South Atlantic Anomaly Influence on Jet‑Stream Dynamics and Surface Climate

This work proposes a novel causal framework for recent climate change, departing fundamentally from greenhouse-gas-centric models. The central hypothesis is that the primary driver of global warming and biospheric stress is the degradation of Earth’s magnetic shielding—most clearly manifested in the progressive enlargement of the South Atlantic Anomaly (SAA), expanding ~5% per two decades within a broader ~5% per century global field decline. The collapse of the Van Allen belts permits deeper penetration of energetic solar and cosmic particles, triggering atmospheric ionization, ozone disruption, stratospheric thermal imbalance, and jet-stream perturbation. A secondary mechanism involves volcanism and tectonic variability, modulated by changes in the composition and convection of Earth’s molten core. These shifts influence aerosol loading, ocean circulation, and carbon fluxes—potentially pacing climate epochs and amplifying external variability. Third, solar variability interacts with the weakened geomagnetic field. Orbital proximity, solar cycles, flares, and coronal mass ejections now exert amplified climatic impacts under diminished shielding. Together, these processes suggest that human contributions to climate forcing may be overstated, and that mainstream attribution frameworks rest on incomplete foundations. This hypothesis yields falsifiable predictions: (1) SAA drift correlates with jet-stream anomalies, (2) mesospheric ozone depletion events cluster in SAA longitudes, (3) geomagnetic variation co-varies with volcanic/tectonic markers, and (4) solar event signatures amplify in surface climate records. The goal is to reframe global warming as the emergent outcome of deep planetary processes interacting with solar forcing—not merely a byproduct of anthropogenic emissions.