Analysis Of Total Ozone Column From Ground-based Observation And Satellite Observation At Xianghe

Atmospheric ozone plays an important role in the global climate and environment.It is one of the important research topics in the atmospheric science field.The consistency of total ozone column measurement by the Dobson and Brewer instrument during the period of 2014-2016 at Xianghe site supported by Institute of Atmospheric Physics,Chinese Academy of Sciences are analyzed in the study.The Dobson measurement data during 1979-2016 is used to investigate the long-term variation trend of the total ozone column at Xianghe area.The results show that the average deviation,the average absolute deviation,the standard deviation and the correlation coefficient between Dobson and Brewer instrument data are-0.14DU,8.00DU,36.09DUand 0.964.In general,the total amount of ozone observed by the two instruments agrees well.SO2 concentration has noticeable effect on the Dobson instrument data accuracy.The average deviation of the two sets of instrument data in the SO2 concentration of 0-0.2DU,0.2-0.4DU and>0.4DU atmospheric conditions are respectively 4.8DU,7.0DU,8.0DU.The data deviation of the two sets of instruments increases with the increase of SO2 concentration.Accuracy comparisons were made using years of TOMS,OMI,SBUV ozone data,and Dobson ozone data.The compatibility of TOMS,OMI and SBUV satellite ozone instruments with Dobson ozone data is very high,indicating that satellite ozone instruments have sufficient data accuracy to complement ground-based ozone data.The solar zenith angle effect was studied using the Dobson,Brewer,GOME-2A,GOME-2B,OMI-DOAS,OMI-TOMS ozone data from the Xianghe region in 2014-2016.The relative error between OMI-TOMS and Brewer is generally related to zenith angle,the relative error between OMI-TOMS and Dobson is highly correlated with zenith angle.The zenith angle has a significant effect on the relative error between OMI-TOMS and Dobson.The relative error between OMI-DOAS and Brewer is generally related to zenith angle,the relative error between OMI-DOAS and Brewer is generally related to zenith angle.The relative error between GOME-2A and Brewer is generally related to zenith angle,the relative error between GOME-2A and Dobson is highly correlated with zenith angle.The zenith angle has a significant effect on the relative error between GOME-2A and Dobson.The relative error between GOME-2B and Brewer is generally related to zenith angle,the relative error between GOME-2B and Dobson is highly correlated with zenith angle.The zenith angle has a significant effect on the relative error between GOME-2B and Dobson.Obvious seasonal variations of total ozone column are presented over the past 38 years at Xianghe area.Ozone amount is larger in spring and winter relative to summer and autumn.Variation tendency of ozone amount are also seasonal dependent.Different cycles of ozone amount fluctuation are derived from the long-term Dobson data.The variation tendencies are different during four long periods.Distinct ozone recovery is found from 2000 to 2010;however,ozone depletion tends occur during recent years.