Understanding processes affecting the supply, transport, accumulation and release of the various sources of freshwater in the Arctic is important as they have significant effects on regional sea-ice processes, ocean stratification, nutrient distribution and ocean acidification. Arctic freshwater has the potential to modulate climate on both regional and global scales. This includes the Atlantic meridional overturning circulation, atmospheric Arctic-mid-latitude linkages, release of additional greenhouse gases from thawing subsea permafrost and advection of waters corrosive to calcium carbonate to the North Atlantic.

We welcome contributions from observers and modellers on the following topics:
- Sources of freshwater to the Arctic under a changing climate
- The Arctic freshwater budget and storage anomalies
- Freshwater tracers and propagation of anomalies
- Coherence between different time series of freshwater observations
- The fate of freshwater exported from the Arctic
- Hydrological feedbacks between the liquid ocean, the cryosphere and the atmosphere
- Effects of freshwater variability on biogeochemistry and ecosystems