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Arctic Runoff Data Base (ARDB)

... in support of CliC and ArcticHYCOS

map of project stations in the Actic region GRDC stations in the Arctic region (Status: Sep 2018)GRDC stations in the Arctic region (Status: Sep 2018)

The Arctic and its hydrology play a central role in regulating the Earth’s climate. The Arctic Ocean’s water is unusually fresh in comparison with the remaining world’s ocean system. Pathways and variability of freshwater circulation within the Arctic Ocean are still poorly understood, despite concerns regarding surface freshening in the North Atlantic and its influence on the global thermohaline circulation.

The Global Runoff Data Centre (GRDC) operates the Arctic Runoff Data Base (ARDB) to support programmes and projects of the United Nations and their special organisations in the Arctic region. The ARDB was established during the Arctic Climate System Study (ACSYS) from 1997 to 2003. The data set initially compiled for the ACSYS and CliC projects is continually updated. In the context of the Arctic-HYCOS project, the ARDB will be expanded continously to support the evolving Arctic-HYCOS basic network.

Technically, the ARDB forms a subset of the Global Runoff Database (GRDB). GRDB currently holds river discharge time series data from a total of 2,449 gauging stations in the arctic region with earliest records from 1877 and an average time series length of 37 years, with a range from 1 to 123 years. 1,043 stations feature daily data, and 2,188 stations monthly data. Access to ARDB follows GRDC's data policy of free and unrestricted but identified access and is limited to non-commercial applications.

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