Publication Abstracts
Cesana et al. 2022
, T. Khadir, H. Chepfer, and M. Chiriaco, 2022: Southern Ocean solar reflection biases in CMIP6 models linked to cloud phase and vertical structure representations. Geophys. Res. Lett., 49, no. 22, e2022GL099777, doi:10.1029/2022GL099777.
Over the Southern Ocean (SO, 40°S-70$degreeS), climate models have consistently underestimating solar reflection. Here we evaluate the relationship between cloud profiles, cloud phase and radiation over the SO in Coupled Model Intercomparison Project Phase 6 (CMIP6) models against Clouds and the Earth's Radiant Energy System and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations. We find that the lack of solar reflection is slightly improved in CMIP6 models compared to CMIP5's, attributable to a better representation of cloud fraction and phase. We show that clouds have a different vertical structure and radiative effect south and north of where the 0°C isotherm meets the surface (∼55°S). Although the models capture the greater vertical extent of clouds south of 55°S, they fail to reproduce the observed increase in solar reflection, which we pinpoint to cloud phase biases. Increasing CMIP6 supercooled liquid cloud opacity should help reduce their persistent shortwave biases.
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BibTeX Citation
@article{ce06200a,
author={Cesana, G. and Khadir, T. and Chepfer, H. and Chiriaco, M.},
title={Southern Ocean solar reflection biases in CMIP6 models linked to cloud phase and vertical structure representations},
year={2022},
journal={Geophys. Res. Lett.},
volume={49},
number={22},
pages={e2022GL099777},
doi={10.1029/2022GL099777},
}
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RIS Citation
TY - JOUR ID - ce06200a AU - Cesana, G. AU - Khadir, T. AU - Chepfer, H. AU - Chiriaco, M. PY - 2022 TI - Southern Ocean solar reflection biases in CMIP6 models linked to cloud phase and vertical structure representations JA - Geophys. Res. Lett. VL - 49 IS - 22 SP - e2022GL099777 DO - 10.1029/2022GL099777 ER -
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