Understanding the isotopic variability and the sources of moisture in modern climate systems is required to develop speleothem isotope-based climate reconstructions.
We collected water samples (cave drip or pool waters, groundwaters, and rainfall) from sites in Mallorca (Balearic Islands, western Mediterranean). We used our isotopic data to derive the local meteoric water line. The results help tracking two main sources of air masses affecting the study sites: rain events with the highest δ18O values (> -5‰ ) originate over the Mediterranean Sea, whereas the more depleted samples (< -8‰ ) are sourced in the North Atlantic region.
