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The Hub Talks: Cloud radiative imbalance in global 3D radiative transfer simulations

Name: The Hub Talks: Cloud radiative imbalance in global 3D radiative transfer simulations
Start: 2025-10-20T10:00:00+02:00
End: 2025-10-20T10:45:00+02:00

October 20 @ 10:00 am – 10:45 am CEST

Speaker: Giulia Roccetti is a visiting us in the Science Hub from 14th to 21st of
October. Giulia recently finished her PhD at the European Southern Observatory
and has started a research fellowship position at ESA/ESAC. There, she will use
EarthCARE data, among other resources, to study how 3D cloud structure affects
their radiative effect.

Abstract: We use 3D cloud fields from the ERA5 reanalysis product to model global-scale 3D radiative transfer in the Earth’s atmosphere. However, strong biases emerge due to the coarse spatial resolution of the ERA5 cloud data. To address this limitation, we have developed a 3D cloud generator capable of representing sub-grid cloud variability and heterogeneity within the ERA5 framework. Using this approach, we find that the simulated cloud radiative effects converge at a horizontal resolution of approximately 6 km. Our next step is to validate this global 3D cloud generator using EarthCARE cloud products and to further investigate how horizontal resolution influences the modeled radiative effects of clouds.