Monthly averaged sulfate concentrations for March and April at eight arctic monitoring sites
Monthly averaged sulfate concentrations for March and April at eight arctic monitoring sites and Sen’s slope estimates for the long term (approximately 1980 through the available data) and short term (approximately 1990 through the available data) trends. Trend lines are not shown for a > 0.1.
Data made available for Alert by the Canadian National Atmospheric Chemistry (NAtChem) Database and Analysis System, for Barrow by NOAA PMEL (http://saga.pmel.noaa. gov/data/), and for the other stations by EMEP (http://www.emep.int/).
Cartographer / Designer
Satu Turtiainen, Erika Varkonyi, Petri Porvari, Marjut Nyman (Finnish Environmental Institute)