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HEAT DOME

  Jul 22, 2021

HEAT DOME

Q. Why is this in news?
A.
Parts of Canada and USA are reeling under severe heat wave caused due to a heat dome. 
 
Q. What Is A Heat Dome?
A.
A heat dome occurs when the atmosphere traps hot ocean air like a lid or cap. 
 
Q. What are its causes?
A.
 
Q. How is it created? 
A.
  1. In a process known as convection, the gradient causes more warm air, heated by the ocean surface. 
  2. This rises over the western Pacific, and decreases convection over the central and eastern Pacific. 
  3. As prevailing winds move the hot air east, the northern shifts of the jet stream trap the air. 
  4. Thus winds move it toward land, where it sinks, resulting in heat waves. 
 
Q. What are the Impact of a heat dome?
A.
  1. Lead to a sudden rise in fatalities due to extreme heat like conditions. 
  2. Trapping of heat can also damage crops, dry out vegetation and result in droughts. 
  3. The heat wave will also lead to rise in energy demand, especially electricity, leading to pushing up rates. 
  4. Heat domes can also act as fuel to wildfires, which destroys a lot of land area in the US every year. 
  5. Heat dome also prevents clouds from forming, allowing for more radiation from the sun to hit the ground.