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. Dating glaciers is an arduous yet essential task in ice corestudies, which becomes even more challenging when the glacier isexperiencing mass loss in the accumulation zone as result of climatewarming, leading to an older ice surface of unknown age. In this context, wedated a 46 m deep ice core from the Central Italian Alps retrieved in 2016from the Adamello glacier in the locality Pian di Neve (3100 m a.s.l.). Herewe present a timescale for the core obtained by integrating results from theanalyses of the radionuclides 210Pb and 137Cs with annual layercounting derived from pollen and refractory black carbon concentrations. Ourresults clearly indicate that the surface of the glacier is older than thedrilling date of 2016 by about 20 years and that the 46 m ice core reachesback to around 1944. For the period of 1995–2016 the mass balance at thedrilling site (former accumulation zone) decreased on average of about 1 m w.e. a−1 compared to the period 1963–1986. Despite the severe mass lossaffecting this glacier even in the former accumulation zone, we show that itis possible to obtain a reliable timescale for such a temperate glacierusing black carbon and pollen seasonality in combination with radionuclides210Pb and 137Cs. Our results are therefore very encouraging andopen new perspectives on the potential of such glaciers as informativepalaeoarchives.

Significant mass loss in the accumulation area of the Adamello glacier indicated by the chronology of a 46 m ice core