Arctic-HYCOS hydrological data

The Arctic-HYCOS observing system provides daily and monthly gauged river discharge data from a selection of stations operated by the national hydrological services (NHS) in the Arctic Council member states (Canada, Denmark, Finland, Iceland, Norway, Russian Federation, Sweden and United States of America). The observation system is established by the Arctic-HYCOS project (https://hydrohub.wmo.int/en/projects/Arctic-HYCOS). The set of stations have been selected to provide a basis for monitoring fresh water flow to the Arctic Ocean and for monitoring changes in the hydrological regime. The current list includes 423 stations of which 72 are listed as flow-to-ocean stations, representing the most reliable downstream station in the river basins. The Global Runoff Data Centre (GRDC, http://www.bafg.de/GRDC) serves as a focal point redistributing historical data and station metadata, whereas provisional and (when available) near-real-time data should be provided directly by the NHS.