ADD - International Arctic Environmental Data Directory
ADD is a network cooperation between major Arctic environmental data holders. This cooperation shall make Arctic data and information available to circum-arctic users.
www.grida.no/add/   reviews

Unaami Arctic Data Collection: Quantifying Arctic change across multiple disciplines
The Unaami Arctic Data Collection is a carefully selected, diverse set of over eighty multi-disciplinary time series which quantify complex, interrellated, Arctic changes. It includes good geographic coverage of the northern polar regions across disciplines, including fisheries, biological, terrestrial, oceanic, sea ice, atmospheric and climate index data, from 1970 to the present.
www.unaami.noaa.gov/   reviews