The characteristics of turbulent lifted non-premixed hydrogen jet flames under various coflow conditions have widely been investigated due to their relevance to practical applications. Three 3-D direct numerical simulations of turbulent lifted hydrogen/air jet flames in heated coflows near auto-ignition limit are performed to examine the stabilization mechanisms and flame structure of turbulent lifted jet flames. Chemical explosive mode analysis (CEMA) reveals the important variables and reactions for stabilizing the lifted flames.