Manchester Chamber Experiments (2010)

Glyoxal Production from Marine Aerosol

The three CE-DOAS instruments was taken to the University of Manchester Aerosol Chamber to study the production of glyoxal from laboratory generated seaspray particles. Particles were produced in a bubble tank and flowed into the chamber. Once the chamber was full ozone was injected into the chamber and the lights were turned on to initiate OH chemistry. Real sea water samples were UV irratiated and algae exudates were cultured in then this seawater before put into the bubble tanks. A maximum glyoxal production in the chamber of 15.2 pptv/hr.

Glyoxal production from bulk seawater and algae exudates

A flow reactor containing two CE-DOAS cavities (430-490 nm and 515-545 nm) was constructed on site to investigate glyoxal production from ozone reactions with the same seawater samples used in the Chamber experiments. No glyoxal production was observed above the reactor background.