Journal Highlights

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

Editors’ Highlight—

Thanks to many years of satellite measurements, there are now datasets with sufficient length of record and density of coverage to allow spatial analysis of interannual variability of tropospheric ozone. This study analyzes eight years of ozone data to identify the main geophysical drivers of its regional and temporal variability. Tropospheric ozone is important for human and ecosystem health, for photochemistry, and for its climate/radiative forcing impacts so understanding long-term variations and trends is of value to the international community. 


Commentary on “O3 variability in the troposphere as observed by IASI over 2008–2016” by Wespes et al.

Vivienne H. Payne, et al.

Evaluation and attribution of variability and trends in tropospheric ozone requires consideration not only of the spatial distribution of ozone precursor emissions and their changes in time but also of variations in transport at regional and global scales. Satellite measurements of tropospheric ozone are now beginning to provide the vertical resolution, length of record, and density of coverage needed for disentangling the factors that influence variability and trends. A recent study by Wespes et al. (2017), utilizing an 8 year data set from the Infrared Atmospheric Sounding Instrument (IASI) satellite instrument to perform a global scale, spatially resolved analysis of influences of geophysical drivers on tropospheric ozone variability, represents a key step toward understanding long-term changes in the distribution of tropospheric ozone and its corresponding impacts on air quality, chemistry, and climate. More…