Physical properties — Talos Dome — Ice Core — IGE (PP-TD-ICE-IGE)

**Talos dome is** a coring site in **East Antarctica**. The deep ice core was drilled under the frame of the European research project **TALDICE* uniting Italy, France, Germany, Switzerland and the UK. The drilling was made between 2004 and 2008. For more information about the site and the coring project: www.taldice.org, Frezzotti et al. (2007) (https://doi.org/10.1029/2006JF000638 ), URBINI et al. (2008) (10.1016/j.gloplacha.2007.08.002). The data provided here is published in Montagnat et al. (2012) (http://dx.doi.org/10.1016/j.epsl.2012.09.025) The dataset contains **texture data** (Crystallographic orientations) measured on thin sections of ice extracted along the 1 620 m deep ice core. The Talos Dome ice core has been subdivided and stored into core sections of one meter long. **Thin sections** are made out of strips cut vertically all along the core sections (see figure ice-core.png) Each thin section is about 10 cm high and 6 cm wide, and between 0.25 and 0.4 mm thick. The top of the section is the natural top (top of the ice sheet). Thin sections have been analysed with the **Automatic Ice Texture Analyser** (AITA, https://doi.org/10.3189/172756403781815401), providing orientation data of the c-axes (optical axes) all over the section, by means of the azimuth and colatitude angles. C-axis orientation data (azimuth and colatitude) are obtained with a spatial resolution of 43 µm (6.8 µm for specific cases) and an angular resolution of about 3°. The data can be Visualised and analysed by using: (https://mecaiceige.gricad-pages.univ-grenoble-alpes.fr/tools/documentations/AITA-book/docs/intro.html) **Each data file** is related to a thin section. The filename reflects the **drilling site** (Talos_Dome), the **depth** corresponding to the top of the core section from which the thin section is extracted, the **position** of the section along the core section and **comments**. Ex: Talos_Dome_1611m_20_BIS.csv is located between 1 611.20 m and 1 611.30 m depth, and it is the second analysis of the thin section. Comments are described in the section “comments” of the.json metadata file associated with each data file (see below). A file Talos_DomeXXXm.csv is organised into **two sections**: the header and the data. The **header** contains *information* such as the *name* of the file, the *resolution* (µm) and the *size* of the analysed section (x * y pixels). The data are organised into **3 columns**: 1.**azimuth** between 0 to 360 degrees, 2.**colatitude** between 0 to 90 degrees, 3.**quality factor** between 0 and 100. Each line is related to a pixel, from the top left to the bottom right of the thin section. Please note that thin section 1 250 m and 1 110 m have been horizontally oriented by spinning the thin section of -90° around the line of sight. A **metadata.json** type file is available, that contains **all necessary information about the data set** (measured depths, dates of measurement, resolutions, orientations and other comments). To open the json file with the pandas python library, the following commands are used: **import** pandas as pd **import** json as js path_meta_data =<$PATH/meta_data.json> **with** open(path_meta_data) **as** file_json: meta_data=js.load(file_json) DF=pd.DataFrame(meta_data) DF