View ECCC Data Mart (English) (English, HTML)

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Publisher-reported update

2023-04-13

Permafrost loss is pervasive across northern circumpolar regions. The loss of frozen ground has profound impacts on water resources at varying spatial and temporal scales via changes to predominant hydrological processes, runoff pathways and entrainment rates of solutes and sediments. Consensus exists that permafrost loss will continue, and rates will vary spatially, but how hydrology and biogeochemistry will respond across large swaths of land remains largely unknown. Previous research elucidated small-scale processes or described circumpolar trends, with minimal cross-scale research. In particular, a pan-Canadian assessment of water resource vulnerability to permafrost loss is lacking. This study develops and applies a framework for assessing vulnerability of pan-Canadian water resources to permafrost loss. For the purposes of this study, “water resources” is defined as the surface hydrological and aquatic chemistry regime characterized by water budgets, aquatic chemistry concentrations and loads. The framework was applied in developing the Canadian Water Resources Vulnerability Index to Permafrost Loss (CWRVIPL), including mapping of the index across the Canadian North. The…

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