Impacts of Interactive Stratospheric Chemistry on Antarctic and Southern Ocean Climate Change in the Goddard Earth Observing System, Version 5 (GEOS-5)

摘要: Stratospheric ozone depletion plays a major role in driving climate change the Southern Hemisphere. To date, many models prescribe stratospheric layer's evolution using monthly and zonally averaged fields. However, prescribed underestimates Antarctic lacks zonal asymmetries. In this study we investigate impact of interactive chemistry instead on simulations Ocean. Two sets 1960-2010 ensemble transient are conducted with coupled ocean version Goddard Earth Observing System Model 5: one other derived from same simulations. The model's climatology is evaluated observations reanalysis. Comparison 1979-2010 trends between these two reveals that has important effects not only stratosphere, troposphere surface, but also Ocean sea ice. Interactive causes stronger lower stratosphere cooling circumpolar westerly acceleration during November-December-January. It enhances stratosphere-troposphere coupling leads to significantly larger tropospheric surface changes. wind-stress cause increases Meridional Overturning Circulation, leading year-round warming near enhanced ice decrease.