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Walls of Laboratory Chambers Skew Experimental Results
09/15/2014

A new study has proven “vapor losses to the walls of laboratory chambers can suppress the formation of secondary organic aerosol, which in turn has contributed to the underprediction of SOA in climate and air quality models,” say experts.

Back in April 2014 a team of scientists from the University of California conducted a test to demonstrate vapor losses in the walls of laboratory chambers. The experiment proved that loss of vapor in the walls of laboratory chambers can squash the formation of aerosol.

Researchers have noted “SOA impacts air quality and climate and makes up a major fraction of particulate matter in the atmosphere. Yet SOA concentrations have been significantly underestimated in regional air quality models. Nearly all models of secondary organic aerosols are tied to observations of their formation in laboratory chamber experiments. However, the effect of vapor loss to chamber walls previously had been neglected.”

“To accurately predict the health and climate impacts of particles, we need to accurately predict their abundance in the atmosphere,” Christopher Cappa, professor of civil and environmental engineering at UC, said.

 

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