Understanding Droughts and Heat Waves: Impacts of High Pressure Systems
This chapter explores the phenomena of droughts and heat waves, which are periods of extreme weather characterized by low and high temperatures, respectively. Droughts occur with a shift in global wind patterns associated with persistent high pressure systems, leading to below-normal rainfall. Conversely, heat waves result from similar high pressure systems that elevate temperatures. Additionally, the chapter discusses cold waves, assessing the effects of humidity on heat through the heat index and estimating heat loss with the wind-chill factor. Understanding these concepts is crucial for weather preparedness.
Understanding Droughts and Heat Waves: Impacts of High Pressure Systems
E N D
Presentation Transcript
Recurring Weather CHAPTER 13.4
Droughts are extended periods of well below normal rainfall; usually occur with a shift in global wind patterns; associated with persistent high pressure systems • Heat wave – an extended period of above normal temperatures; formed by high pressure systems as well Droughts and Heat Waves
A cold wave is an extended period of below normal temperatures; also brought on by high pressure systems; systems are arctic or polar in nature Cold Waves
The heat index assesses the impact of humidity combined with excessive heat on the human body • The wind-chill factor estimates the heat loss from human skin caused by a combination of cold air and wind Heat Index
