Increased global heavy fire emission by Madden-Julian Oscillation

Understanding heavy fire activities tied up to climate and its future change is of emerging scientific concern and essential for reducing huge economic costs and life losses from substantial heavy fire hazards under greenhouse warming. Madden-Julian Oscillation (MJO) is a planetary-scale tropical convective system and moves from Asia to the US, generating extreme weather in the midlatitudes. Here, we show that when MJO convective anomalies occur in the western Pacific, the fire emissions in the midlatitudes are two times more likely than when MJO convection is in the Indian ocean. The changes in MJO related to increased fire emissions in the tropics and midlatitudes. Precise MJO predictions may contribute to enhanced subseasonal forecast of the fire activities, aggravating vast social and economic losses (124 words)