Comparison of ground-based and satellite total ozone measurements over the antarctic station Akademik Vernadsky (1996–2005)

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Space and Atmospheric Physics
1Evtushevsky, OM, 1Grytsai, AV, 2Milinevsky, GP, 1Kravchenko, VO, 1Grytsai, ZI
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
2Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2008, 14 ;(5):074-084
https://doi.org/10.15407/knit2008.05.074
Publication Language: Ukrainian
Abstract: 
The influence of observation conditions (cloudiness, solar zenith angle, total ozone content (TOO values) on the data disagreement is analyzed through the comparison of ground-based and satellite TOC measurements over the Antarctic station Akademik Vernadsky. After transition from Iі to 8і Version of satellite algorithm in 2004, the agreement between the Dobson spectrophotometer and ЕР-TOMS spectrometer measurement results did not change essentially. A mean positive difference of 1.8 % in 1th was replaced by a negative one of -2 % in 8й Version. Mean difference values for cloudless (4.1 %, 137 days) and cloudy (-4.5 %, 1048 days) sky are evidences of the dependence of the satellite and ground-based daily TOC values discrepancy on the cloudiness presence. This dependence remains unchanged in comparison results for both Versions of the TOMS data: mean TOMS - Dobson differences under the observation conditions of clear and cloudy sky are distinguished by almost 9 %. The TOMS - Dobson difference dependence on the observation conditions can point to some overestimation of the ground-based data by the satellite ones under the clear sky and the reverse relationship under the cloudy sky. The largest data disagreement is revealed in the ozone hole period (September – October) for the observations under the cloudy sky conditions. Our results allow one to improve the TOC observation accuracy with regard to the atmosphere state.
Keywords: data disagreement, observation conditions, total ozone content
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