Analysis on the multiple forcing factors of polar amplification

Abstract

Among the most striking characteristics of the currently imbalanced global warming process is the amplification of heat in the polar regions. Historical records and computer-generated weather patterns both attest to its recurrence. Although the causes of this phenomenon are complex, they can be boiled down to the following three primary factors, including the albedo feedback, the Planck feedback, and the tropical lapse rate feedback. A different study from the past has highlighted the significance of all three reasons separately but without agreement. Literature review and interaction analysis are used to zero in on the key aspects of the corresponding climate model simulation, such as the increased CO2 forcing brought about by quadrupling the level of CO2 from the pre-industry level results by earlier scientists, and the predominate feedback forcing, the lapse-rate feedback. Using the CPL models in the same conditions allowed researchers to determine that the lapse-rate feedback is the primary factor in Arctic amplification, while the Planck feedback's curvature and the surface-albedo problem played secondary roles. In addition, the paper found that decreasing zonal radiative forcing in the polar regions may be more successful than previously anticipated in reducing Arctic amplification because local forcing is larger than external forcing.