The Relationship Between Stratospheric Sudden Warming And The Change Of Ozone In Northern Hemisphere

In this paper, through the stratospheric ozone and temperature and other relevant information in the northern hemisphere before and after the winter during 1980-2014a from the European Centre for Medium Range Weather Forecasts, according to the WMO indicators, we counted the stratospheric sudden warming events(SSWs) during the 35 years, and further refined the classification according to the custom parameters, and analyzed the spatial and temporal distribution of ozone and temperature while SSWs occurring, and the relationship between the two, and preliminary discussed the role of ozone in SSWs, as well as the influence of SSWs on East Asia weather. The main conclusions were as follows:1. We classified the SSWs during the 35a according to the custom parameters, drawn 81 times strong process and 72 times weak process. Results show that the SSWs generally occur in the winter and spring, the warming phenomenon occurs almost every year, and events mainly in a short process, its strength had little relationship with the duration of its process.2. In the SSWs occurring in the high latitudes of the Northern Hemisphere around the winter, ozone and temperature distribution was inversely correlated on the stratosphere 2hPa height; on the lower stratosphere 10,30,70hPa height, ozone and temperature distribution was positively correlated. Correlation was significant in several regions of ocean near the North Pole, Greenland, Novaya Zemlya and near the ocean surface, and the Bering Strait near the ocean, peninsula. In the strong and weak SSWs in the four height, the time correlation of the SVD first space model between ozone and temperature was best in the lOhPa, and was weakest in the 70hPa, showing that the type of spatial distribution of ozone and temperature had the most closely relationship on lOhPa height.3. In the Arctic polar night SSWs, the first and second model’s spatial distribution of ozone and temperature were same as the strong SSWs’, and quite different with the weak SSWs’. There were two possible reasons for this phenomenon:one was the main mechanism of strong and weak SSWs were different. The factors of weak SSWs were not manifest in the polar night, while the factors of strong SSWs were not affected by the polar night, so that the spatial distribution of SSWs in the polar night was closer to the strong SSWs’. The second was the strength of strong SSWs reached a certain extent, the impact of the polar night was weak, while the weak SSWs were greatly influenced by the polar night, so that the spatial distribution of SSWs occurring in the polar night was close to the strong SSWs’, and showing that the sun light conditions had little effect on the development of SSWs.4. We evaluated the ozone daily average from November to next March on 2hPa height during the 35 years in the Northern Hemisphere, founding that there was a high value center of ozone at mid-latitudes on 2hPa height in the Northern Hemisphere during the November. The content of ozone near polar increased with time. The high value center of ozone at mid-latitudes disappeared after the November, and the low value center of ozone near the polar was continued until February the following year, being the period corresponding to the peak of SSWs. So we can put the disappearance of the high value center of ozone at mid-latitudes on 2hPa height as the predictive factors of SSWs.