What happens when scientists, dedicated to basic scientific research, are called forth to participate in politically fraught scenarios? We explore this question through a qualitative study of the intimate experiences of scientists who developed the first Argentine National Glacier Inventory (2010–2018). This inventory was entrusted to IANIGLA, a state-funded scientific institute. It arose from the world’s first glacier protection law, drafted to protect all glacier and periglacial environments as hydrological reserves as mining megaprojects encroached on them. This article examines the failed attempts to turn periglacial environments into “governable objects” (Hellgren 2022). Interviews and an auto-ethnography among scientists involved reveal that these failures can be attributed to unresolved tensions in upscaling and downscaling practices that are needed to simultaneously produce world-class climate science and locally relevant policy science. The failure to anticipate or resolve those tensions, in the context of grassroots opposition to mining, undermined trust in science and government, pointing to the local limits of global climate science.