Comparison of satellite and aircraft measurements of gas composition in troposphere above the South of West Siberia
M.Yu. Arshinov1, S.V. Afonin1†, B.D. Belan1, V.V. Belov1, Yu.V. Gridnev1, D.K. Davydov1, T. Machida2, Ph. Nédélec3, J.-D. Paris4, A.V. Fofonov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2National Institute for Environmental Studies, 16–2 Onogawa, Tsukuba, Japan
3Laboratoire d’AГ©rologie UMR5560, UniversitГ© Paul Sabatier de Toulouse, 14, Avenue E. Belin, 31400, Toulouse, France
4Unite mixte CEA-CNRS, Bat709, CEL’ Orne des Merisiers 91191 GIF SUR YVETTE, Paris, France
Keywords: атмосфера, газ, зондирование, atmosphere, gas, sensing
Abstract
A comparison of the vertical profiles concentrations of O3, CO, CO2, and CH4 measured with the help of flying laboratory Tu-134 “Optic” (SML) and recovered according to the instrument IASI satellite MetOP is performed. The comparison showed that the absolute difference between the concentration of ozone SML – IASI may vary from 3 to 18 ppb, at a height of 0.5 km and from –8 to –38 ppb 7 km. The relative differences are in the range of 8–30% at 0.5 km and 12–88% at 7 km. For profiles of CO an absolute difference between the concentration of CO SML – IASI can vary from 32 to 103 ppb at an altitude of 0.5 km and from –18 to 23 ppb at 3 km. The relative difference are in the range –4–48% at 0.5 km and –8–20% at 7 km. Maximum difference of methane profiles in the boundary layer reaches 150 ppb, and the minimal one –10 ppb. The average relative difference varies from +2.8 to –0.5%. Maximal and minimal profiles for all flights are in range from 7.8 to 1.2%. Minimum, from –0.4 to –3.4%. The average difference between SML – IASI is in the range ±1.5 ppm, while the individual profiles are not comparable. The maximum and minimum differences for all flights are high, namely, in the atmospheric boundary layer 10 and –12 ppm, respectively. The maximum and minimum relative deviations for all flights are +2.3 and –3.3% in the boundary layer, respectively. Above the boundary layer relative deviations are reduced to ±1.0%.
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