Decrease in tropospheric O3 levels of the Northern Hemisphere

Wespes et al. (2018) present the global fingerprints of recent changes in the tropospheric O3 levels measured by IASI over 2008 – 2017. Using appropriate multivariate regression methods, we discriminate significant anthropogenic trends from various modes of natural variability captured by IASI. A band-like pattern of significant negative trends of ~|0.5| DU/yr on average is detected during summer in the mid-high latitudes of the North Hemisphere. The influence of continental pollution on that latitudinal band is supported by the analysis of the IASI O3-CO relationship.

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Smallest 2019 ozone hole ever recorded by IASI over Antarctica

While sudden stratospheric warming (SSW) events are more common in the Northern Hemisphere, Safieddine et al. (2020) investigated the rare SSW event in the Southern Hemisphere that occurred in 2019 […]

16.12.2020

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Contribution of ammonia to the formation of fine particulate matter over Paris

The Paris megacity faces frequent fine particulate matter (PM2.5) pollution episodes in spring. At this period of the year, large numbers of the particles consist of ammonium sulfate and nitrate […]

26.01.2020

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Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources

Formic (HCOOH) and acetic (CH3COOH) acids are the most abundant carboxylic acids in the Earth’s atmosphere and contribute to the acidity of rainwater and cloud. Current knowledge is however unable […]

14.01.2020

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