Atmosphere (Oct 2020)
Temperature Correction of the Vertical Ozone Distribution Retrieval at the Siberian Lidar Station Using the MetOp and Aura Data
Abstract
The purpose of the work is to study the influence of temperature correction on ozone vertical distribution (OVD) in the upper troposphere–stratosphere in the altitude range~(5–45) km, using differential absorption lidar (DIAL), operating at the sensing wavelengths 299/341 nm and 308/353 nm. We analyze the results of lidar measurements, obtained using meteorological data from MLS/Aura and IASI/MetOp satellites and temperature model, at the wavelengths of 299/341 nm and 308/353 nm in 2018 at Siberian Lidar Station (SLS) of Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences. To estimate how the temperature correction of absorption cross-sections influences the OVD retrieval from lidar measurements, we calculated the deviations of the difference between two profiles, retrieved using satellite- and model-based temperatures. Two temperature seasons were singled out to analyze how real temperature influences the retrieved OVD profiles. In the stratosphere, when satellite-derived temperature and model are used for retrieval, the deviations may reach absolute values of ozone concentration in the range from −0.97 × 1012 molecules × cm−3 at 19.7 km to 1.05 × 1012 molecules × cm−3 at 25.3 km during winter–spring season, and from −0.17 × 1012 molecules × cm−3 at height of 17.4 km to 0.27 × 1012 molecules × cm−3 at 40 km in summer–fall period. In the troposphere, when satellite-derived temperature is used in the retrieval, the deviations may reach absolute values of ozone concentration in the range from −1.95 × 1012 molecules × cm−3 at 18.6 km to 1.23 × 1012 molecules × cm−3 at 18.2 km during winter–spring season, and from −0.15 × 1012 molecules × cm−3 at height of 11.4 km to 0.3 × 1012 molecules × cm−3 at 8 km during summer–fall season.
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