João Canário and Diogo Ferreira from Polar2E – CQE/IST are now at the Centre of Northern Studies (CEN) research station at Kuujjuarapik/Whapmagoostui in Northern Quebec, for the winter campaign of the project “Arsenic speciation and biogeochemistry in Permafrost Thaw Lakes – Permarsenic” funded by the FCT through the Portuguese Polar Program. Permarsenic involves an interdisciplinary team of Polar2E and of CEN.