There's something about this that doesn't make sense to me.
Energy doesn't just disappear. These particles wouldn't be able to brake solar energy without getting hotter themselves. Since these partcles come in direct contact with either the rest of the atmosphere or with the the earth itself, the heat they absorbed would get transferred to the earth anyway. So it seems to me that whatever heat that's missing from the solar energy that was "braked" would be made up for by the heat from these very particles.
About the only way the aerosol particles could contribute to cooling would be if they reflected light particles (solar energy) away from the planet. But as the earlier poster stated and demonstrated with an image, the Far East (population ~2 Billion) is pumping out more aerosol pollutants then us capitalistic Americans (200-300 million) did a few decades ago. So no warming should be occurring now if these aerosols caused cooling a few decades ago. Besides, if an increase in retained energy or heat was the primary affect we are currently experiencing, we should not be setting any new cold temperature records. Yet, we did here a few months ago. Also had snow on the ground for the first time in about 25 years. This was followed 4 weeks later by new heat records. Strange extremes indeed. My guess would be that energetic input is the primary current affect. Mostly caused by increased solar radiation along with some increase in human produced energy. So we have some general warming along with stronger extremes in winter and summer. I think in the short run perhaps dealing with the extremes is going to be more important then dealing with a slight warming trend which may not last very long.