IASI Carbon Monoxide Global and Regional Trends over the period [2008 - 2022] - INSU - Institut national des sciences de l'Univers Access content directly
Conference Poster Year : 2023

IASI Carbon Monoxide Global and Regional Trends over the period [2008 - 2022]

Selviga Sinnathamby
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  • PersonId : 1318635
Sarah Safieddine
Camille Viatte
  • Function : Author
  • PersonId : 1023298
Maya George


Carbon monoxide (CO) is a key atmospheric pollutant that is closely monitored for its role intropospheric chemistry as a modulator of the oxidizing capacity of the atmosphere. It is mainlyemitted into the atmosphere during combustion processes linked to anthropogenic activities(heating, industry, transport) and during biomass combustion (natural fires or burning of agriculturalwaste).Since 2007, three IASI (Infrared Atmospheric Sounding interferometer) instruments have beensuccessively embarked on board of the polar-orbiting meteorological satellites Metop-A, -B and -C.They provide a global and daily coverage of CO concentrations in the atmosphere, with two dailyoverpasses (at 9:30 am and 9:30 pm local time). In February 2022, EUMETSAT reprocessed the wholeIASI CO dataset , providing a homogeneous record of CO, since the beginning of the mission.In this study, and for the first time, we use this 15-years of continuous and homogenized dataset toanalyze the evolution of daytime CO concentrations from January 2008 to December 2022. TheTheil-Sen method is applied on the deseasonalized dataset in order to compute the slope of thetrend. The p-value of Sen’s Slope is determined by using the Mann-Kendall test.Here, we analyze the evolution of CO concentrations on a global and regional scale, and show theevolution of CO concentrations in each hemisphere and in specific regions of the world that aresensitive to biomass fires (Central Africa, South America) and anthropogenic emissions (South andEast Asia, Europe and North America). The results are compared with the documented trends inemission inventories.
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Dates and versions

insu-04316900 , version 1 (30-11-2023)



Selviga Sinnathamby, Sarah Safieddine, Camille Viatte, Juliette Hadji-Lazaro, Maya George, et al.. IASI Carbon Monoxide Global and Regional Trends over the period [2008 - 2022]. EGU Genaral Assembly 2023, Apr 2023, Vienna (Austria), Austria. 2023, ⟨10.5194/egusphere-egu23-5261⟩. ⟨insu-04316900⟩
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