Upon login to the ECMWF Atmosphere Data store on 16 Jan 2025 a warning was
noticed:


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Warning

13 Jan 2025

Known issue with anomalous FRP (and emissions flux) values associated with 
false Aqua MODIS detection at high latitudes over the eastern Arctic for 
the period 9-14 August 2024. Watch the Forum announcement for updates.

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Forum announcement:
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Issue with GFAS and CAMS global forecast outputs due to contaminated observations

Michela
ECMWF Staff
Aug 2024

We are aware of an issue with our Global Fire Assimilation System (GFAS) 
outputs at high latitudes over the eastern Arctic due to some contaminated 
Fire Radiative Power observations on 9 August 2024 and causing an area of 
unrealistic estimated in fire emissions in region. This is also affecting 
the CAMS global atmospheric composition forecasts (e.g. development of 
unrealistic/false plumes of AOD, CO, PM2.5 and GHGs) across the eastern 
Arctic region and some care is currently required in their use.

We are monitoring the situation closely and will share more information 
with you when it becomes available.

ECMWF Support
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source: https://forum.ecmwf.int/t/issue-with-gfas-and-cams-global-forecast-outputs-due-to-contaminated-observations/3995


Anne Kubin, 16 Jan 2025
(kubin@tropos.de)