ESS11
Prof.
Jin-Yi Yu
Ozone Concentration
qThe observed depletion of the
stratospheric ozone (O3) layer from 1979 to 2000 is estimated to have caused a negative radiative
forcing (–0.15 Wm-2).
qThe total amount of O3 in the
troposphere is estimated to have increased by 36% since 1750, due primarily to anthropogenic
emissions of several O3-forming gases. This corresponds to a positive radiative forcing
of 0.35 Wm-2.