| http://www.w3.org/ns/prov#value | - And yes, the high share of non-absorbing aerosols exerts a strong negative forcing also today.Karsten,The crux of the issue is this: If we cannot really observe the strong negative forcing of sulfates at the surface over the most polluted areas because their effect is confounded by other forcings such as warming aerosols, how can we be so sure that the total aerosol *global* effect at the surface
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