612132.fig.001a
(a)
612132.fig.001b
(b)
Figure 1: Distribution of the number of analyzed particles from (a) southeastern Pacific and (b) Arctic marine boundary layers. Particles labeled as “marine polysaccharide" in Arctic samples correspond to Figure 2(a) (PsI) while those in southeastern Pacific samples correspond to Figure 2(b) (PsII). Particle frequency for the collected samples is partly a result of sampling bias and does not represent the observed particle size distribution.