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Monthly averaged aerosol optical depth anomalies at Barrow for March and April

Monthly averaged aerosol optical depth anomalies at Barrow for March and April (map/graphic/illustration)

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Monthly averaged aerosol optical depth anomalies at Barrow (Alaska) for March and April. The anomalies are relative to a base of non-volcanic years. Data from 1992 and 1993 were removed due to stratospheric aerosol influx from the Pinatubo eruption in 1991. Vertical lines represent 1 standard deviation of the monthly mean
Sources data provided by NOAA CMDL
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Designer 		Satu Turtiainen, Erika Varkonyi, Petri Porvari, Marjut Nyman (Finnish Environmental Institute)
Appears in AMAP Assessment 2006: Acidifying Pollutants, Arctic Haze and Acidification in the Arctic
Published 2009
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