Fig. 2: Aerosol optical thickness (τa) measured with sun photometer at Hyytiälä. | Nature Communications

Fig. 2: Aerosol optical thickness (τa) measured with sun photometer at Hyytiälä.

From: Significance of the organic aerosol driven climate feedback in the boreal area

Fig. 2

a τa at 340 nm (purple) and 500 nm (green) as a function of temperature (T). Both daily (circle) and summer (square) medians are shown. Summer median τa are included only for years 2012, 2015, 2017, and 2018 due to data availability. b τa at 340 nm as a function of organic aerosol (OA) mass loading. Daily medians are shown with color indicating the year.

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