Effect of changes in radiatively active species upon the lower stratospheric temperatures

A one-dimensional radiative-convective model is employed to investigate the thermal effects in the lower stratosphere due to changes in the concentrations of radiatively active species. The radiative equilibrium of the lower stratosphere is perturbed both by the local changes in the concentrations of radiatively active species and by the changes in species' concentrations occurring in the troposphere and the middle/upper stratosphere. Perturbations in the concentrations of each of the species, as considered above, leads to a temperature decrease in the lower stratosphere. Relative to the well-mixed greenhouse gases only case, simultaneous increases in these gases and tropospheric aerosols cause a reduction of the net surface-troposphere radiative forcing, thereby diminishing the surface warming. -from Authors