Investigating the sign of stratocumulus adjustments to aerosols in the ICON global storm-resolving model

Fons, Emilie; Naumann, Ann Kristin; Neubauer, David; Lang, Theresa; Lohmann, Ulrike

doi:https://doi.org/10.5194/acp-24-8653-2024

Articles | Volume 24, issue 15

https://doi.org/10.5194/acp-24-8653-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-8653-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 15

Research article

|

06 Aug 2024

Research article |

| 06 Aug 2024

Investigating the sign of stratocumulus adjustments to aerosols in the ICON global storm-resolving model

Emilie Fons, Ann Kristin Naumann, David Neubauer, Theresa Lang, and Ulrike Lohmann

Supplement

https://doi.org/10.5194/acp-24-8653-2024-supplement

Data sets

Data for paper "Investigating the sign of stratocumulus adjustments to aerosols in the global storm-resolving model ICON" Emilie Fons et al. https://doi.org/10.5281/zenodo.10580438

MODIS Atmosphere L3 Daily Product Steve Platnick et al. https://doi.org/10.5067/MODIS/MOD08_D3.006

CLAAS-3: the third edition of the CM SAF cloud data record based on SEVIRI observations (https://wui.cmsaf.eu/safira) Nikos Benas et al. https://doi.org/10.5194/essd-15-5153-2023

GPM IMERG Final Precipitation L3 Half Hourly 0.1 degree x 0.1 degree V07 G. Huffman et al. https://doi.org/10.5067/GPM/IMERG/3B-HH/07

ERA5 Hourly Data on Pressure Levels from 1959 to Present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

ERA5 Hourly Data on Single Levels from 1959 to Present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

noaa-goes16 Amazon Web Services https://noaa-goes16.s3.amazonaws.com/index.html

noaa-goes17 Amazon Web Services https://noaa-goes17.s3.amazonaws.com/index.html

Model code and software

Software for paper "Investigating the sign of stratocumulus adjustments to aerosols in the global storm-resolving model ICON" Emilie Fons et al. https://doi.org/10.5281/zenodo.10580242

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Short summary

Aerosols can modify the liquid water path (LWP) of stratocumulus and, thus, their radiative effect. We compare storm-resolving model and satellite data that disagree on the sign of LWP adjustments and diagnose this discrepancy with causal inference. We find that strong precipitation, the absence of wet scavenging, and cloud deepening under a weak inversion contribute to positive LWP adjustments to aerosols in the model, despite weak negative effects from cloud-top entrainment enhancement.