Overview
- Published today in Frontiers in Earth Science, the study analyzes a nearly 10-meter Weißseespitze core spanning from the Roman era to the mid-17th century.
- Pronounced peaks in arsenic, lead, copper, and silver beginning around 950 CE align with periods of intensified medieval mining and with some signals tied to major volcanic eruptions.
- Biomass-burning markers, including a levoglucosan peak near 1128 CE, match a nearby peat record consistent with regional drought and human land use during the medieval period.
- Researchers estimate that only about 7% of the recorded pollution in this core was anthropogenic, providing a crucial benchmark for pre-industrial atmospheric conditions.
- A 2025 return to the site found the ice column reduced to roughly 5.5 meters, spurring plans for further fieldwork and urgent calls to rescue remaining Alpine ice archives.