Comparison of total column ozone measurements obtained from a global UV spectroradiometer with those from a Dobson spectrophotometer at Melbourne Australia

摘要

During the period August 2001 to February 2003 global solar UV measurements were performed with a high resolution spectroradiometer at Melbourne Australia (37.7°S, 144.9°E). From these measurements total column ozone amounts were derived and compared with those of a nearby Dobson spectrophotometer. The effects of cloud cover, solar zenith angle and the choice of various parameters used for the total ozone retrieval were examined. The comparison showed that mean difference between the two instruments was either -0.3% or +1.8% depending on the choice of parameters used in the total ozone retrieval. The standard deviation of the differences was 2.7% in both cases. It was observed that the presence of smoke haze increased the difference between the instruments and some preliminary work on reducing this effect is presented.