An Evaluation of Solar Irradiance Projected by CMIP6 Models Toward Long-Term Projection of Climate Change

This study assesses the reliablity of CMIP6 models in projecting solar irradiance, a crucial aspect of climate dynamics. While extensive scrutiny has been given to historical data from 1975 to 2000, our primary focus is directed towards assessing the models' performance from 2010 to 2020 and their predictive efficacy for the future. Through a meticulous methodology involving statistical comparisons, validation against measurements, and consideration of external factors, we found that CMIP6 models commendably aligned with observed solar irradiance during the historical period, showcasing their adeptness in replicating past climate conditions. However, an in-depth analysis of the recent decade unveiled deviations from observed solar irradiance, prompting concerns regarding the models' adaptability to the swift pace of contemporary climate change. Shifting our gaze to the prospective view, we explore the models' robustness in adapting to emerging climatic trends and emphasize the necessity of continuous refinement, incorporation of real-time data, and a comprehensive understanding of external factors to enhance accuracy in future predictions. Rapid climate change introduces uncertainties such as aerosol concentrations, greenhouse gas emissions, and solar variability, posing challenges that necessitate constant model adjustment. The implications for climate change mitigation are significant, as reliable solar irradiance predictions inform decisions on renewable energy adoption, agriculture planning, and climate adaptation measures. In conclusion, this study bridges the gap between historical evaluations and future projections, providing valuable insights for policymakers, researchers, and stakeholders invested in mitigating the impact of climate change. Continuous refinement of CMIP6 models and a holistic approach to understanding external factors are crucial for building a robust foundation in addressing the challenges posed by climate change in the coming decades.