Variability of total column ozone during JAN 2005-JUN 2011: Consistency among four independent multi-year data records

Variability of total column ozone for the 78-month period covering JAN 2005 to JUN 2011 has been analyzed using the measurements from four independent multi-year data records: (1) OMI(Ozone Monitoring Instrument), (2) SBUV (Solar backscattered ultraviolet instruments)(version 8.6), (3) GTO (GOME type Total Ozone), and (4) Ground-based (Dobson+Brewer+ Filter) Instruments. For monthly zonal means, the differences between each pair of satellite records show very good agreement with offsets in the range of 1.24% to 2.75%. The corresponding offsets between Ground-based record and satellite records are larger by more than a factor of 2, ranging between 4.85% to 5.85%. The anomalies inferred from satellite records are found to be within 0.85% to 1.98%. The differences in the anomalies from satellite records and Ground-based record range between between 3.6% to 6.0%. Discussions will also be focused on the results illustrating the following findings: (a) The offsets between the three satellite records regarding the variability of total column ozone remain very stable throughout the entire 78-month period, without any significant drift; (b)Outside the northern mid-latitudes, the zonal mean characteristics in the variability of total column ozone could not be accurately represented by ground-based data record due to insufficient spatial coverage of the ground stations.