Investigation of Particle Formation in the Photo-oxidation of Dimethyl Sulphide

摘要

Chemical processes involving aerosols can affect the Earth's radiative balance and the oxidative state of the troposphere and, thus, the atmospheric lifetimes of important trace gases such as methane, ozone, non-methane hydrocarbons (NMHC), and dimethyl sulphide (DMS: CH_3SCH_3). Dimethyl sulphide, an important component of the biogeochemical sulphur cycle for approximately 60 % of the total natural sulphur gas released to the atmosphere in both hemispheres (Andreae, 1990; Bates et al., 1992; Spiro et al., 1992). It is believed that this compound plays an important role in the global sulphur cycle and its emissions represent more than 90 % of the biogenic sulphur emissions from oceans (Andreae and Raemdonck, 1983; Dacey et al., 1987).