Unique lightning activities pertinent to tropical and temperate thunderstorms

► Narrow bipolar pulses (NBPs) were frequently observed in the tropical thunderstorms. ► Isolated breakdown (IBPs) pulses were frequently observed in the temperate thunderstorms. ► NBPs can be speculated to be the unique features of tropical thunderstorms. ► IBPs can be speculated to be the unique features pertinent to the temperate thunderstorms.