在大气中,大小约在十分之几微米的粒子值得注意。首先,它们较难除去,因此长时间悬浮着。其次,它们强烈地同阳光相互作用,因此,亚微米气溶胶集体系统构成一个十分敏感的气候调节机。在这方面,注意如下事实是有意义的:生物产生的硫酸盐气溶胶的现有数量,几乎等于使大气不透光所需要的数量。这可能意味着,含硫气溶胶对气候起着某种作用。 In the atmosphere, particles of about a tenth of a micron in size are noteworthy. First, they are harder to remove and therefore float for a long time. Second, they interact strongly with sunlight, so the submicron aerosol collective system constitutes a very sensitive climate regulator. In this regard, it is instructive to note the fact that the amount of sulfate aerosol produced by living organisms is almost equal to the amount needed to render the atmosphere opaque. This may mean that sulfur-containing aerosols have some effect on the climate.