Analysis of problem

Before the signing of the Montreal Protocol,due to the human production and life of industrial refrigerants and other substances widely used,a large number of chlorofluorocarbons flow into the atmosphere to gather,and the atmosphere of high-altitude ozone photochemical reaction,resulting in rapid stratospheric ozone depletion and a large area of the thin zone.In some areas,such as the Antarctic polar region,such photochemical reactions caused by ozone depletion is very serious,leading to low total area of ozone,the formation of well-known“ozone hole”.

Up to now,the Montreal Agreement has been implemented for over 30 years.Based on satellite and ground-based ozone monitoring,it has been observed that the rate of total ozone depletion in the atmosphere has dropped significantly over the past decades and is increasing in some regions and even early showed the signs of ozone layer recovery.In order to analyze the temporal and spatial characteristics of total atmospheric ozone over the next 50 years,the analysis of time series on the total ozone amount over a long period of time is selected appropriately because of the temporal,seasonal and geographical distribution complexity of global atmospheric ozone variation.Therefore,the paper will further reveal the response of the total amount of ozone to the Montreal Protocol implementation by analyzing the long-term trends of global atmospheric ozone over the last decades.

Here is our analysis process：

Figure 3　our analysis process