Holocene biomarkers (branched Glycerol Dialkyl Glycerol Tetraethers and alkane), reconstructed air temperature from Lake Armor (Kerguelen) and diatoms-based Sea Surface Temperature from marine core MD11-3353, Southern Indian Ocean

These data set contained the results of analyses for two lacustrine sediment cores form Lake Armor (Kerguelen, Southern Indian Ocean) and a marine core MD11-3353 (50◦34.02′S–68◦23.13′E, 1,568 m water depth) , Southern Indian Ocean. Lake Armor is composed of three sub-basins. Sediment cores were collected from two of them. This dataset contains the biomarker analysis results from sediments of core ARM14-I (Site I) and ARM14-II (Site II). The biomarkers analyzed are branched Glycerol Dialkyl Glycerol Tetraethers (brGDGTs) and linear alkanes (n-alkanes). The dataset includes the abundances of the major brGDGTs and their derived indices, the abundances of n-alkanes, and the hygrogen and carbon (δD and δ13 isotopic ratios of n-alkanes. δ13C analyses were not performed on core ARM14-II. The marine core MD11-3353 (50◦34.02′S–68◦23.13′E, 1,568 m water depth) was collected onboard the Marion Dufresne II in 2011 during the oceanographic expedition MD185 INDIEN-SUD 1. We selected this core due to its proximity to the Kerguelen Archipelago (155 km south-westward) and the previously established low-resolution Holocene Sea Surface Temperature (SST) reconstruction (Civel-Mazens et al., 2021a). The core is 38.50 m long and is composed of diatom oozes, of which the upper 1.90 m corresponds to the Holocene period (Mazaud and Michel, 2011). At this localisation, the nearest oceanic front is currently the Antarctic Polar Front (Y. ‐H. Park et al., 2019). The modern summer SST at the core location is approximately 4.5 °C. It is composed of to excel file (.xlsx) with their README text file (.txt). This dataset is associate to the publication Bellet et al. 2025 "Holocene climatic changes in the Kerguelen archipelago (South Indian Ocean) based on marine and lacustrine palaeoclimatic archives", Quaternary Science Reviews