Heating Up Aerosols
By ScienceAdvisor. Excerpt: Every day, aerosols form in clouds and swirl throughout the turbulent atmosphere. Aerosols, especially those under 10 nanometers, can be dangerous to humans when inhaled because of how easily they enter body tissues; estimates suggest exposure to fine aerosols causes around seven million premature deaths annually. Researchers wanted to see if climate change may alter how aerosol production occurs. Scientists have generally assumed that hot temperatures should hinder the formation of new aerosols.... To check, a team took measurements of nanoparticles and trace gases during a heat wave in central Texas. ...To their surprise, the researchers reported this week in Science that at conditions nearing 40ºC, new particles formed in droves . ...gaseous organic acids, an important precursor to new particle formation, which come from industry sources like traffic and biological sources like oak and pine trees. ...fatty acids in nanoparticle form...