Accelerated Arctic land warming and permafrost degradation during rapid sea ice loss

摘要: [1] Coupled climate models and recent observational evidence suggest that Arctic sea ice may undergo abrupt periods of loss during the next fifty years. Here, we evaluate how rapid affects terrestrial ground thermal state in Community Climate System Model. We find simulated western land warming trends are 3.5 times greater than secular 21st century climate-change trends. The accelerated signal penetrates up to 1500 km inland is apparent throughout most year, peaking autumn. Idealized experiments using Land Model, with improved permafrost dynamics, indicate an period substantially increases heat accumulation. Enhanced accumulation leads degradation warm increase vulnerability colder under continued warming. Taken together, these results imply a link between health.