Official Climate Change Thread

Ozymandeas

Ozymandeas

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www.axios.com

New study finds nearly 2 billion at risk from "dangerous heat"

Every 0.1°C increase in global average surface temperatures will expose 140 million people.
www.axios.com www.axios.com

  • The nearly 1.2°C (2.16°F) increase in global average surface temperatures to date has already knocked more than 600 million people out of the "human climate niche" in which society has historically thrived.
  • The researchers of the study, published Monday in Nature Sustainability, define that niche by looking at how human population density varies with temperature and precipitation.
The intrigue: They find two peaks in population density, one associated with a mean annual temperature of about 13°C (55.4°F), and the other tied to more tropical climates, at 27°C (80.6°F).

  • Outside of these temperatures, conditions tend to be either too wet or dry, or too hot or cold, for high concentrations of people to thrive, the study states.
Click to expand...

Of note: The study found that if countries only meet existing emissions reductions based on current policies, and warming were to reach 2.7°C by 2100 (4.8°F), the top 5 countries most vulnerable to unprecedented heat (based on the number of people exposed) would be India, Nigeria, Indonesia, the Philippines and Pakistan.


  • In this scenario, up to a third of humanity would be exposed to such extreme heat and be well outside the human climate niche, the study found.
Click to expand...
 
nyknick

nyknick

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