This dataset presents the annual and sub-annual diatom records preserved in a set of ice cores from the Antarctic Peninsula and Ellsworth Land over the 1992-2019 CE interval, as presented in Tetzner et al. (2022). Annual diatom abundance (annual d-abundance) data are provided as annual averages for the 1992-2019 CE interval. Annual diatom concentration (annual d-concentration) data are provided as annual averages over the 1992-2019 CE interval. Sub-annual diatom concentration (sub-annual d-concentration) data are provided for each ice core as depth profiles for the 2002-2006 CE interval. Annual d-abundance and d-concentration are timeseries. Column A represents years between 1992 and 2019 CE. Annual data are listed for each ice core site alphabetically (Jurassic (JUR), Rothschild Island (ROIC), Sherman Island (SHIC) and Sky-Blu (SKBL)). Sub-annual d-concentration data are depth profiles. Column A represents ice depth (m). The ice depth interval presented in each file represents the 2002-2006 CE interval. Diatom abundance data are presented as the number of diatoms identified in an ice core annual layer (diatoms a-1). Diatom concentration data are presented as the number of diatoms identified per unit volume of water (L) contained on each annual (or sub-annual) sample (diatoms L-1). This dataset was created with the support of the Comision Nacional de Investigacion Cientifica y Tecnologica (grant number 72180432).

The British Antarctic Survey holds one of the most extensive collections of Antarctic rocks and fossils anywhere in the world. These are predominately from the Antarctic Peninsula region and Scotia Arc, although there is also important material from areas such as the Ellsworth Mountains, Marie Byrd Land and the Transantarctic Mountains. Some of these specimens go back to the very earliest days of the Falkland Islands Dependencies Survey in the 1940s, and include collections made by the pioneer geologists at bases such as Hope Bay and Deception Island. Right from the outset, every specimen collected in Antarctica has been numbered and catalogued, and a vast reference archive is now available for use by the geoscience community. We currently have information relating to 150,000 field samples often with associated analysis data such as geochemistry. Additionally we hold a variety of data for nearly 500 marine cores. Metadata and data are stored digitally within a number of Oracle 10g database tables and for some datasets such as the type and figured fossil collection there is external access through a web interface. However, a significant number of datasets exist only in analog form and are held within the BAS archives organised by individual geologist. This abstract acts as an overview of the BAS geological data - both terrestrial and marine.