Arctic permafrost: The ground is thawing Prof. Dr Guido Grosse, Head of Permafrost Research Section at the Alfred Wegener Institute. Permafrost Greenhouse gases Climate change Permafrost is the technical [...] Download AWI permafrost expert Dr. Guido Grosse is, jpg | 1 MB AWI permafrost expert Dr. Guido Grosse and, jpg | 710 KB AWI permafrost expert Dr. Guido Grosse in, jpg | 816 KB Researcher for permafrost Prof. [...] quantities of ground ice, which, when permafrost thaws, leads to melting of the ice and surface sinking. This can dramatically change the landscapes and water cycle in permafrost regions, while also affecting