Megaslumps in fluvially incised hummocky moraine, Peel Plateau, northwestern Canada.

In bitter cold regions like northwestern Canada, permafrost has preserved relict ground-ice and vast glacial sedimentary stores in a quasi-stable state. These landscapes therefore retain a high potential for climate-driven transformation. In their open-access GEOLOGY article published online on 7 Feb. 2017, Steven Kokelj of the Northwest Territories Geological Survey and colleagues write that climate-driven renewal of deglaciation and potential postglacial permafrost landscape evolution has major implications for predicting the nature and trajectories of northern landscape change and the cascade of downstream impacts.

Lo strumento a raggi X e ultravioletti, imbarcato sul satellite geostazionario GOES-16 della NASA, ha seguito il brillamento del 21 gennaio scorso. I suoi dati, elaborati dal centro di meteorologia spaziale americana, saranno utili per migliorare la nostra conoscenza delle attività solari e mettere in atto strategie di prevenzione