Figure 2

Pie plot showing the distributions of AAs, aldehydes and the most relevant short-chain CAs (formate, acetate, oxalate, malonate and succinate) relative to the total DOC in cloud water samples.
The percentages were calculated based on the average concentrations of individual AAs, aldehydes, CAs and DOC in mg C L−1. The second plot shows the distribution of a single AA relative to the total distribution.