The correlation between edge radiation, electron temperature, and density fluctuations has been studied in the vicinity of the upper poloidal limiter of the TJ‐I tokamak [Phys. Fluids B4, 4007 (1992)]. When edge impurity radiation is strongly peaked in the proximity of the limiter radius, electron temperature fluctuations are notably higher than density fluctuations. Results suggest that edge turbulence may be driven by radiative instabilities.