Northward Geophysical Accretion Hypothesis (NGAH) of the Earth: A Hypothesis of Progressive Asymmetric Surface Mass Loading

This study proposes a novel hypothesis suggesting that the northern hemisphere of the Earth is undergoing gradual expansion in its actual radius due to cumulative natural and anthropogenic factors. Geomorphological, geophysical, and economic analyses indicate an annual increase of approximately 0.1 - 0.15 mm/year, equivalent to 1 - 1.5 cm per century. Key contributing factors include geological deposition, thermal accumulation, human activities, and northward movement of resources and materials. Notably, over 90% of the global population and industrial activities are located north of the equator, further enhancing mass accumulation. The derived mathematical model links the rate of radius change (ΔR) to the added mass ( M ˙ ) and time (T), allowing for numerical testing. Cumulative results indicate a radius increase of 5 - 7 cm over 500 years and 10 - 15 cm over 1000 years, with measurable effects on the Earth’s geoid and gravity distribution. The hypothesis opens new avenues in geodynamics, geoid modeling, and long-term geographic and thermal studies, and represents the first model integrating human and geophysical factors into a unified framework. The researcher hopes this study will establish a foundational principle in Earth physics.