) and the Australian Antarctic Division (AAD) as part of the ICECAP project) between 2008 and 2015. This includes the Oldest Ice candidate A (OIA) survey flown by ICECAP in January 2016. Data were collected with the High Capacity Airborne Radar Sounder (HiCARS) 1 & 2 and its Multifrequency Airborne Radar-sounder for Full-phase Assessment (MARFA) descendant. The data was collected from a DC-3T Basler which operated from Concordia Station. The second set consists of the Vostok-Dome C airborne radar transect was flown by the Center for Remote Sensing of Ice Sheets (CReSIS) at the University of Kansas using the Multi-Channel Coherent Radar Depth Sounder (MCoRDS) in a single flight line in 2013. A P-3 Orion operating from McMurdo Station collected these data as part of NASA Operation Ice Bridge. The third set consists of a subset of the LDC ground-based radar survey, towed behind a PistenBully PB300 tractor, collected by the Beyond EPICA - Oldest Ice (BE-OI) European Consortium using the British Antarctic Survey’s (BAS) Deep Looking Radio Echo Sounder (DELORES) radar system. Each IRH has been traced in all three radar sets and is published here as a single csv and netcdf file. Formats are self-documented in these csv/netcdf files. Where HiCARS and MCoRDS radar transects are used, the IRH is provided at a 1 km spatial resolution, where DELORES radar transects are used, the IRH is provided at a 250 m spatial resolution. The 26 IRHs published here were traced semi-automatically by first author Marie Cavitte, using Landmark's Decision Space Desktop software and its built-in picker. The IRHs are dated at the EDC ice core using the AICC2012 timescale (Veres et al., 2013; Bazin et al., 2013). Ice core ages are transferred onto the IRHs on radar transect MCM/JKB1a/EDMC01a at distance_m (column in the data sets) = 110.153 m along the transect. That radar point of closest approach is 94 m away from the ice core site. Depth and age uncertainties associated to each IRH are quantified n the associated publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759–4777, 2021, https://doi.org/10.5194/essd-13-4759-2021. Besides NSF this dataset is the result of additional support from NERC grant - NE/D003733/1, NASA grants - NX08AN68G, NNX09AR52G, NNX11AD33G, NNX13AD53A, and funding from the G. Unger Vetlesen Foundation. \nNote that the dataset was archived before the accompanying paper was officially published. The abstract and dataset description has been updated to cite the correct reference to the ESSD paper (Cavitte et al., 2021) after the paper was published. The headers of the actual data files contain only a placeholder to this reference.本公开数据集包含26条冰穿透雷达内部反射层（internal reflecting horizons, IRH），这些反射层是在2008至2018年的十年间，通过多代现代冰穿透雷达测深系统，在东南极高原穹顶C（Dome C）区域开展的多轮冰穿透雷达勘测中追踪得到的。本数据集关联发表论文如下： Cavitte, M. G. P、Young, D. A、Mulvaney, R、Ritz, C、Greenbaum, J. S、Ng, G、Kempf, S. D、Quartini, E、Muldoon, G. R、Paden, J、Frezzotti, M、Roberts, J. L、Tozer, C. R、Schroeder, D. M 及 Blankenship, D. D. 《东南极高原中部全新世至中更新世高精度放射地层学数据集》，《地球系统科学数据》（Earth Syst. Sci. Data），13卷，4759–4777，2021，https://doi.org/10.5194/essd-13-4759-2021。 我们可将所用的雷达测深系统划分为三组。第一组数据由德克萨斯大学奥斯汀分校地球物理研究所（UTIG）与澳大利亚南极局（AAD）作为ICECAP项目的一部分，于2008至2015年间采集，其中包含ICECAP于2016年1月开展的最古老冰候选A（OIA）勘测。数据采集使用了大载荷机载雷达测深仪（HiCARS）1型与2型，及其衍生型号全相位评估多频机载雷达测深仪（MARFA），搭载平台为从康科迪亚站出发执行任务的DC-3T巴斯拉尔飞机。 第二组数据为沃斯托克-穹顶C（Dome C）机载雷达剖面，由堪萨斯大学冰盖遥感中心（CReSIS）于2013年使用多通道相干雷达测深仪（MCoRDS）通过单条飞行航线采集，搭载平台为从麦克默多站出发执行任务的P-3猎户座飞机，该任务隶属于NASA冰桥行动（Operation Ice Bridge）。 第三组数据为Beyond EPICA-最古老冰（BE-OI）欧洲联盟使用英国南极调查局（BAS）深探无线电回声测深仪（DELORES）雷达系统采集的LDC地面雷达勘测子集，该勘测由PistenBully PB300牵引车拖曳完成。所有3组雷达数据中均已追踪到这26条IRH，本数据集以单个CSV与NetCDF文件形式公开，文件格式的说明已内嵌于上述CSV/NetCDF文件中。 当使用HiCARS与MCoRDS雷达剖面数据时，IRH的空间分辨率为1 km；当使用DELORES雷达剖面数据时，IRH的空间分辨率为250 m。 本次公开的26条IRH均由第一作者Marie Cavitte使用Landmark公司的Decision Space Desktop软件及其内置拾取工具半自动追踪得到。 这些IRH的定年基于EDC冰芯的AICC2012时间标尺（Veres等，2013；Bazin等，2013）。 冰芯年龄被校准至雷达剖面MCM/JKB1a/EDMC01a上距离为110.153 m（数据集中的distance_m列）的IRH位置处，该雷达测点与冰芯场地的最近距离为94 m。每条IRH对应的深度与年龄不确定性已在关联论文中量化： Cavitte, M. G. P、Young, D. A、Mulvaney, R、Ritz, C、Greenbaum, J. S、Ng, G、Kempf, S. D、Quartini, E、Muldoon, G. R、Paden, J、Frezzotti, M、Roberts, J. L、Tozer, C. R、Schroeder, D. M 及 Blankenship, D. D. 《东南极高原中部全新世至中更新世高精度放射地层学数据集》，《地球系统科学数据》（Earth Syst. Sci. Data），13卷，4759–4777，2021，https://doi.org/10.5194/essd-13-4759-2021。 除美国国家科学基金会（National Science Foundation, NSF）外，本数据集的完成还得到了以下资助：NERC项目编号NE/D003733/1、NASA项目编号NX08AN68G、NNX09AR52G、NNX11AD33G、NNX13AD53A，以及G. Unger Vetlesen基金会的资金支持。 请注意：本数据集在关联论文正式发表前已完成归档。论文发表后，本数据集的摘要与数据集描述已更新，以正确引用《地球系统科学数据》（Earth Syst. Sci. Data）期刊的该篇论文（Cavitte等，2021）。但实际数据文件的文件头仅保留了该引用的占位符。