I am working since 2000 in the western Antarctic Peninsula, one of the regions on Earth with fastest warming. I am interested in identifying changes in the dynamics of the ice-free areas, especially induced by modifications in permafrost. I am maintaining a series of permafrost and active layer observatories across ci. 450 km from King George Island to Anvers Island. Currently we are evaluating possible impacts of changing permafrost on infrastructure, such as research stations and airfields. This research is a long-term collaboration with Miguel Ramos and Miguel Angel de Pablo (University of Alcalá, Spain), Gabriel Goyanes (Instituto Antártico Argentino), Carlos Schaefer (Univ. Federal de Viçosa, Brazil) and James Bockheim (Univ. Wisconsin-Madison).