Exploiting airborne far-infrared measurements to optimise an ice cloud retrieval

Panditharatne, Sanjeevani; Cox, Caroline; Song, Rui; Siddans, Richard; Bantges, Richard; Murray, Jonathan; Fox, Stuart; Fox, Cathryn; Brindley, Helen

doi:https://doi.org/10.5194/acp-25-9981-2025

Articles | Volume 25, issue 17

https://doi.org/10.5194/acp-25-9981-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-9981-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 17

Research article

|

08 Sep 2025

Research article |

| 08 Sep 2025

Exploiting airborne far-infrared measurements to optimise an ice cloud retrieval

Sanjeevani Panditharatne, Caroline Cox, Rui Song, Richard Siddans, Richard Bantges, Jonathan Murray, Stuart Fox, Cathryn Fox, and Helen Brindley

Supplement

https://doi.org/10.5194/acp-25-9981-2025-supplement

Data sets

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/CDS.BD0915C6

FAAM B895 CIRCCREX and ISMAR flight: Airborne atmospheric measurements from core and non-core instrument suites on board the BAE-146 aircraft Facility for Airborne Atmospheric Measurements et al. https://catalogue.ceda.ac.uk/uuid/6ba397d6c8854da19bcced8ea588c1f9

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Short summary

Upwelling radiation with wavelengths between 15 and 100 µm is theorised to be highly sensitive to the properties of ice clouds, particularly the shape of the ice crystals. We exploit this sensitivity and perform the first retrieval of ice cloud properties using these wavelengths from an observation taken on an aircraft and evaluate it against measurements of the cloud’s properties.