Figure 6.
Reconstructed and measured biovolume specific absorption coefficients of glacier ice and snow algae and estimated radiative forcing. (a) Reconstructed spectral absorption of glacier ice algae for each pigment group of the average pigment composition (barplot insert). (b) Reconstructed spectral absorption of snow algae for each pigment group of the average pigment composition (barplot insert). (c) Reconstructed absorption of glacier ice algae (brown colour) and snow algae (red area without filling) with additionally measured “packaged” cellular absorption of snow algal cells (red colour with the filled area). For snow algae, the difference between the reconstructed approach and the “packaged” cellular absorption is marked as the striped area. Instantaneous radiative forcing per algal group estimated for the incoming irradiance of 91,763 W m−2 (b) Percentage contributions of glacier ice and snow algae to instantaneous radiative forcing of the algal community for the community composition scenarios at Bruckner Glacier, Heim Glacier and Mittivakkat. Cell shapes were created with BioRender.com.