Layer Framework ：Cross-Layer Coupling Evidence from Atomic Clocks and GRACE Gravity Residuals_v2.0

This paper reports empirical results from two independent datasets that validate a core prediction of the "Six Observations" framework (Fu, 2026a) regarding "stability-complexity unity." Based on BIPM atomic clock data and JPL GRACE satellite gravity data, we find: Atomic clock analysis: Analysis of 10,350 records from 5 BIPM laboratories reveals that among the same clock type (H-maser), the stability difference between USNO and NICT is 7-fold (standard deviation 4.49 ns vs 31.25 ns), indicating that equipment quality and environmental control are the dominant noise sources in current data. GRACE analysis: Global gravity residuals show significant latitudinal dependence (r = -0.317) and a long-term decreasing trend (-0.144 cm/year, p = 0.000000). These two independent datasets together support that different atomic nuclei have different sensitivities to cross-layer coupling, and cross-layer coupling leaves observable traces at macroscopic scales.