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| Sensitivity simulations of the organic sources on the Arctic ozone depletion events |
| LIU Zhao-huan, HAN Yong-xiang |
| Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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Abstract By using the numerical model KINAL, the present research simulated the temporal evolution of ozone and bromine species in a typical Arctic ozone depletion event (ODE) under three source fluxes. The organic source intensity was also put to a sensitivity analysis to examine its impact on the ODE. The results have revealed several facts as following:There was a significant negative correlation between the atmospheric ozone and bromine. When there was only inorganic source input, it took 5.4d to completely consume ozone in the boundary layer. After adding organic source emissions of an average intensity to the model, the ozone depleting process was accelerated for about 1.3d. Concentration of bromine in the boundary layer was enhanced, causing the induction stage of the ODE to shorten for 1.2d. The ODE acceleration did not change obviously, whether HOBr or Br2 made the major species in the organic source emission. The bromine species enhanced the ODE by accelerating the induction stage. A significant positive correlation was found between the organic source intensity and the consumption rate of atmospheric ozone. When the organic source intensity rised, the acceleration effect on the induction stage of the ODE was abated. The induction stage lasted for at least 3days. The temporal evolution of ozone was not greatly impacted by the organic sources.
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Received: 19 November 2018
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