| Summary: | These data are associated with a manuscript under consideration for publication, and are therefore provided as a fixed data package. The continually updated ArcticGRO data package can be found at the Arctic Data Center doi:10.18739/A2XW47X7D In summer 2003, the Arctic Great Rivers Observatory (ArcticGRO) began to collect the first methodologically-consistent series of river water chemistry samples at downstream sites on the six largest rivers draining to the Arctic Ocean: the Ob’, Yenisey, Lena, and Kolyma in Russia, and the Yukon and Mackenzie in North America. These measurements have continued largely uninterrupted to this day. This data package is associated with a publication that presents the first comprehensive time series analysis of this nearly 20-year dataset. Details on sample collection and analyses are provided in the “methods” section, below.
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