O3 variability in the troposphere as observed by IASI over 2008–2016: Contribution of atmospheric chemistry and dynamics

摘要: We analyze the ozone (O3) variability in troposphere (from ground to 300 hPa) using eight years (January 2008 – March 2016) of O3 profile measurements provided by Infrared Atmospheric Sounding Interferometer (IASI) onboard MetOp satellite. The capability IASI monitor year-to-year that layer is examined first terms vertical sensitivity, a priori contribution and correlations deseasonalized anomalies with upper layers. present global patterns main geophysical drivers (e.g. solar flux - SF, Quasi-Biennial Oscillations QBO, North Atlantic Oscillation NAO, El Nino/Southern ENSO) variations, obtained applying appropriate annual seasonal multivariate regression models on time series spatially gridded averaged O3. results show are able explain most captured IASI. Large changes Arctic/Euro-Atlantic sector over equatorial band attributed NAO QBO effects, respectively. ENSO modeled as contributor variations tropical where direct effects warm cool phases highlighted clear tropical-extratropical gradient. A strong West-East gradient tropics also found likely reflects an indirect effect related dry conditions. Finally, we perturbs far from into mid- high latitudes significant 4-month time-lag response identified for time.