Ozone Recovery With Its Impact On Global Climate And Aerosol’s Impact On Stratosphere

Increased greenhouse gases and likely ozone recovery will profoundly affect the global climate change in the21st century. In addition, the aerosol is another important factor that affects the climate change. Through analyzing WACCM-3.0model simulation results can be obtained:1) Simulation results of the three greenhouse gases emission scenarios (to2099) show:global ozone level is increasing even more than the level of around1979with the stratospheric temperature decreasing. Ozone recovery in the A2scenario is fastest and exceed the maximum, A2scenario is up higher by about4.5%at most and A1B scenario is up higher about2.46%, B2scenario restore the slowest, beyond the lowest, only1.31%. As the same, the stratospheric temperature decrease sharpest at the end of this century, A1B scenario the second, B1the smallest. Ozone will increase considerably in the upper stratosphere and the lower stratosphere of Antarctic, the equator at the top of the lower stratospheric ozone showed a trend of decrease, ozone recovery is slow in other region. Stratospheric temperature increases caused by ozone recovery may be different. Global ozone recovery of the stratospheric can be adjusted to changes in global precipitation magnitude smaller, in addition ozone recovery can absorption more ultraviolet radiation, so that to reduce the radiation to reach the ground, and can slow down global warming which cause by the greenhouse gases.2) WACCM-3model can well reproduce the main distribution characteristics of aerosols, but the value is low compared with the satellite data. Tropospheric aerosols have a significant on stratospheric climate, its effects are mainly located in high latitudes and polar regions, changes in the Southern Hemisphere than the Northern Hemisphere changes, temperature changes of up to9K, zonal wind variation also could reach11m/s, the ozone concentration is reduced by up to0.8ppmv at20hPa in the lower Antarctic stratosphere with a greatest change, change planetary wave propagation. Both of them affect stratospheric climate due to dynamic and thermodynamic reasons, they change the atmospheric circulation and then affect the planetary wave propagation from troposphere to stratosphere.