Abstract We utilize the global full-F gyrokinetic code GYSELA to analyze nonlocal transport in presence of modulated heat source, period which is range a timescale. In submarginal stable case, it observed that localized and time-modulated source can trigger both diffusive avalanche-like transport. When source-stimulated occurs, propagation turbulence faster than pulse. addition, speed correlated with intensity source. This correlation also identified from analytic expression derived two-field critical gradient model.