Long-term diffusion model of atmospheric pollutant (ISCLT3) called regulatory model is a kind of Gaussian model recommended by U.S. Environmental Protection Agency.

• 大气污染长期扩散模型(ISCLT3)是高斯模型的一种,是美国环境保护署强制推荐的大气污染扩散模型,并称为法规模型;