 Similarly, Kerry Emanuel in "Nature" writes that hurricane power dissipation is highly correlated with temperature, reflecting global warming.Hurricane modeling has produced similar results, finding that hurricanes, simulated under warmer, high CO2 conditions, are more intense than under present-day conditions.Thomas Knutson and Robert E. Tuleya of the NOAA stated in 2004 that warming-induced by greenhouse gas may lead to the increasing occurrence of highly destructive category-5 storms.