image: SMEAR II measurement station in Hyytiälä, southern Finland. This image relates to a paper that appeared in the Feb. 22, 2013, issue of Science, published by AAAS. The paper, by Markku Kulmala at University of Helsinki in Helsinki, Finland, and colleagues was titled, “Direct Observations of Atmospheric Aerosol Nucleation.” view more
Credit: [Image courtesy of Juho Aalto]