Research Of Satellite Remote Sensing Monitoring Of Atmospheric Ozone Distribution In Arctic

The Arctic is sensitive to global climate change and can be used as an indicator of climate change,while changes in Arctic ozone distribution are closely related to climate change.In this paper,we use three kinds of ozone satellite remote sensing data that are Total Ozone Mapping Spectrometer(TOMS),Ozone Monitoring Instrument(OMI)and the Atmospheric Infrared Sounder(AIRS)since the year 1979.Using the established multivariate regression analysis model then use it to simulate the ozone data sequence,and assess quantitatively the impact of various factors on atmospheric ozone.Combining with backward trajectory analysis method used to trajectory observation of atmospheric transport,we study the North Pacific / North Atlantic,Arctic and Iceland atmospheric ozone respectively.The comparative analysis of the North Pacific and the North show that both oceans are showing a decreasing trend,and with the increase of latitude,the maximum appears in advance of the month.Among the influencing factors,the Equivalent Effective Stratospheric Chlorine(EESC)was the most significant effect on the ozone change,which showed a negative effect.The effect of Solar radiation was positive.The effects of Quasi-Biennial Oscillation(QBO)and El Ni?o-Southern Oscillation(ENSO)have different phase in differences latitudes.The two data sequences QBO and it's effect to the ozone are in the same phase at 0-15�N,which are opposite at 15-30�N and 30-45�N.Meanwhile,ENSO and the ozone change due to the ENSO are in the opposite phase at 0-15�N and 15-30�N,while at 30-45�N are the same phase.ENSO has a strong influence on the distribution of ozone in the North Pacific,while the influence of North Atlantic Oscillation(NAO)mainly affects the North Atlantic region,with a maximum of � 12 DU.In the equatorial region,the ozone content in the North Pacific is lower than that in the North Atlantic.The North Pacific ozone content gradually exceeds the North Atlantic with latitude increasing,and is much higher at 45-60�N than that in the North Atlantic.This change is most pronounced in the late autumn and early spring.OMI lacks data in winter,while AIRS has observational data all year round.The AIRS data can be used to investigate the temporal and spatial distribution characteristics of atmospheric ozone in the Arctic.The reliability investigation results of AIRS data show that the average percentage difference between the two data is less than 6%,and the standard deviation is less than 4%,which indicates that the Arctic AIRS data is reliable.The Arctic winter and spring ozone content up to 455 DU in summer and autumn,the low value area is generally concentrated in the Greenland Sea,the Norwegian Sea and the Barents Sea.We divide the Arctic space into two regions along the line 60W-120 E,include region 1(60W-180W-120E)and region 2(60W-0E-120E).The region 2 corresponds to the North Atlantic,where the dynamic transport results in an ozone content below region 1.Meanwhile,the reduction of ozone occurs mainly in the winter which is below-3DU/a over region 2.Iceland is located in the place where the North Atlantic warm current flows into the Arctic.In winter,due to the impact of NAO,the atmospheric ozone are prone to drastic changes in daily,and this can be used as the marker of the impact of dynamic transport on the Arctic ozone distribution.Combined with AIRS data and HYSPLIT model,the influence of dynamic transport on the distribution of atmospheric ozone over Iceland in winter was investigated.The results show that the daily variation of atmospheric ozone in the Iceland occurs frequently in the winter months,and there is a significant positive correlation between the daily ozone and the NAO index.When NAO is in positive phase,atmospheric ozone in Iceland is mainly affected by westerly.When NAO is in negative phase,it is mainly controlled by north and south direction atmospheric transport.Whether it is positive or negative phase of NAO,the atmospheric ozone decrease when the atmosphere of Iceland from low latitudes and with upward movement,while with the atmospheric sinking movement from high latitude,Icelandic ozone increases.To sum up,the movement of the North Atlantic warm current and the dynamic transport have a great influence on the distribution of Arctic ozone.