Phosphine,a volatile phosphorus compound,might be of importance to the phosphorus cycles in the atmosphere.For relatively reduced phosphine,hydroxyl free radicals induced by UV from daylight cause its cleavage and oxidation.At same time,phosphine will be converted to water soluble phosphate,which will reach the ocean or land via rain or aerosol.It has dual effects for negative influences as acid rain and positive effects as nutrient,especially for oligotrophic water.