Articles | Volume 20, issue 24
Atmos. Chem. Phys., 20, 16023–16040, 2020
https://doi.org/10.5194/acp-20-16023-2020
Atmos. Chem. Phys., 20, 16023–16040, 2020
https://doi.org/10.5194/acp-20-16023-2020

Research article 22 Dec 2020

Research article | 22 Dec 2020

Bias in CMIP6 models as compared to observed regional dimming and brightening

Kine Onsum Moseid et al.

Data sets

Gap filled GEBA data T. Storelvmo https://doi.org/10.5281/zenodo.4382033

CRU TS v4.02 cloud cover data University og East Anglia https://crudata.uea.ac.uk/cru/data/hrg/

Model code and software

CMIP6 project data WCRP https://esgf-node.llnl.gov/search/cmip6/

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Short summary
In this study we compare solar radiation at the surface from observations and Earth system models from 1961 to 2014. We find that the models do not reproduce the so-called global dimming as found in observations. Only model experiments with anthropogenic aerosol emissions display any dimming at all. The discrepancies between observations and models are largest in China, which we suggest is in part due to erroneous aerosol precursor emission inventories in the emission dataset used for CMIP6.
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