extreme weather-极端天气.ppt

Extreme Weather Lu Peng Extreme weather Extreme weather includes unusual, severe or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past. The most commonly used definition of extreme weather is based on an events climatological distribution: Extreme weather occurs only 5% or less of the time. According to climate scientists and meteorological researchers, extreme weather events have been rare. In 2012, the extreme weather events has increased No precipitation penguin An increase in extreme weather events has been attributed to man-made global warming. global warming north, south pole Ocean current and Wind belt Extreme weather * * * *