Arctic systems are under intense pressure from anthropogenic activities, with climate change in particular inducing rapid the interlinked cycling of water and various biogeochemical constituents, thus also ecological processes that depend on these cycles. This special issue for Limnology Oceanography explores our changing Arctic, contributions across watershed-lake-river-estuary-coastal-open oc...

Connectionist models usually have a single weight on each connection. Some interesting new properties emerge if each connection has two weights: A slowly changing, plastic weight which stores long-term knowledge and a fast-changing, elastic weight which stores temporary knowledge and spontaneously decays towards zero. If a network learns a set of associations and then these associations are "bl...