Speaker
Description
There is growing evidence that variability associated with the 11-year solar cycle has an impact at the Earth’s surface and influences its weather and climate. Although the direct global response to the Sun’s variability is extremely small, a number of different mechanisms have been suggested that could amplify the signal, resulting in regional signals that are much larger than expected. The climate models participated to the 5th phase of the coupled model intercomparison project (CMIP5) showed a clear warming in the stratosphere in association to the 11-yr spectral irradiance forcing but the 11-year solar cycle component of climate variability was found weaker and key mechanisms where not well simulated. We demonstrate that updated models participated in the CMIP6 activity suffer from similar discrepancies compared to solar cycle signatures in reanalyses. In some models, the solar cycle component is unreasonably weak, which might be related to improper consideration of the solar cycle forcing. Solar cycle signatures in the CMIP6 models from the stratosphere to the surface are discussed and uncertainties are highlighted.
| Solicited or Contributed | Solicited |
|---|---|
| Presenting author | Stergios Misios |
